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Lm4810 Dual 105mw Headphone Amplifier With Active

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October 2018
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Computers & electronics Audio & home theatre Audio amplifiers

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Y.C WW 00Y.CO .TW .TW W 0 W 1 WW .100•Y.C T M . . 1 "Click and Pop" Suppression Circuitry M . O W M O W W Boomer were designed .CO Shutdown 0Y.C amplifiers WWaudio.10power .TWoutput W Current WW .100Y.C M.TW specifically WW .10•0YLow T M . to provide high quality power with a O W .CO components. OM WW of00external W • No C W . Y W C W . Y W T W minimal amount Since the Bootstrap Capacitors Required . W 0 Y W W .1 requireOM M.T .10 W M.TStable .1•00Unity-Gain O LM4810 does not bootstrap capacitors or W C . O W W C W TW for low-power .suited 0is0Yoptimally WW .100Y. .TW snubber networks, 1 it WW .100Y.C M.TW M . M O W O W O W WW .100Y.C M.TW W Y.C WW .100Y.C M.TWportable systems. 0 WW APPLICATIONS T . 0 O W M W W.1 Y.CO The unity-gain stable LM4810 Y.C can .be WW 00Y.CO .TW 0 W TWconfigured by W Phones 0 W 1 0 WW • .Cellular T M . . 1 0 M . external gain-setting resistors. O 1 W O W OM W W WW .100Y.C M.TW W Y.CComputers WW .100Y.C M.TThe 0 WW• Personal T . 0 LM4810 features controlled, activeWan externally M .1 O W .CO • W Microphone OPreamplifier W C . Y W C W . 0 Y W W high, micropower consumption shutdown .TWmode, as W 0 0 Y W T . 1 0 0 W • PDA's T M . . 1 0 M . O 1 W O well as an internal W thermal shutdown protection OM W. WW .100Y.C M.TW WW .100Y.C M .TW WW .100Y.C M.TW mechanism. O W O W O KEYW SPECIFICATIONS WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW W O105mW Continuous W WW 00Y.CO .TW W at 1kHz, • THD+N Average .CO .TW C . Y W W W 0 Y W WPower .into M .1 .T 00 M .10 0.1 OM% (typ) WW 00Y.CO .TW W 1 16Ω WW 00Y.CO .TW C . W W W Y W 0 • W THD+N at 70mW W.1 Y.COM W M.TContinuous Average .101kHz, W.1 Y.COM W O% W Winto W C Power 32Ω 0.1 (typ) . W W W .T W M.T .100 .TW 100 00Y M . O 1 W M . O W C W Current O • Shutdown 0.4 µA (typ) WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM W M.T O W O W W C . W W Y W .T W WW .100Y.C M.TW .100 M.T .100 OM W O W C . O W W C W Y W WW .100Y. .TW WW .100Y.C M.TW M.T .100 M O W O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W Y W WW .100Y.C M.TW WW .100Y.C M.TW .100 W O W O W WW WW .100Y.C M.TW WW .100Y.C M.TW O W WW 00Y.CO .TW W standardW Y.C 0 WW notice T Please be aware that an important concerning availability, warranty, and . 0 Mapplications of .1 use in critical .1 OM thereto appears at W W Texas Instruments semiconductor products and.C disclaimers theW end of thisYdata .COsheet. W W 0 Y W 0 0 W respective .T All trademarks are the property of their .10owners. W.1 OM W W C . W W PRODUCTION DATA information is current as of W publication date. Y W Copyright © 2001–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas M.T .100 O W Instruments standard warranty. Production processing does not C W necessarily include testing of all parameters. WW .100Y. M.T O W WW .100Y.C 1 2 1 2 O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W WW .100Y.C M.TW .TW M O 2013 SNAS125D – FEBRUARY 2001 – REVISED www.ti.com WW 00Y.CO .TW .CAPRIL W Y W 0 T . 1 0 M . 1 M . O W O W Typical Application WW .100Y.C M.TW WW .100Y.C M.TW WW 00Y.CO .TW WW 00Y.CO .TW W W W .1 W.1 Y.COM W M.T OM W O W C . W C W . Y W .T W .100 .TW 00Y M.T .100 OM W O W C . W W.1 Y.COM W C W Y W WW .100Y. .TW M.T .100 .T 00 M O 1 W M . O W C . W .CO .TW WW .100Y .TW WW .100Y.C M.TW M 00Y O 1 W M . O W WW .100Y.C M.TW WW 00Y.CO .TW WW .100Y.C M.TW 1 OM WW 00Y.CO .TW W. WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W .T WW .100Y .100 .TW 100 M . OM W M O W C . O W W C . Y W W .TW W .TW 100 00Y WW .100Y.C M.TW M . 1 M . O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM W M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W W Y W WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T W .100 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W .T W 00 W WW .100Y. M.T .100 W.1 Y.COM W M.T O W O W W C . .C Y W W WW proper .TW WWto Application M.T .100 .Tfor 100 selection 00Y Information M . *Refer information concerning of the input and output coupling O 1 W M . O W C . O W W W Y W capacitors. WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C W .C Audio Amplifier0Application W .CO 1..TTypical WW .100Y. .TW W WW .TCircuit 0 Y WW .100YFigure M 1 M . O W M O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W Y W WW .100Y.C M.TW WW .100Y.C M.TW .100 W O W O W WW WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C WW .100Y.C M.TW W O W WWCopyright © 2001–2013, Texas Instruments Incorporated 2 Submit Documentation Feedback WW .100Y.C M.TW O W W LM4810 Y.C Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W .C W W Y W 0 W T . 0 .T W.1 Y.COMSNAS125D OM www.ti.com – FEBRUARY 2001 – REVISED APRIL 2013 W C . W W .TW 00 .T 1 00Y M . 1 M . O W O W Connection Diagrams WW .100Y.C M.TW WW .100Y.C M.TW WW 00Y.CO .TW .CO .TW WW Top Y W W 0 W View Top View 0 .1 W.1 Y.COM W M.T OM W O W C . W C W . Y W .T W .100 .TW 00Y M.T .100 OM W O W C . W W.1 Y.COM W C W Y W WW .100Y. .TW M.T .100 .T 00 M O 1 W M . O W C . W .CO .TW WW .100Y .TW WW .100Y.C M.TW M 00Y O 1 W M . O W WW .100Y.C M.TW WW 00Y.CO .TW WW .100Y.C M.TW O 1 OM WW Figure W. W .CO .TW Y.C3. SOIC WW Package C . 0 Y W W Figure 2. VSSOP W 0 0 Y W 0 W M.TPackage .1 .T 1 00 M . O 1 W M . O W DGK0008A D0008A O See Package Number W Y.C Number WWSee.Package .TW WW .100Y.C M.TW 100 WW .100Y.C M.TW M O W O W Top View O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W 0 W .1 W.1 Y.COM W M.T .10 OM W O W W C . W C W Y W .T W W WW .100Y. .100 M.T .100 OM W M.T O W C . O W W C W Y W WW .100Y. .TW WW .100Y.C M.TW M.T .100 M O W O W C . 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O 1 specifications. W . O W OM WW .100Y.C M.TW Human body model, 100pF resistor. WW Wdischarged through 0Y.C M.TW Y.C WWa 1.5kΩ 0 0 W(3) T . 1 0 . O then (4) Machine ESDM test is covered by specification 200pF cap is charged toW voltage, WEIAJ IC-121-1981. W the specified W.1 Model .CO A.ofT W W .COinto the 0Y.C M.TW Y(resistance Wdischarged directly IC with no external series resistor discharge path W must be under 50Ohms). W 0 0 Y W 1 0 0 W T . . M .1 with the Exposed-Dap (5) The given soldered to a printed board pad with an .10 θJA is forOanMLM4810 packaged in an NGL0008B .COcopper.T WW circuit Wequivalent W Y WW 00Y.CO .TW C . 0 W W area to that of the Exposed-Dap itself. W 0 Y W W M .1 board copper. .T packaged in an NGL0008B 1 with the Exposed-Dap 0θJA0 is for an LM4810 M . O 1 W (6) The given not soldered to any circuit M . O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C (1)M.TW M O W O W O Operating WW .100Y.C M.TW WW Ratings W Y.C WW .100Y.C M.TW 0 W T . 0 .1 TemperatureW Range −40°C MIN ≤ TA ≤ TMAX .CO≤ T A ≤.T85°C OM WW 00Y W .CO .TW WTW C . Y W W W 0 Y W 1 2.0V ≤OV M 0 . .T SupplyW Voltage (VCC 1 00 CC ≤ 5.5V M . 1 W M . O W O W C W Y.device WW .100Y.C M.TW W beyond which 0the Y.C indicate WW Toccur. . 0 0 WWMaximum (1) Absolute Ratings limits damage to may T . 1 0 M . 1 OM WW 00Y.CO .TW W. WW 00Y.CO .TW C . W W W Y W W Characteristics M .1 (1) (2) .T 00 Electrical W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 1 00 Wspecifications The following DD = 5V unless otherwise .specified, OM MV.T .100 applyOfor OMapply to TA = 25°C. WW. W 1 Y.Climits C . W W Y W C W . W LM4810 0 W .T WW Parameter M.T .100 Units .TW 10Conditions 00Y M . O Test 1 W M . O W C (3) . W (4) (Limits) WW 00Y.CO .TW .TW WW .100Y.C M.TW Typ W Limit .100Y W M O 1 W M . VDD Supply 2.0 V (min) O W .C W Voltage O W WW5.5 .100VY(max) WW .100Y.C M.TW WW .100Y.C M.TW M.T O W O W C . .C .CO .TW VIN = 0V,W WW WWCurrent .TW IDD IO W = 0A 3 00Y .TW 1.3 1mA(max) 00Y WSupply M . 1 00Y M . O 1 W M . .C O ISD Shutdown W WW = V0DD0Y.CO .TW 0.4 SHUTDOWN W2W .µA(max) WW Current W VIN = 0V, VW 00Y Y.C 1 0 W T M.T . 1 0 M . O 1 W M . VOS Output Offset Voltage V = 0V 4.0 50 mV(max) O W C IN . O W Y.C WW .100Y .TW WW .TW WWPower.100Y.C M.TWTHD+N = 0.1%, M PO Output f = 1kHz.100 M O W O W O W Y.C W WW mW RL = 16Ω .TW WW .100Y.C M.T105 100 WW .100Y.C M.TW M . O W O W 65 WWmW(min) 0Y.C W L = 32Ω WW 00Y.CO .TRW WW .100Y.C M.T70W W M.T .10 O 1 W M THD+N Total Harmonic Distortion P = 50mW, R = 32Ω 0.3 % . O O L W O W .C WW .100Y.C M.T =W 20Hz to 20kHzWW .TW 00Y WW .100Y.C Mf.T 1 M . O W O RL = 32Ω; PO = 70mW WW WdB W Crosstalk Channel Separation .CO 70.TW Y.C C . 0 Y W W W 0 0 Y W 0 W .1 .T 00 W.1 Y.COM W WW W.1 Y.COM W W W W 0 W .T 0 W .T .100 W.1 Y.COM W OMdamage to the device may W (1) Absolute Maximum Ratings indicate limits beyond.C which occur. W W Wotherwise specified. Y pin, unless W .T Wrespect to.1the (2) All voltages are measured with 00ground .100 M.T OM W O C . (3) Typical specifications are specifiedW at W +25OC and represent the most likely parametric norm. W C Y W Y. W Wlimits are .ensured (4) Datasheet max/min specification .100 100 by design, M.Ttest, or statistical analysis. W O W WWCopyright © 2001–2013, Texas Instruments Incorporated 4 Submit Documentation Feedback WW .100Y.C M.TW O W W LM4810 Y.C Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W .C W W Y W 0 W T . 0 .T W.1 Y.COMSNAS125D OM www.ti.com – FEBRUARY 2001 – REVISED APRIL 2013 W C . W W .TW 00 1 00Y (1)(2) M.T M . 1 . O W O W Electrical Characteristics W WW .100Y.C M.TW WW .100Y.C (continued) T . M O W limits The following specifications for.CVO specified, TAW = 25°C. DD = 5V unless otherwise W Y.Capply to.T WW apply W 0 Y W W 0 0 W T . 1 0 T M . . 1 LM4810 M . O W Units OM WConditions Parameter Test W Y.C WW 00Y.CO .TW C (3) . 0 W T (Limits) . W 0 Y W Typ Limit (4) 1 0 T M . . 1 0 M OM W. WW 00PPY, .CO .TW W.1 Y.COPSRR .CRatio PowerW Supply Rejection CB = 1.0µF; VW 70 dB W RIPPLE = 200mV Y W 0 W T . 0 0 T .1into 50Ω OM . 1 0 f = 1kHz; Input terminated M . 1 W M . O W C . W .CO WW .100Y .TW 0.8 x VDD V (min) 0Y.C WWVoltage Shutdown High .TW 0Input M 1 00Y VSDIHM.TW M . O 1 W . O W O .C ShutdownW WW .100Y.C M.TW 0.2 x VDD V (max) WW 00Y.CVSDIL W 0YLow W Voltage.1Input TW . 0 T . M 1 OM WW 00Y.CO .TW W. WW(1) (2) 00Y.CO .TW C . W W W Y W W M .1 .TCharacteristics W.1 00 Electrical OM WW 00Y.CO .TW W.1 Y.COM W C . W W Y W W W .Totherwise specified, limits to TA =M W 10=0 3.3V unless O 25°C. W.1apply Y M.Tspecifications applyWforWV.DD .100The following OM C . O W W C . C LM4810 W . 0 Y W Units .TW W .T Test Conditions WW .100Y M .10 .TW Parameter 100 M . O (3) (4) W M (Limits) O W C Typ Limit . O W W C W . Y W Y W .TW WW .1I0DD0Y.C M.TWSupply CurrentW .100 1.0OM.T .100 VM mA W IN = 0V, IO = 0A O W C O W W C W . V = 0V, Y.0.4 W C W . 0 Y W T W . W 0 0 Y W T I Shutdown Current V = V µA . 1 0 0 W SHUTDOWN DD .1 OM W. M.T .1SD0 OINM W C . O W W C W . Y W C V Output Offset Voltage V = 0V 4.0 mV . Y IN .TW W .T W W WW .OS .100 00Y M = 0.1%, f = 1kHz .100 THD+N OM W M.T O W C PO1 Output Power . O W W C W Y W WW .100Y. R = 16Ω .TW WW .100Y.C M.TW M.T .10040 mW O L OM W W C . O W W W mW .C= 32Ω .TW Y W C . 0 Y W T W . W 0 0 Y W R 28 0 L W .T 00 W.1 Y.COM W OM R = 32Ω W.1 PYO.=C25mW, W W.1 Y.COM W THD+N Total Harmonic Distortion 0.4 % W L W W W .T W M.T .100 .TW 100f = 20HzOtoM20kHz 00 . O 1 W M . W C . O C W dB Y W WW 70 WW 00Y.C Channel W WW .10R0LY=.32Ω; PO =.T 25mW WCrosstalk M.T .100 .TSeparation M O 1 W M . O W O Supply Rejection RatioW .C Vripple Y.C PSRRW Power CB =Y = 200mVPP, WW 70 .TW dB 0 1.0µF; W .TW 100 WW .100Y.C M.TW M . 1 f0 = 1kHz; Input terminated into 50Ω M . O W O W .C O W WW .100Y WW 00Y.C W Input HighWW .100Y.C M.TW VW Shutdown.Voltage 0.8 x VDDM.TV (min) SDIH T O 1 W M . O W C W VSDIL WW Shutdown Input Low .CO Voltage WW .1000.2Y.x VDD M.VT(max) WW .100Y.C M.TW W .TW 00Y O 1 W M . W COdevice may (1) Absolute beyond which to CO indicate Y.the WW .100Y.C M.TW WWMaximum Wlimits 0otherwise Y.Ratings WWpin,damage TWoccur. . 0 0 Wvoltages T . (2) All are measured with respect to the ground unless specified. 1 0 M . M at +25OC and represent Ospecified WW 00Y.CO .TW W.1 Y.are COparametric (3) Typical specifications norm. .likely WW the most C W Y W W W 0 W T . 0 W M .1 (4) Datasheet max/min limits are ensured by design,.1 00 specification.T OManalysis. W test, orYstatistical WW 00Y.CO .TW W.1 Y.COM W C . W W W W W .T W .100 W.1 Y.COM W M(1).T(2) .100 OM Electrical Characteristics W O W W C . W C Y W .T W 00 Y. W .TW WWspecifications M .100specified, The following for.T VDD = 2.6V unless otherwise limits apply to TA = 25°C. W.1 OM M .100 apply O W C . O W W C . Y .C W .TW W WW .100Y TW . LM4810 .100 WW .Parameter T M Units . 00Y M O 1 W O WTest Conditions .C OM (3) W (4) W WW .100Y.C M.TW Typ W Limit .100Y(Limits)M.TW WW .100Y.C M.TW W O CO IDD VIN = 0V, O = 0A W Current WIW W 0.9 WW .100Y.mA .CO .TW Y.C WSupply .TW 0 Y W T . 0 0 W M 1 0 Current M M ISD Shutdown VIN = 0V, VSHUTDOWN = V 0.2 µA . O 1 DD W . .C W W WW 00Y.CO .TW 4.0 .CO .TW WW .100YmV YVoltage VOS Output Offset VIN =W 0V 0 WW M.T 1 0 M . O 1 W M . O W C .C PO =W 0.1%, f = 1kHz .CO .TW THD+NW WW .100Y. WWPower .TW .TW 00Y WOutput M 1 00Y M . O 1 W M . RL = 16Ω O W WW 00Y.CO .TW20 0Y.C M.TW WW .10mW WW .100Y.C M.TW RL = 32ΩW 1 16 mW M . W O WW 00Y.CO .TW W .CO .TW W C . Y W W W 0 Y W THD+N Total Harmonic Distortion P = 15mW, R = 32Ω 0.6 % L W M .10 W.1 Y.COM W M.T f =O 20Hz to 20kHz .100 O W O W W C . W .C Y W .T70W WWSeparation M.T .100 .TWRL = 32Ω; POW= 15mW 100 00Y Crosstalk Channel dB M . O 1 W M . O W C . O W .C .C WW dB.100Y WWRejection WW= 200mV PSRR Power CB = 1.0µF; Vripple , 70 .TW 0PP0Y WSupply M.T 1into 00YRatio M.TW M . O 1 W . O f = 1kHz; Input terminated 50Ω W .C W W .CO .TW WW .100Y.C M.TW 0.8 x VDDW V (min).100Y WW M.T 00Y VSDIH Shutdown Voltage .Input High O 1 W M O W C . O W W W Input00Low Y.C VSDIL Shutdown WW .100Y.C M.TW 0.2 x VDD WV (max) .100Y WVoltage .TW 1 W M . WW 00Y.CO .TW WW WW 00Y.CO .TW W W (1) Absolute Maximum Ratings indicate limits beyond which occur. M .1 Mdamage to the device may Opin, W.to1 the ground WW 00Y.CO .TW (2) All voltages are measured with respect unless otherwise specified. C . W W Y W 0 W at +25OC (3) Typical specifications are specified the most likely parametric norm. M .1 M.T .10 and represent W WW 00Y.CO C (4) Datasheet max/min specification limits are ensured byO design, test, or statisticalW analysis. . W W Y W .T 00 W.1 W.1 Y.COM W W W W Copyright © 2001–2013, Texas InstrumentsW Incorporated 00 Submit Documentation Feedback 5 M.T .1 O W C W LM4810 Y. Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W WW .100Y.C M.TW .TW M O 2013 SNAS125D – FEBRUARY 2001 – REVISED www.ti.com WW 00Y.CO .TW .CAPRIL W Y W 0 T . 1 0 M . 1 M . O W O W W Components 0Y.C M.TW WW .Description 0 WW .100Y.C External T . 1 M WW 00Y.CO .TW WW 00Y.CO .TW FunctionalW W W Components Description 1) .1 OM W.1 (SeeYFigure M.T OM W C . O W C W . W C The inverting gain.00 with C . W i, form a high pass filter with fc = .T W input.1resistance, TWRf, set the closed-loop .with 1. W Ri 1 Ri, alongO 00Y along M . .T 00Y M 1/(2πRiCi). 1 W M . O O W WW capacitor W 0Y.C Ci,M WW input .TW W The inputWcoupling 0terminals. 0Y.CblocksM Y.C DC.T voltage at the amplifier's along with Ri, create a highpass filter 1 0 0 T . . 1 0 . O 1 W M . O W C . 2. Ci with fc = 1/(2πR Ci). Refer to SELECTING PROPER EXTERNAL COMPONENTS, for an explanation of determining the O W W C i . Y W C . W .TW .TW 100 00Y M . .TW value of CW i. 1 00Y M . O 1 W M . O .C WW 0along W with Ri, set gain.WW WW 00Y.CO 3. Rf.TW The feedback .TW 00Y 0Y.C Wresistance, Tclosed-loop . 1 M . 1 M . O 1 W O W capacitor. This is the supplyW bypass It provides power supply filtering. to Application Information .C OMS W. WW Refer .TW for proper placement 00Y 0Y.Ccapacitor. .TW of the supply 1 0bypass WW .100Y.C 4. CM M . .TWand selection W 1 M . O O Wcapacitor.Y.ItCprovides O WWto SELECTING W Wpin half-supply filtering. EXTERNAL W 0Y.C PROPER WRefer .TW W is the BYPASS 0 0 W T . 1 0 WW .100Y.C5. CBM.TThis M . 1 M . COMPONENTS for information concerning proper placement and selection of C . O W B O W C . O W W W W W voltage at the Y.C Wamplifier's.1output Wis the outputW 00Y and forms .TDC This coupling capacitor. the a high pass filter with RL at WW .100Y.6.CCO M.T M.T 100 It blocks M . O W O W C O fO = 1/(2πRLCO) W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM W M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W W Y W WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T W .100 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W .T W 00 W WW .100Y. M.T .100 W.1 Y.COM W M.T O W O W W C . W WW .100Y .TW WW .100Y.C M.TW M.T .100 M O W O W C . O W W W Y W WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W Y W WW .100Y.C M.TW WW .100Y.C M.TW .100 W O W O W WW WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C WW .100Y.C M.TW W O W WWCopyright © 2001–2013, Texas Instruments Incorporated 6 Submit Documentation Feedback WW .100Y.C M.TW O W W LM4810 Y.C Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W .C W W Y W 0 W T . 0 .T W.1 Y.COMSNAS125D OM www.ti.com – FEBRUARY 2001 – REVISED APRIL 2013 W C . W W .TW 00 .T 1 00Y M . 1 M . O W O W WPerformance 0Y.C M.TW WW Characteristics 0 WW .100Y.C Typical T . 1 . M WW 00Y.CO .TWTHD+N .CO .TW WW THD+N Y W W 0 W vs vs 0 1 .Frequency W.1 Y.COM Frequency M.T OM W O W C W . W C W . Y W .T W .100 .TW 00Y M.T .100 OM W O W C . W W.1 Y.COM W C W Y W WW .100Y. .TW M.T .100 .T 00 M O 1 W M . O W C . W .CO .TW WW .100Y .TW WW .100Y.C M.TW M 00Y O 1 W M . O W WW .100Y.C M.TW WW 00Y.CO .TW WW .100Y.C M.TW 1 OM WW 00Y.CO .TW W. WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W .T WW .100Y .100 .TW 100 M . OM W M O W C . O W W C . Y W W .TW W .TW 100 00Y WW .100Y.C M.TW M . 1 M . O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW 00Y.CO .TW WW .100Y.C M.TW W WW .100Y.C M.TW 1 Figure 5. 6. W Figure O OM W. O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O THD+N O WW 0THD+N W W Y.C WW 00Y.CO .TW C . 0 W W vs vs W Y W 1Frequency OM.T W . .T Frequency 1 00 M . 1 W M . O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W W .T WW .100Y M.T .100 .TW 100 M . O W M O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T W .100 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W .T W 00 W WW .100Y. M.T .100 W.1 Y.COM W M.T O W O W W C . W WW .100Y .TW WW .100Y.C Figure 7..TW Figure 8. M.T .100 M O W M O W C . O W W W Y C W WW .100Y.C M.TW WW .100Y.THD+N M.T .100 .TW THD+N O W M O W C O W vs WW Y. .TW Y.Cvs WW .100Y.C M.TW Frequency 100 WW .100Frequency M . .TW O W M O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W Y W WW .100Y.C M.TW WW .100Y.C M.TW .100 W O W O W WW WW .100Y.C M.TW WW .100Y.C M.TW O W O W Figure WW .100Y.CFigureM10..TW WW9. .100Y.C M.TW O W O W WW .100Y.C WW .100Y.C M.TW W .CO .TW WW WW Copyright © 2001–2013, Texas InstrumentsW Incorporated 00Y Submit Documentation Feedback 7 1 M . O W C W LM4810 Y. Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W WW .100Y.C M.TW .TW M O 2013 SNAS125D – FEBRUARY 2001 – REVISED www.ti.com WW 00Y.CO .TW .CAPRIL W Y W 0 T . 1 0 M . 1 M . O W O W Characteristics W Y.C Performance WW .100Y.C(continued) .TW THD+N 0Typical WW .10THD+N T . M M O W O W vs WW .100Y.C M.TW W 0vsY.C M.TW WW .Frequency Frequency 0 T . 1 O W O W OM WW .100Y.C M.TW W Y.C WW .100Y.C M.TW 0 T . 0 WW 00Y.CO .TW W.1 Y.COM W WW 00Y.CO .TW W W 0 T . 0 W.1 Y.COM W W.1 Y.COM W W W.1 Y.COM W W W .T 00 W M.T .100 W.1 Y.COM W M.T .100 O W O W W C . .C W W WW .100Y .TW M.T .100 .TW 00Y M O 1 W M . O W C . O W W WW .100Y WW .100Y.C M.TW WW .100Y.C M.TW M.T O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W 0 W .T 0 W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T W .100 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W FigureW 11. .T W WW .100Y. .100Figure 12. M.T .100 OM W M.T O W C . O W W C W Y W WW .100Y. .TW THD+N WW .100Y.C M.TW M.T .100THD+N M O W O vs vs W C . O W .C W WW .1Frequency .TW 00Y .TW 00Y WW .100Y.C M.TW FrequencyW M 1 M . O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W W .T WW .100Y M.T .100 .TW 100 M . O W M O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T W .100 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W .T W WW .100Y. .100 .TW M.T .100 OM W M O W C . O W W C . Figure 13. Figure Y W14. .TW WW .100Y .TW 100 WW .100Y.C M.TW M . M O W W WW 00Y.CO .TW CO WW .100Y.C M.TW THD+N W W WW .100Y.THD+N T . 1 M . vs M vs O W O W O W WW .100Y.C M.TW W WW .100Y.C M.TW Output Power 0Y.C Power WW .10Output T . OM WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W .1 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W .T W W WW .100Y. .100 M.T .100 OM W M.T O W C . O W W C W Y W WW .100Y. .TW WW .100Y.C M.TW M.T .100 M O W O W C . O W WW .100Y .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .T W.1 Y.COM W W W W W .T 00 W W.1 Y.COM M.T .100 W.1 Y.COM W O W W W C . W W .T WW .100Y .100 .TW 100 M . W M O W O W WW WW .100Y.C M.TW WW .100Y.C M.TW O 16. W Figure 15. Figure O W WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C WW .100Y.C M.TW W O W WWCopyright © 2001–2013, Texas Instruments Incorporated 8 Submit Documentation Feedback WW .100Y.C M.TW O W W LM4810 Y.C Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W .C W W Y W 0 W T . 0 .T W.1 Y.COMSNAS125D OM www.ti.com – FEBRUARY 2001 – REVISED APRIL 2013 W C . W W .TW 00 .T 1 00Y M . 1 M . O W O W Characteristics W Y.C Performance WW .100Y.C(continued) .TW THD+N 0Typical WW .10THD+N T . M M O W W W vs .CO .TW WW .100Y.C M.TOutput W 0vsYPower WW Output Power 0 T . 1 M . O W M O W C . O W C W . Y W C W . Y W .T W .100 .TW 00Y M.T .100 OM W O W C . W W.1 Y.COM W C W Y W WW .100Y. .TW M.T .100 .T 00 M O 1 W M . O W C . W .CO .TW WW .100Y .TW WW .100Y.C M.TW M 00Y O 1 W M . O W WW .100Y.C M.TW WW 00Y.CO .TW WW .100Y.C M.TW 1 OM WW 00Y.CO .TW W. WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W .T WW .100Y .100 .TW 100 M . OM W M O W C . O W W C . Y W W .TW W .TW 100 00Y WW .100Y.C M.TW M . 1 M . O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W Y.C 18. .TW W Y.C WW .100Figure FigureW 17.W 0 T . 0 WW .100Y.C M.TW M 1 W OM W. .CO .TW O W W C . Y W C W . 0 Y W W W 0 Y W .T THD+N W M .100 W.1 THD+N M.T .100 OM vs vs.CO W O W W C . Y W C W . 0 Y W W Output Power Output Power .TW W 0 0 Y W T . 1 0 W M . .T 1 00 M . O 1 W M . O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W W .T WW .100Y M.T .100 .TW 100 M . O W M O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T W .100 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W .T W WW .100Y. .100 .TW M.T .100 OM W M O W C . O W W C . Figure 19. Figure Y W20. .TW WW .100Y .TW 100 WW .100Y.C M.TW M . M O W W WW 00Y.CO .TW CO WW .100Y.C M.TW THD+N W W WW .100Y.THD+N T . 1 M . vs M vs O W O W O W WW .100Y.C M.TW W WW .100Y.C M.TW Output Power 0Y.C Power WW .10Output T . OM WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W .1 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W .T W W WW .100Y. .100 M.T .100 OM W M.T O W C . O W W C W Y W WW .100Y. .TW WW .100Y.C M.TW M.T .100 M O W O W C . O W WW .100Y .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .T W.1 Y.COM W W W W W .T 00 W W.1 Y.COM M.T .100 W.1 Y.COM W O W W W C . W W .T WW .100Y .100 .TW 100 M . W M O W O W WW WW .100Y.C M.TW WW .100Y.C M.TW O 22. W Figure 21. Figure O W WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C WW .100Y.C M.TW W .CO .TW WW WW Copyright © 2001–2013, Texas InstrumentsW Incorporated 00Y Submit Documentation Feedback 9 1 M . O W C W LM4810 Y. Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W WW .100Y.C M.TW .TW M O 2013 SNAS125D – FEBRUARY 2001 – REVISED www.ti.com WW 00Y.CO .TW .CAPRIL W Y W 0 T . 1 0 M . 1 M . O W O W Characteristics W Y.C Performance WW .100Y.C(continued) .TW 0Typical WW .10THD+N T . M M O W W Output W Power vs .CO .TW WW .100Y.C M.T W 0vsYPower WW Output Load Resistance 0 T . 1 M . O W O W OM WW .100Y.C M.TW W Y.C WW .100Y.C M.TW 0 T . 0 WW 00Y.CO .TW W.1 Y.COM W WW 00Y.CO .TW W W 0 T . 0 W.1 Y.COM W W.1 Y.COM W W W.1 Y.COM W W W .T 00 W M.T .100 W.1 Y.COM W M.T .100 O W O W W C . .C W W WW .100Y .TW M.T .100 .TW 00Y M O 1 W M . O W C . O W W WW .100Y WW .100Y.C M.TW WW .100Y.C M.TW M.T O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W 0 W .T 0 W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T W .100 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W FigureW 23. .T W WW .100Y. .100Figure 24. M.T .100 OM W M.T O W C . O W W C YPower vs .TW Y. W WW .TW vs Output WW .100Y.C M.TW Output Power M .100Resistance 100 M . W O Load Resistance Load W .CO .TW O W W .C Y W C W . 0 Y W W W 0 0 Y W T . 0 W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM W M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W W Y W WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T W .100 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W .T 00 W WW .100Y. FigureM25. Figure 26. .TW M.T .100 W.1 Y.COM W O W O W W C . W 00 Y.C Power.TvsW WW .100Y .TW Output Power WW .100Output M.T M vsW.1 O M O W C . O W W W Y Supply Voltage W WW .100Y.C M.TW Power Supply WW .100Y.C M.TW M.T .100 O W O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W Y .C W W WW .100Y.C M.TW WFigure .100 .TW 00Y 1 27. Figure 28. W M . O W O W WW WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C WW .100Y.C M.TW W O W WWCopyright © 2001–2013, Texas Instruments Incorporated 10 Submit Documentation Feedback WW .100Y.C M.TW O W W LM4810 Y.C Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W .C W W Y W 0 W T . 0 .T W.1 Y.COMSNAS125D OM www.ti.com – FEBRUARY 2001 – REVISED APRIL 2013 W C . W W .TW 00 .T 1 00Y M . 1 M . O W O W Typical Characteristics W W Y.C Performance WW .100Y.C(continued) .TDropout 0 WW Output T . 0 M 1 Power vs Voltage vs M . O W W Supply Supply W Voltage .CO .TW Y.C WWPower 0 Y W T . W 0 0 W 1 0 M . .T M .1 OM WW 00Y.CO .TW WW 00Y.CO .TW C . W W Y W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W .T 00 .T 00 W.1 Y.COM W W.1 Y.COM W W W.1 Y.COM W W W .T 00 W M.T .100 W.1 Y.COM W M.T .100 O W O W W C . .C W W WW .100Y .TW M.T .100 .TW 00Y M O 1 W M . O W C . O W W WW .100Y WW .100Y.C M.TW WW .100Y.C M.TW M.T O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W 0 W .T 0 W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W 0 W .T W M Figure 29. W.10 W.1 Figure M.T .100 OM .CO30. .TW O W W C . Y W C W . 0 Y W W W 0 0 Y W T . 0 W .1 Dissipation .T Power Dissipation vs 00 OM vs W.1 Y.COM W .CPower WWPower W.1 Y.COM W W Y W 0 W W Output Power Output W .T W M.T .10 .T 100 00 M . O 1 W M . O W C . O W WW .100Y .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W W .T WW .100Y M.T .100 .TW 100 M . O W M O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T W M .1 .100 M.T .100 OM W Figure 31. FigureW 32.W .CO .TW O W C . Y W C W . 0 Y W W W 0 0 Y W T . 0 W .T 00 W.1 Y.COM W W.1 Y.COM W OM W W.1 Power Dissipation vs W C . W W W .T Channel Separation W M.T .100 .TW 100 00YOutput Power M . O 1 W M . O W C . O W W W Y W WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W Y W W W 33. 00Y.C WW .100Y.C Figure .T34. WFigure .100 .TW M 1 W M . O W O W WW WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C WW .100Y.C M.TW W .CO .TW WW WW Copyright © 2001–2013, Texas InstrumentsW Incorporated 00Y Submit Documentation Feedback 11 1 M . O W C W LM4810 Y. Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W WW .100Y.C M.TW .TW M O 2013 SNAS125D – FEBRUARY 2001 – REVISED www.ti.com WW 00Y.CO .TW .CAPRIL W Y W 0 T . 1 0 M . 1 M . O W W Typical .CO Performance Characteristics WW .100Y.C(continued) .TW WW .1Noise 00Y Floor M.TW M Power Supply Rejection Ratio O W W W Y.C WW 00Y.CO .TW 0 W T . W 0 W 1 M . .T 1 M . O W M O W C .CO .TW WW .100Y. .TW WW .100Y.C M.TW M 00Y O 1 W M . O W O W WW .100Y.C M.TW W Y.C WW .100Y.C M.TW 0 T . 0 1 OM WW 00Y.CO .TW W. WW 00Y.CO .TW C . W W Y W M .1 M.T .100 W.1 Y.COM W WW 00Y.CO .TW W W WW 00Y.CO .TW W .T 00 W.1 Y.COM W M .1 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM W M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W W Y W WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W .C O W W WW 00Y.CO .TW WW .100YFigure W35. Figure 36. WW .100Y.C M.TW M.T 1 M . O W O W C O W Y. WW .100Open .TW WW .100Y.C M.TW WW .100Y.C M.TW Open Loop M Loop O W O W .C O W Frequency Response W WW Frequency 00Y Response WW .100Y.C M.TW 1 WW .100Y.C M.TW M.T . O W O W C . O W WW .100Y .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W W .T WW .100Y M.T .100 .TW 100 M . O W M O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T W M .1 .100 M.T .100 Figure 37. FigureW 38.W OM W .CO .TW O W C . Y W C W . 0 Y W W W 0 0 Y W T . 0 W M .1 .T 00 W W.1 Y.COM W Supply Current .CO .TW OM W Loop vs W.1 Y.Open Y W C 0 W W W W .T Frequency Response Supply Voltage .10 00 W OM W M.T .100 W.1 Y.COM W C . O W W W Y W C . W W .T WW .100Y M.T .100 .TW 100 M . O W M O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W Y W W W 39. 00Y.C WW .100Y.C Figure .T40. WFigure .100 .TW M 1 W M . O W O W WW WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C WW .100Y.C M.TW W O W WWCopyright © 2001–2013, Texas Instruments Incorporated 12 Submit Documentation Feedback WW .100Y.C M.TW O W W LM4810 Y.C Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W .C W W Y W 0 W T . 0 .T W.1 Y.COMSNAS125D OM www.ti.com – FEBRUARY 2001 – REVISED APRIL 2013 W C . W W .TW 00 .T 1 00Y M . 1 M . W O W .CO .TW INFORMATION WW 00Y WW .100Y.C MAPPLICATION .TW 1 M . W O W .CO .TW W C . Y W W 0 Y W W 0 WSHUTDOWN MICRO-POWER .T .100 W.1 Y.COM W M.T OM W O W C . W C Wcontrols the . W LM4810's .Tfunction. Activate micro-power The.Tvoltage applied pin W W to the.1SHUTDOWN .T 00Y .100 shutdown 00Y OM W M OM to the SHUTDOWN C by applying W aW logic high .voltage pin. The logic threshold . W W.1 Y.COshutdown C W is typically VDD/2. When Woff the .amplifier's .Tcircuitry, W LM4810's 00Y 0Y shutdown Wmicro-power TW . 1 0 0 T M . active, the feature turns bias reducing the supply 1 0 M . O 1 W W .C OM The low 0.4µAW W W. W .CO current Y C current. typical shutdown is achieved by applying a voltage that is as near as VDD as W . 0 Y W T . W 0 0 Y W T . 1 M .increase .Tto the SHUTDOWNWpin. 10A voltage 00 possible M . O 1 W M . that is less than V may the shutdown current. O DDW .C W WW 00Y.CO .TW .TW 00Y WW .100Y.C M.TW 1 M . O 1 W There are a few ways to control the micro-power shutdown. These include using a single-pole, single-throw C OM W W. W .CO When Y.an WW C W . 0 Y W W W 0 0 Y W T switch, a microprocessor, or a microcontroller. using a switch, connect external . W M.T 100kΩ pull-up resistor .1 .T 10 00 M . O 1 W M . O W O the SHUTDOWN W between pin and VDD ..CConnect the switch between SHUTDOWN pin and GND. Select W Y.C WW the .TW Y.C amplifier W by closing .TW 100 00Ythe switch. WW .100normal M . .TW operation 1 Opening the switch connects the SHUTDOWN pin to VDD M . O W M W O the pull-up resistor,Wactivating W W through CO W ensure that the .micro-power Y.C C W . 0 Y shutdown. The switch and resistor W T W . W 0 0 Y W T . 0 W M .1 .T 00 M O This unwanted state changes. In a system with a microprocessor or a W.1prevents .CO OM pin will not float.W WW W.1 SHUTDOWN C . Y C W . 0 Y W TWthe SHUTDOWN W . W 0 0 Y W T . 1 microcontroller, use a digital output to apply the control voltage to the SHUTDOWN pin. Driving 0 0 W T M . . 1 0 M W.pull-up OM circuitry eliminatesWthe WW 00Y.CO .TW W.1pin with CO .resistor. active C W . Y W W W 0 Y W T . 0 0 W .1 W.1 Y.COM W M.T .10 OM W O W W C . W C W Y W .T W Y. W PACKAGE PCB MOUNTING CONSIDERATION WW EXPOSED-DAP .100 M.T .100 OM W M.T .100 O W C . O W W C Y W provides .TW resistance exposed-Dap (die attach10 paddle) 0Y. package WW .TW (NGL0008B) 0Y.C M WW The.10LM4810's Mthermal .100 a low .TW M . O W O W C . between the die and the PCB to which the part is mounted and soldered. This allows rapid heat transfer W W W W .CO .TW 0Y Y.C Wair. TW from the . 0 0 Wtraces, T . 1 0 WWdie to.1the M . PCB copper ground plane, and surrounding 1 00Ysurrounding M . M WW 00Y.CO .TW W WW 00Y.CO .TW .COpackage W W Y W 0 WW T The NGL0008B should have its DAP soldered to a copper pad on the PCB. DAP's PCB copper pad OM W.1The Y M. .10 OM copper. This planeW W.1 unbroken C . O W C Wheat sink, . W C may be connected to a large plane of continuous forms a thermal mass, W . Y W W W .T Wand M.T .100 100 00Yarea. M.TW M . O 1 W radiation . O W WW .100Y.C M.TW WW 00Y.CO .TW WW .100Y.C M.TW W 1 However, since the LM4810 is designed for headphone applications, connecting plane M . O W CO to the O WaWcopper W WDAP's .CPerformance Y.that W C W . 0 Y W T W . W 0 0 PCB copper pad is not required. Figure 33 in Typical Characteristics shows the maximum Y W T . 0 W M .1 .T 00 M Wa.15V power OM45mW per amplifier W powerW dissipated with and a 32Ω load. WW 00Y.CO .TW W.1 Yis.Cjust .COsupply W Y W W 0 W T 0 W M .1 00 M. fabrication, and W M.T information concerning Olayout, W.1 PCB Further detailed specific mounting .CanO NGL0008B O W W.1 and C W . Y W C W . 0 Y W W W Instruments' .TEngineering GroupWunder W package M.T note .10 application .TWfrom Texas (WSON) 100 Package 00Yis available M . O 1 M . O W C AN1187.WW .CO .TW WW .100Y. .TW WW .100Y.C M.TW W M 00Y O 1 W M . O W O W WW .100Y.C M.TW W Y.C WW .100Y.C M.TW POWER DISSIPATION 0 WW T . 0 1 O W OM WW 00Y.CO .TW W. .Camplifier Wany C W . Y W W W 0 Y W T Power dissipation is a major concern when using power and must be thoroughly 0 W M. .10 OM to W.1 understood M.T 1 states the maximum .10design. O W C . O W W C ensure a successful Equation power dissipation point for a single-ended amplifier . W .C W W .TW W driving aW 00Y 0Y load.M.TW 1 0 T M . . 1 00Y voltage . operating W at a given.1supply and specified output O W O W OM W2 W 2 Y.C WW .100Y.C M W WW .100Y.C M.TW PDMAX =W (VW RL) (1).T 0 T DD) / (2π . 0 O 1 W M . O W C W .C Y. W package, .CO .TW WW dissipation .TW Since the LM4810 amplifiers inW one .TW internal power 100 point 00Ythe maximum WW has.1two M . 1 00Yoperational M . O W M W .C the .TW O results from Equation is twice that of the number which 1. Even Y withOthe large internal power WW dissipation, WW W a large range 00Y 0 .C Y.Csinking .over WWof ambient TW From Equation . 1 0 0 T . LM4810 does W not require heat temperature. 1, assuming aM 1 0 M . O O .Cthe OMthe maximum power WW Thus W.a1 32ΩY.load, .Cpoint Y WW C W 5V power supply and dissipation is 40mW per amplifier. 0 Y W W .TW W 0 0 W T . 1 0 W M . .T80mW. The maximum 1 00 point M M . O 1 W . maximum package dissipation is power dissipation point obtained must not be O W O W WW .100Y.C M.TW Wfrom Equation Y.Cthat results WW2: .100Y.C M.TW greater than the power 0 WW dissipation T . 0 1 .CO .TW OM WW 00Y(2) W. WW 00Y.CO .TW C PDMAX = (TJMAX − TW . W A) / θJA W Y W W .T 00 .1 W.1 Y.COM W OM Depending on W W OM TJMAX = 150°C W.θ1JA =Y.210°C/W. C . W For package DGK0008A, for the LM4810. the ambient C W Y W W T .the 100 00 to find M.T .power .TWEquation 2Wcan W 1used 00surroundings, M . O 1 W temperature, TA, of W the system be maximum internal M . O C . O W W Y W Y.C WW 2, .then W result of W dissipation supportedW byWthe IC 0packaging. Equation than .TWthat of Equation 100 0Y.C MIf.Tthe M.T 110is0 greater M . O 1 W . O W O W typical either the supply voltageW must the load impedance increased ForWthe W be decreased, Y.C W Y.C or T.ATreduced. WWambient 100 00temperature 0Y.aC 32ΩMload, W supply, M.T . .TWthe maximum 1 0with application of a 5V power possible without violating M . O 1 W . O W C . O W W Y W W the maximum junction temperature approximately that operation is around the W 0Y.Cdevice Wprovided .T WW .100isY.C .is100 .TWis a133.2°C 10power M . W M O maximum power dissipation point. Power dissipation function of output and thus, if typical operation W .CO .the WWRefer WWdissipation 0Y.C WW .10may .TW accordingly. not around the maximum W power be increased TWambient temperature 00Y point, M 1 M . W O dissipation information W for power CO powers. .output to Typical Performance Characteristics WW for.1lower .TW 00Y WW .100Y.C M.TW M O W O W WW .100Y.C WW .100Y.C M.TW W .CO .TW WW WW Copyright © 2001–2013, Texas InstrumentsW Incorporated 00Y Submit Documentation Feedback 13 1 M . O W C W LM4810 Y. Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W WW .100Y.C M.TW .TW M O 2013 SNAS125D – FEBRUARY 2001 – REVISED www.ti.com WW 00Y.CO .TW .CAPRIL W Y W 0 T . 1 0 M . 1 M . O W O W POWER SUPPLY W Y.C WW .100Y.C M.TW 0 WW BYPASSING T . 0 M .1 CO performance WW for 0low As with any power amplifier, bypassing isW critical and high power supply .COsupply Y.noise WW 0proper W 0 Y .TW W 0 W T . 1 T M . . 1 rejection. Applications that employ a 5V regulator typically use a 10µF in parallel with a 0.1µF filter capacitors to M . W .CO the OM Wline, W .CO noise Y WWoutput, C W . 0 Y W T stabilize the regulator's reduce on the supply and improve supply's transient response. . W 0 0 Y W T .1 00 M. the need for a local .10 not eliminate OM bypass capacitance connected W M.T O W their presence does 1.0µF tantalum C . W W.1 Y.COHowever, C Y Wlength .of .TW that connect capacitors 0Y. and M WWsupply .TW Keep the 100leads and between ground. Mtraces .TWthe LM4810's 10pins 00 . O 1 W M . O W C . O W .C and.Tground Y Connecting the LM4810's power supply as short W .Cbetween WWas possible. .TW a 4.7µF capacitor, CB, WW 100 stability 00Y pin M . .TW 1 00Y between M . O 1 the BYPASS pin and ground improves the internal bias voltage's and improves the amplifier's W M . O O W .C as.Tthe Y.C increases. WW 00increase W 0 Y W WW 00Y.C .TW Too large, however, W 0 W PSRR. The PSRR improvements bypass pin capacitor value 1 T M . . 1 M . O 1 W M O selection of bypassWcapacitor Yvalues, W time. .C increases turn-on The especially CB, depends on W. .CO .Tthe W .TWPROPER W amplifier's 0in0 SELECTING 0Y.Cpop M WW click TW . 1 0 WW .100Ydesired M . 1 PSRR requirements, and performance (as explained EXTERNAL . O W OM WW 00Y.CO .TW W C . W C W . COMPONENTS), system cost, and size constraints. Y W W W Y W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W .T 0Y WW .10SELECTING PROPER EXTERNAL .100 .TW 100COMPONENTS M . OM W M O W C . O W W C W . Y W .C the.TLM4810's 0 .TThough W 0Y W .TW selectingWexternal 10components. performance properly the LM4810 0requires WW .1Optimizing M . 1 00Y M . O W M O W .C is achieved O W W operates C W . well when using external components with wide tolerances, best performance by optimizing Y W C W . 0 Y W T W W .T W M. .10 .TW 100 00Y M . component values. O 1 W M . O W C O W .C WW .100Y. .TW WW a.1designer .TW design flexibility. 00Y maximum 0Y.C isMunity-gain WW The M .TW 0LM4810 M stable, giving The gain should be set to no more O 1 W . O O W THD+N W W signal-to.Camplifier Y.Cand maximum WWallows W 0 Y W requires. This the to achieve minimum . W 0 0 Y.C application W T . 1 0 WW than.1a00given T MT . . 1 M . O W M O W C noise ratio. These parameters are compromised as the closed-loop gain increases. However, low gain . W W demands W W output power. .CO .TW voltage W 0Y many Y.C maximum WW Fortunately, Tsignal . 0 0 T . 1 0 WWinput.1signals swings to achieve sources M . 1 00Y withMgreater . O W OM). Please refer to AUDIO W .CAMPLIFIER O W W as audio C W . Y W C such CODECs have outputs of 1V (2.83V POWER DESIGN W . 0 Y W T W RMS P-P . 0 W .T 0Y W for more .TW .100 W.1 Y.COM W selecting the proper Mon .10information OM Wgain. O W W C . W C W . Y W .T W 00 W WW .100Y M.T .100 W.1 Y.COM W M.T O W O W W Input and Output Capacitor Value Selection C . W WW .100Y .TW WW .100Y.C M.TW M.T .100 Minput O W O W C . Amplifying the lowest audio frequencies requires high value and output coupling capacitors (CI and in O W W W 0Yportable Wefficiency .TWCO In W can beW 0in 0Y.C Y.C TW . 1 0 0 WW 1). A T M . . Figure high value capacitor expensive and may compromise space designs. 1 0 M . W M O W .COlittle .ability W.1 however, Wportable manyW cases, speakers used in systems, whether have W internalWorWexternal, .CO the.T 0Y Y.C TW to W 0 0 Y W T . 1 0 0 W M . 1 M . O W M .10 below reproduceWsignals 150Hz. Applications using speakers with this limited frequency response reap little W W .CO .TW Y.C WWcapacitors. .CO 0 Y W T . W 0 0 Y W improvement using high value input and output 1 0 0 WW .by T M . . 0 M .1 WW 00Y.CO .TW W 1 Y.COM W .ConO the .LM4810's WW W Y W W 0 W T Besides affecting system cost and size, C has an effect click and pop performance. W i .1 M .10 OM The W M.T proportional .100pop isOdirectly O W C . W Wthe magnitudeWof to the input capacitor's size. Thus, pops can be minimized C W W W .Tby W 00Y 0Y. Y.C value WW than Tmeet . 1 0 0 Wan input T M . . 1 0 selecting capacitor that is no higher necessary to the desired −3dB frequency. Please M . O 1 W M . O W C . O W Y .C Y.C WWdetailed TW refer to the .on W POP REDUCTION WW .100PERFORMANCE .TW for a more 100discussion WWOPTIMIZING M . .TAND 00Y CLICK M O 1 W M . O click and pop performance. W WW .100Y.C M.TW WW 00Y.CO .TW WW .100Y.C M.TW W 1 W pass filter As shown in Figure input a −3dB W high W capacitor, .COcutoff.TW OMresistor, RI and theWinput W. 1, the .CO CI, .produce Yproduce C W . 0 Y W W W 0 0 Y W T frequency that is found using Equation 3. In addition, the output load R , and the output capacitor C , W LM .10 W.1 O Y.COMa W M.Tdefined by Equation .100 frequency O W O W Wcutoff C -3db high pass W filter 4. . W W Y W W Y.C W W M.T .100 M.T .100 O(3) 100 W M.T fI-3db=1/2πRICW O W C I . . O W C W Y W WW .100Y. .TW WWLCO .100Y.C M.TW M.T .100 fO-3db=1/2πR (4) M O W O W C O W 0Y. Y.C of capacitor WWin the .TW Y.C be taken WW .TW to be used 10system. 00type WW .100must Also, careful consideration a certain M . .TWin selecting 1 M . O W M O W unique .C O electrolytic, ceramic) W Different types of capacitors (tantalum, WW .and W 00Ymay M.TW 0Y.C performance Y.C WW have TW characteristics . 1 0 0 WWperformance. T . 1 0 M . 1 affect overall system OM WW 00Y.CO .TW W. WW 00Y.CO .TW C . W W W Y W W .T 00 W.1 Y.COM W W.1 Y.COM W OM W W.1Selection Bypass Capacitor Value W C . W W W .T W M.T .100 .TW 100 00Y M . O 1 W M . O W C . O Besides minimizing the input capacitor size, careful consideration should be paid to the value of C , the capacitor W W W W 0Y Y.C .TtoWquiescentBW 0Y.C CB M WW pin..10Since M.T .10its .TW 100 connected to the BYPASS determines how W fast the LM4810 settles operation, M . O W O W O .C Y.C value is critical when minimizing The WW .DC WW 0turn-on W slower the WWLM4810's .TW to their quiescent 100 00YoutputsMramp 0Y.C pops. W T M.T . 1 . 1 W M . voltage (nominally 1/2 VDD), the smaller theOturn-on pop. ChoosingWCW equal to.C 4.7µF along with a small W value of Y.CO O B W Y W above, Y.C .TWAs discussed Ci (in the range of 0.1µFW toW 0.47µF), a .click-less and W pop-less .shutdown function. TW .100 100 00produces M 1 W M . O W W for theOdesired bandwith helpsWminimize0clicks choosing Ci no larger than necessary .C and .pops. WW W TW 0 Y WW .100Y.C M.TW 1 M . O W O W WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C WW .100Y.C M.TW W O W WWCopyright © 2001–2013, Texas Instruments Incorporated 14 Submit Documentation Feedback WW .100Y.C M.TW O W W LM4810 Y.C Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W .C W W Y W 0 W T . 0 .T W.1 Y.COMSNAS125D OM www.ti.com – FEBRUARY 2001 – REVISED APRIL 2013 W C . W W .TW 00 .T 1 00Y M . 1 M . O W OPTIMIZING W CLICK PERFORMANCE .CO REDUCTION WW AND W YPOP WW .100Y.C M.TW 0 T . 0 M .1 O WWshutdown CO minimizes The LM4810 contains turn-onWand or “clicks and pop”. For this .that Y.Ctransients WWcircuitry W 0 Y .TW W 0 0 W T . 1 0 T M . . 1 discussion, turn-on refers to either applying the power supply voltage or when the shutdown mode is deactivated. M . O .C OM WWas unity W .CO amplifiers Y WW 0internal C W . 0 Y W T During turn-on, the LM4810's are configured gain buffers. An internal current source . W 0 0 Y W T .1 manner. 00 M. pin in a controlled, .1 the BYPASS OM W M.T up the capacitor O W on linear The gain of the internal amplifiers C . W W.1 Y.COcharges C . .TW Wunity until the 00Ysoon asMthe 0Ythe WW TWpin reachesW1/2 VDD..1As . 0 0 T remains voltage on BYPASS voltage on the BYPASS pin . 1 0 M . O 1 W M O W C . O W W. C W . Y W is stable, the device becomes fully operational. During device turn-on, a transient (pop) is created from a voltage C Y W .T W 00 Y. W .TW .100output O OM and ofM the amplifier as the voltage BYPASS pin reaches 1/2 VDD. For W.1 on the M.T between the input .100 difference W C . O W W C W . YC . Ideally, W W .C 0 Y W T W . W 0 0 Y W this discussion, the input of the amplifier refers to the node between R and the input and output track T . 1 0 I I 0 T M . O W M. applied to the W .10 the O OM turn-on, the buffer-configured W.1 pin. C . voltage BYPASS During amplifier output charges the input W W C W . Y C W . W .Tof C thereby W 00 0Y R . This W T . 1 0 WW .100Ycapacitor, T M . . 1 C , through the input resistor, input resistor delays the charging time causing the M . I I O I W Winput and .COHigher OMdifference W W C W . Y W C W . voltage between the output that results in a transient (pop). value capacitors 0 Y W T W . W Y W 00 W M current. Decreasingneed .10 with a O M.T 1/2 VDD) when W .1voltage W M.toT reach a quiescent .100more time DC (usually charged fixed the O W C . O W .C Y frequency. .TW 00-3dB WWthe turn-on TWexpense ofWthe desired RI will minimize at .the 1 00Y pops M 0Y.Cof CM WW .10value M . .TW I and 1 . W .CO .TW W .CO WWcannot Wchanging the .COthe .BYPASS 0BYalters Ybe WW W 0 0 Y W T pin current modified, size of C . 1 0 0 WW .1Although T M device's turn-on time . 0 .1 Othe W OM the value of CB W W .C OM W and the C magnitude of “clicks and pops”. Increasing reduces the magnitude . Y W C W . 0 Y W W .TWof turn-on pops. W 0 increases. 0 size of M Y this presents W as .1the Tincreases, the turn-on.1time . 0 0 W T M . 0 However, a tradeoff: C There is a linear W B M .1 W .COtimes.Tfor Obetween Wtypical Wrelationship Wvarious values .CO time. Y W C W . 0 Y W W the size of C and the turn-on Here are some turn-on W 0 0 Y W T B . 1 0 0 W T M . . 1 0 M . O 1 W M . O W of CB: O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW T0ON0Y.CO .TW W CB WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W .CO .TW WW 80ms W.1 Y.COM W0.1µF Y W 0 W W W .T 00 W .10 OM W170ms M.T 0.22µF .100 W.1 Y.COM W C . O W W W Y W C . W 270ms 0.33µF W .T WW .100Y M.T .100 .TW 100 M . O W M O W O W 0.47µF WW370ms.100Y.C M.TW W WW .100Y.C M.TW WW .100Y.C M.T0.68µF O W 490ms O W W W Y.C WW 00Y.CO .TW C . 0 W W W 0 Y W W T M.T .1 .1.0µF 920ms 1 00 M . O 1 W M . O W C O W W Y. W1.8sec .TW WW .100Y.C M.TW 100 WW .100Y.C M2.2µF M . .TW O W O W .C O 3.3µF W W 2.8sec W W W 00Y WW .100Y.C M.TW 1 WW .100Y.C M T M.T . . O W 4.7µF 3.4sec O W C O W 0Y. WW .TW WW .100Y.C M.TW WW .100Y.C 10µF M 7.7sec W.10 .TW O M O W W Y.C WW .100Y.C M.TW WW 00Y.CO .TW 0discharged WWmust.1be Tbefore . 0 M In orderW eliminate “clicks and pops”, all capacitors turn-on. Rapidly VDD may 1 M . W .CO Ofully WW switching .CO and Y W C W . 0 Y W WW .TW not allowW the capacitors to discharge, which may cause “clicks pops”. In a single-ended configuration, W 0 0 Y W T . 1 0 0 M . .T 1 0 M . O 1 W M . O WusuallyYhas the output is coupled load by CO. This capacitor value. CO discharges through .C internal W toYthe .C a high .CO WW large. .TW W of CO, the 00YTo reduce 0 time WWdischarge TW can be . 1 0 0 WW Depending T M . . 20kΩ resistors. on the size constant relatively 1 0 M . O 1 W M . W .C W W .CObe placed CO anTexternal transients in single-ended 1kΩ–5kΩ WW 00Y.mode, W 00Y 20kΩ 0Ycan WW resistor TW in parallelWwith the.1internal . 0 W M.T . 1 M . O 1 W M . resistor. The tradeoff for using this resistor is increased quiescent current. O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W AUDIO POWERWAMPLIFIER WW .100Y.C M.TW W Y.C DESIGN WW .100Y.C M.TW 0 W T . 0 O W M O W W.1 Y.COAmplifier WW .100Y.C M.TW W Design a Dual 70mW/32Ω WW .100Y.C M.TW 0 WW .10Audio T . M WW 00Y.CO .TW W WW 00Y.CO .TW CO . W W W Y W 0 W T Given: .1 W.1 Y.COM W M. .10 OM W O W W C . W C W Y W Power Output 70 .T W 00mW W WW .100Y. M.T .100 W.1 32ΩY.COM W M.T O W O W W C Load Impedance . W 00 WW .100Y .TW WW .100Y.C M.TW M.T .1(max) M O W Input Level 1 Vrms O W C . O W W Y WW .20kΩ WW .100Y.C M.TW 100 WW .100Y.C M.TW Input Impedance M.T O W O W O W W Y.C Bandwidth WW .100Y.C M.TW 100 Hz–20WkHz ± 0.50dB 100 WW .100Y.C M.TW M.T . O W O W C . O W W .C the.Tspecified Y W W .C W power. 0Yobtain The design begins by specifying minimum supply necessary output WW .the .100 .TW voltageW 10to 00Y M . 1 W M O W W W voltage One way to find the minimumWsupply Figure 27 in W Performance Characteristics. Another COis to use 0Y.C the W Typicalto .TW output W 0achieve 0Y.peak .TWvoltage necessary 1 0the M . way, using Equation 5, is W to calculate output desired power for 1 M . O O amplifier's dropout voltage, W .C WW 0two C W . Y W a given load impedance. To account for the additional voltages, based on W 0 Y W T . 0 W T 1 .result M.must .10 OM by Equation 5. For a W Figure 30 in Typical PerformanceW Characteristics, be added toW the obtained O C . C Y W is Equation Y. 6. .TW W single-ended application, the W result .100 M .100 W O W .C W WW Copyright © 2001–2013, Texas InstrumentsW Incorporated 00Y Submit Documentation Feedback 15 .TW 1 M . O W C W LM4810 Y. Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W WW .100Y.C M.TW .TW M O 2013 SNAS125D – FEBRUARY 2001 – REVISED www.ti.com WW 00Y.CO .TW .CAPRIL W Y W 0 T . 1 0 M . 1 M . O W O W WW .100Y.C M.TW WW .100Y.C M.TW (5) W W + VY.CO)) CO . W W Y W V ≥ (2V + (V (6) W 0 W T OPEAK ODBOT . WDD 0 W ODTOP .T .100 W.1 Y.COM W M.T OM voltage of 4.8V. This W O W C . W C Figure 29 indicates a minimum supply is easily met by . W T commonly used 5V supply .the 00 W .TW 1allowing 00Y M . .TW The additional 1 00Y M . O 1 W voltage. voltage creates the benefit of headroom, the LM4810 produce peak output M . W W W to voltage .CO or.Tother Y.C WWwithout W audibleWdistortion. .COpower.TinWexcess of W 0 Yclipping T . 0 0 Y 70mW The choice of supply must also not 1 0 0 M . 0 O OM power dissipationWasWexplained W.1 maximum C . OM a situation that W W.1 Y.Ccreate violates above in POWER DISSIPATION. C W . Y W Y W W 00 W M.T 100 dissipation by two since there are M.T point from Equation .power Omultiplied W.11 mustY.be M.T that the maximum .100 Remember O W C O W W C W . W C W . 0 Y W T W two independent amplifiers inside the package. Once the power dissipation equations have been addressed, the . W W .T 00 M .10 .T 1from 00Y required M . O 1 W M . O gain can be determined Equation 7. W C . O W W WW .100Y WW .100Y.C M.TW WW .100Y.C M.TW M.T O W O W (7) O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W W theY.LM4810 a minimum gain of 1.497 allows to reach full output and.C maintain low noise and THD+N O W Thus, CO WW swing .TW W this example, 00Y WWlet A.V1=1.5. .TW 1 00 0Y.C M.TFor WW .10performance. M . M WW 00Y.CO .TW W WW 00Y.CO .TW .CO .Toverall W W Y W 0 amplifiers gain is set using the input (R ) and feedback (R WW .1The MWith the desired input 0 M i Wf.1) resistors. O W.1resistor .CO .TW OM W W impedance C . set at 20kΩ, the feedback is found using Equation 8. Y W C W . 0 Y W W W 0 Y W .T W .100 W.1 Y.COM W .100 AV = ROf/RMi .T (8) OM W W W C . W C W 0 Y W T . W 0 0 Y. W T . 1 0 0 WW The T M . . 1 0 M . O W of RMis 30kΩ. W.1 value WW 00Y.CO .TW .CO f .TW WW .100Y.C M.TW Y W 0 WW The.1last 0 step inM M frequency bandwidth. .1 the −3db ±0.25dB Wamplifier's .COthe desired O this design is settingW WWTo 0achieve W .CO Y C W . 0 Y W TW the lower W . W 0 Y W pass band magnitude variation limit, the low frequency response must extend to at lease one−fifth T . 1 0 0 W T M . . 1 0 M to at least five W O W the upper M the high frequencyW W. bandwidth limit and response must times limit. The W.1 Y .COextend Y.C bandwidth W .CO 0 Y W .TW W 0 0 W T . 1 0 0 WW T M . . 1 0 gain variation for both response limits is 0.17dB, well within the ±0.25dB desired limit. The results are an M . O 1 W M O W W. .CO .TW WW .100Y.C M.TW (9) WW .100Y.C M.TW WW fL =.1100Hz/5 00Y = 20Hz O W M O W C . O W W C W . Y W .C W Wa and WW .100Y W M.T .100 .TW 00Y∗ M.T O 1 W M . O W C . O W W fH = 20kHz 5 = 100kHz W (10) Y W WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C OComponents Description, As stated with Ci, and RY Win External Worder .Cconjunction i in L,. create first W both0R WWCo with .T 0Y Y.C to obtain Wlow .TW 100both poles WW filters. M . .TWthe desired 1 00Thus highpass frequency response of 100Hz within ±0.5dB, must be M . O 1 W M . O W WWsingle .CO The.Tcombination taken into consideration. of two order a second order 0Y.C Y.C filters.TatWthe same frequency WW .1forms T WW . W 0 0 Y W 0 0 W M point. 0 M away from the single response. This inOaMsignal which is downW0.34dB filter W.1 atYfive .CO−3dB.T WWorder W.1 results W .COtimes.T Y C W . 0 W W W 0 0 Y W Thus,W a frequency to M ensure that the response.1is better than M 0.5dB 10 00of 20HzMis.Tused in the followingWequations . O 1 W . O down at 100Hz. WW .100Y.C M.TW WW 00Y.CO .TW WW .100Y.C M.TW W 1 Ci ≥ 1 / (2π OM= 0.397µF; use 0.39µF. WW 00Y.CO (11) W*. 20kΩY* .20Hz) WW 00Y.CO .TW C W W .TW W W 1 M . Co ≥W 1 / (2π * .32Ω (12) .T use 330µF. 1 00* 20Hz) =M249µF; M . O 1 W O W .C W W .CO .TW by the product WW .TW 00Yclosed-loop 0Y.C high WW of the Tfrequency . 1 0 WW .1pole The high frequency desired pole, f , and the M . 1 00Yis determined H M . O W O W .C OM W W gain, AV. WithW aW closed-loop Y.C GBWP W and fH = 100kHz, 00Y smaller 0resulting Y.Cgain of.T1.5 WW the TW = 150kHzWwhich is.1much . 0 0 W M.T 1 0 M . O than the LM4810'sWGBWP of 900kHz. This figure displays that if a designer has a need to design an amplifier W M .1 O W C . W .CO .TW Y.Cbandwidth W the LM4810 with a higherW gain, be used without WWrunning .TWlimitations.W W.100Y OM.TW 00into 1 00Y canMstill M . 1 . O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W Y W WW .100Y.C M.TW WW .100Y.C M.TW .100 W O W O W WW WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C WW .100Y.C M.TW W O W WWCopyright © 2001–2013, Texas Instruments Incorporated 16 Submit Documentation Feedback WW .100Y.C M.TW O W W LM4810 Y.C Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W .C W W Y W 0 W T . 0 .T W.1 Y.COMSNAS125D OM www.ti.com – FEBRUARY 2001 – REVISED APRIL 2013 W C . W W .TW 00 .T 1 00Y M . 1 M . O W O W Schematic Demonstration Board W Y.C WW .100Y.C M.TW 0 WW T . 0 M .1 WW 00Y.CO .TW WW 00Y.CO .TW W W W .1 W.1 Y.COM W M.T OM W O W C . W C W . Y W .T W .100 .TW 00Y M.T .100 OM W O W C . W W.1 Y.COM W C W Y W WW .100Y. .TW M.T .100 .T 00 M O 1 W M . O W C . W .CO .TW WW .100Y .TW WW .100Y.C M.TW M 00Y O 1 W M . O W WW .100Y.C M.TW WW 00Y.CO .TW WW .100Y.C M.TW 1 OM WW 00Y.CO .TW W. WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W .T WW .100Y .100 .TW 100 M . OM W M O W C . O W W C . Y W W .TW W .TW 100 00Y WW .100Y.C M.TW M . 1 M . O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM W M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W W Y W WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T W .100 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W .T W 00 W WW .100Y. M.T .100 W.1 Y.COM W M.T O W O W W C . W WW .100Y .TW WW .100Y.C M.TW M.T .100 M O W O W Figure 41. LM4810 Demonstration Board Schematic C . O W W W Y W WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C O W WW .100Y. .TW Y.C WW .100Y.C M.TW WWBoard M .TW 00Layout Demonstration O 1 W M . O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W Y W WW .100Y.C M.TW WW .100Y.C M.TW .100 W O W W .CO .TW WW WW .100Y.C M.TW WW Figure 00Y42. Recommended 1 M . PC Board Layout O W W .CO .TW Silkscreen WW .100Y.C M.TW Component-Side WW .100Y O W OM W WW .100Y.C WW .100Y.C M.TW W .CO .TW WW WW Copyright © 2001–2013, Texas InstrumentsW Incorporated 00Y Submit Documentation Feedback 17 1 M . O W C W LM4810 Y. Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W WW .100Y.C M.TW .TW M O 2013 SNAS125D – FEBRUARY 2001 – REVISED www.ti.com WW 00Y.CO .TW .CAPRIL W Y W 0 T . 1 0 M . 1 M . O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW 00Y.CO .TW WW 00Y.CO .TW W W W .1 W.1 Y.COM W M.T OM W O W C . W C W . Y W .T W .100 .TW 00Y M.T .100 OM W O W C . W W.1 Y.COM W C W Y W WW .100Y. .TW M.T .100 .T 00 M O 1 W M . O W C . W .CO .TW WW .100Y .TW WW .100Y.C M.TW M 00Y O 1 W M . O W WW .100Y.C M.TW WW 00Y.CO .TW WW .100Y.C M.TW 1 OM WW 00Y.CO .TW W. WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W .T WW .100Y .100 .TW 100 M . OM W M O W C . O Figure 43. Recommended PC Board Layout W W C . Y W W .TW W .TW 100 00YComponent-Side WW .100Y.C M.TW M . Layout 1 M . O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM W M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W W Y W WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W .C O W W W WW 00Y.COPC Board 00Y TW Layout W . 1 WW .100Y.C M.TWFigure 44.WRecommended M.T . 1 M . O W Bottom-Side Layout O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM W M.T O W O W W C . W W Y W .T W WW .100Y.C M.TW .100 M.T .100 OM W O W C . O W W C W Y W WW .100Y. .TW WW .100Y.C M.TW M.T .100 M O W O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O Recommended NGL0008B WW 00Y.CO .TW W FigureY.45. .CO Layout WW PC C Board W Y W W W 0 W T . 0 W .T 00 W.1 Y.COM W Silkreen W.1 Y.COM W W W.1 Y.COM Component-Side W W W W .T W M.T .100 .TW 100 00 M . O 1 W M . O W C . O W W WW .100Y WW .100Y.C M.TW WW .100Y.C M.TW M.T O W O W O W WW .100Y.C M.T WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO W WW 00Y.CO .TW C . W W W Y W W .1 .T 00 W.1 Y.COM W WW W.1 Y.COM W W W W 0 W .T 0 W .T 00 W.1 Y.COM W W.1 Y.COM W W W W .T W .100 M.T .100 OM W O W C . W C Y W W WW .100Y. .100 M.T W O W WWCopyright © 2001–2013, Texas Instruments Incorporated 18 Submit Documentation Feedback WW .100Y.C M.TW O W W LM4810 Y.C Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W .C W W Y W 0 W T . 0 .T W.1 Y.COMSNAS125D OM www.ti.com – FEBRUARY 2001 – REVISED APRIL 2013 W C . W W .TW 00 .T 1 00Y M . 1 M . O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW 00Y.CO .TW WW 00Y.CO .TW W W W .1 W.1 Y.COM W M.T OM W O W C . W C W . Y W .T W .100 .TW 00Y M.T .100 OM W O W C . W W.1 Y.COM W C W Y W WW .100Y. .TW M.T .100 .T 00 M O 1 W M . O W C . W .CO .TW WW .100Y .TW WW .100Y.C M.TW M 00Y O 1 W M . O W WW .100Y.C M.TW WW 00Y.CO .TW WW .100Y.C M.TW 1 OM WW 00Y.CO .TW W. WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . WPC Board 0 W Figure 46. .T NGL0008B WW .100Y .100LayoutOM.T .TW 10Recommended M . W M O W O W Layout .C W WW .100Y.C M.TW WW .100YComponent-Side T . WW .100Y.C M.TW M O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W 0 W .1 W.1 Y.COM W M.T .10 OM W O W W C . W C W Y W .T W W WW .100Y. .100 M.T .100 OM W M.T O W C . O W W C W Y W WW .100Y. .TW WW .100Y.C M.TW M.T .100 M O W O W C . O W WW .100Y .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W W .T WW .100Y M.T .100 .TW 100 M . O W M O W C O W .C W Board Layout WW .100Y. .TW WW .100YNGL0008B .TPC WW .100Y.C M.Figure TW 47. Recommended M M O W O W O W Bottom-Side .CLayout WW .100Y.C M.TW WW .TW 00Y WW .100Y.C M.TW 1 M . O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T W .100 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W .T W 00 W WW .100Y. M.T .100 W.1 Y.COM W M.T O W O W W C . W WW .100Y .TW WW .100Y.C M.TW M.T .100 M O W O W C . O W W W Y W WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W Y W WW .100Y.C M.TW WW .100Y.C M.TW .100 W O W O W WW WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C WW .100Y.C M.TW W .CO .TW WW WW Copyright © 2001–2013, Texas InstrumentsW Incorporated 00Y Submit Documentation Feedback 19 1 M . O W C W LM4810 Y. Folder.TLinks: WW .100Product M O W WW .100Y.C O W Y.C 0 0 1 M.T . O W C . W WW .100Y LM4810 M.T O W WW .100Y.C M.TW .TW M O 2013 SNAS125D – FEBRUARY 2001 – REVISED www.ti.com WW 00Y.CO .TW .CAPRIL W Y W 0 T . 1 0 M . 1 M . W O W .CO .TW HISTORY WW 00Y WW .100Y.C M.TW REVISION 1 M . W O W .CO .TW W C . Y W W 0 Y W W from Revision 0 W C (April Changes D Page .T .100 2013)OtoMRevision W.1 Y.COM W M.T W O W C . W C W .......................................................................................................... . W .T 00YSheet toMTI.Tformat .100 • Changed of National.1Data 19 .TW layout W 00Y OM W O W C . W W.1 Y.COM W C W . Y W W 0 Y W T . 0 W .T 00 .T 00 W.1 Y.COM W W.1 Y.COM W W W.1 Y.COM W W W .T 00 W M.T .100 W.1 Y.COM W M.T .100 O W O W W C . .C W W WW .100Y .TW M.T .100 .TW 00Y M O 1 W M . O W C . O W W WW .100Y WW .100Y.C M.TW WW .100Y.C M.TW M.T O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W 0 W .T 0 W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T W .100 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W .T W W WW .100Y. .100 M.T .100 OM W M.T O W C . O W W C W Y W WW .100Y. .TW WW .100Y.C M.TW M.T .100 M O W O W C . O W WW .100Y .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W W .T WW .100Y M.T .100 .TW 100 M . O W M O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T W .100 W.1 Y.COM W M.T .100 OM W O W W C . W C W Y W .T W 00 W WW .100Y. M.T .100 W.1 Y.COM W M.T O W O W W C . W WW .100Y .TW WW .100Y.C M.TW M.T .100 M O W O W C . O W W W Y W WW .100Y.C M.TW WW .100Y.C M.TW M.T .100 O W O W C O W WW .100Y. .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W .T 00 W W.1 Y.COM W M.T .100 W.1 Y.COM W O W W W C . W .T W 00 W WW .100Y M.T .100 W.1 Y.COM M.T O W O W W C . W W WW .100Y WW .100Y.C M.TW M.T .100 M.T O W O W C . O W W Y W WW .100Y.C M.TW WW .100Y.C M.TW .100 W O W O W WW WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C M.TW WW .100Y.C M.TW O W O W WW .100Y.C WW .100Y.C M.TW W O W WWCopyright © 2001–2013, Texas Instruments Incorporated 20 Submit Documentation Feedback WW .100Y.C M.TW O W W LM4810 Y.C Folder.TLinks: WW .100Product M O W WW .100Y.C . W W .T W 00Y .100 .TW 1 M.T . OM W M O W C . O W C W Y .C W WW .100Y. .TW M.T PACKAGE OPTION ADDENDUM .100 .TW 00Y M O 1 W M . O W C . O W WW .100Y .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C www.ti.com . W W 11-Apr-2013 W Y W W M .1 W.1 Y.COM W M.T .100 O W O W W C . W W Y W W WW .100Y.C M.TW M.T .100 M.T .100 O W O W C . O W W C PACKAGING INFORMATION W Y W WW .100Y. .TW WW .100Y.C M.TW M.T .100 M O W O W C O W W (°C) .C Y. W Package WW MSL.Peak .TTemp Orderable Device Type PackageWPins Lead/Ball Finish Op Top-Side Markings Samples .TW 100 Temp OM 00Y Eco Plan 0Y.C Package WW .10Status .TW 1 M . W M O Drawing Qty W C (1) (2) (3) (4) . O W W C Y W .C Y. .TtoW85 .TW CU SN WLevel-1-260C-UNLIM WW .ACTIVE M-40 .100 .TW DGK W8 W 100 Green O 00Y LM4810MM/NOPB VSSOP 1000 (RoHS G10 M . O 1 W M C O W W W .CSb/Br) .TW Y. W C . &Yno 0 W T W . W 0 0 Y W 0 W .T W.1 Y.COM .100 OM W.1 Green LM4810MMX/NOPB ACTIVE VSSOP DGK 8 W 3500 (RoHS CU SN Level-1-260C-UNLIM -40 to 85 G10 OM W W C . C W . Y W W .TW W 00 Y W 1 0 0 W T &0no Sb/Br) M.T M . . 1 0 . O 1 W M . O W WW .100Y.C M.TW WW 00Y.CO .TW WW .100Y.C M.TW W (1) O The marketing status values are defined W .1as follows: OM WW 00Y.CO .TW .C WW .100Y.C M.TW WWfor new ACTIVE: Product device recommended designs. W Y W 0 W T . 0 LIFEBUY: TI has announced that the device OM Wis.1in effect. OM and a lifetime-buy period WW 00Y.CO .TW W.1will beYdiscontinued, .TICdoes W C W . Y W W W 0 W T NRND: Not recommended for new designs. Device is in production to support existing customers, but not recommend using this part in.1a new design. M . W 00in production. M .10 O W M.TSamples may or may not .1not W PREVIEW: Device has been announced but is be available..CO O W W W C W .device. 0Y.C M.TW Y W W W 0 0 Y W T . OBSOLETE: TI has discontinued the of the 1 0 0 Wproduction T . . 0 M .1 WW 00Y.CO .TW W.1 Y.COM W WW 00Y.CO .TW W W W 0 W .1 (2) W.1 Y.COM Wfor the latest availability M.TPb-Free (RoHS Exempt), .10Pb-Free (RoHS), O&M W Eco Plan - The planned eco-friendly classification: or Green (RoHS no Sb/Br) - please check http://www.ti.com/productcontent O W W C . W C W . Y W .T W W WW information and additional product content details. 100Y .100 M.T .100 OM W . been defined.OM.T O W C . W W C TBD: The Pb-Free/Green conversion plan has not W W W Y. W W 00Y .TRoHS 0Y.C M.T the requirement that .TWproducts thatW Pb-Free (RoHS): TI's terms "Lead-Free"W or "Pb-Free" semiconductor are compatible requirements for W all .61substances, including 100with theOcurrent 0mean M . O 1 M . W C . lead not exceed 0.1% by weight in homogeneous materials. Where to be soldered at W TI Pb-FreeW are suitable in specified lead-free .COdesigned 0Y WW for use WW .TWprocesses. 0Y.Cused W high temperatures, .T products 12)0lead-based 0bumps M . .TW 1 00Y forM M . Pb-Free (RoHS Exempt): This componentW has a RoHS exemption either 1) lead-based flip-chip solder between the die and package, or die adhesive used between O 1 W . O W .C Y.C WW above. the die and leadframe. The component is otherwise considered Pb-Free compatible) as defined W .CO (RoHS 0 Y W WW .TW W 0 0 Y W T . 1 0 0 W T M . . 1 0 (RoHSM M . O 1 Green (RoHS & no Sb/Br): TI defines "Green" to mean.Pb-Free compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed W O W W W0.1% by weight Y.C WW 00Y.CO .TW C . 0 W T W in homogeneous material) . W 0 Y W W M .1 .T 00 W.1 Y.COM W WW 00Y.CO .TW W.1 Y.COM W W W W W 00 W (3) .T industry standard 00 M.Tsolder temperature. WW.1 OM MJEDEC .1according MSL, Peak Temp. -- The Moisture Sensitivity Level rating toO the classifications, Opeak W.1 Y.and C . W C W Y W C W . 0 W W .T WW .100Y M.T .10 .TW 100 M . O W M O W C O W (4) .C Y. W WW Multiple Top-Side Markings will be inside parentheses. Only one0Top-Side parentheses and "~" will appearW on a device. then it is a .TW Wcontained inW Y.C Marking 10If0a line isOindented 00YseparatedMby.TaW W T M . . 1 0 . 1 W M . continuation of the previous line and the two combined represent the entire Top-Side Marking for that device.W O C . O W W C W Y W WW .100Y. .TW WW .100Y.C M.TW M.T .100 M O W O W C . W C that it isTprovided. Y Wbelief as 0of0the Important Information and Disclaimer:The information provided page representsW TI's knowledgeW and TI bases its knowledge and belief on.information .CO Y.date WW TW . W 100parties. WW on1this M . .T 1 0to0Y M . O provided by third parties, and makes no representation or warranty.as the accuracy of such information. Efforts are underway to better integrate information from third TI has taken and W M O W W W .Ctesting or.Tchemical Y.C and chemicals. WW destructive W .CO but 0 Y W W continues to take reasonable steps to provide representative and accurate information may not have conducted analysis on incoming materials W 0 0 Y W 1 0 0 W T M.T . . and other limited information 1may not be O 0 CAS numbers M . O 1 W M . TI and TI suppliers consider certain information to be proprietary, and thus available for release. W C . O W WW .100Y .TW WW .100Y.C M.TW WW .100Y.C M.TW M O W O .C O W purchase WinWthis document In no event shall TI's liability arising out of such information exceed issue by T TIW to Customer onW anW annual basis. .TW W TI part(s) atW 00Y 0Y.C soldM Y.C price .ofTthe . 1 0 0 WWthe total M . 1 0 . O 1 W O W OM W. WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O W O W O W WW .100Y.C M.TW WW .100Y.C M.TW WW .100Y.C M.TW O WW 00Y.CO .TW W WW 00Y.CO .TW C . W W W Y W W .1 W.1 Y.COM M.T .100 OM W O W W C . W C W Y W 1 W W WW .100Y. Addendum-Page .100 M.T .100 W M.T O W O W W C W W W 0Y. Y.C WW .TW O W Y.C 0 0 1 M.T . O W C . W WW .100Y M.TMATERIALS INFORMATION PACKAGE O W WW .100Y.C M.TW .TW M WW 00Y.CO .TW .CO .TW Y W www.ti.com 8-Apr-2013 0 0 W.1 Y.COM W W.1 Y.COM W W W W .T W .100 M.T .100 OM W O W C . W C W Y TAPE AND REEL Y. W WW INFORMATION .TW M.T .100 .TW 100 M . O W M O W C .CO .TW WW .100Y. .TW WW .100Y.C M.TW M 00Y O 1 W M . 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Buyers areYresponsible their products and WW W.1 YTI .CorOthe design WWassistance C W . 0 Y W TW W W 0 0 W T . W minimize associated with Buyers’ products.1and applications, should provide M Buyers .Tusing TI components. ToW 10 the risks 00 applications M . O 1 W M . O .C O design and operating safeguards. W adequate W C W . Y W C W . 0 Y W T W . W 0 Y W M copyright, mask work right, or .T or representWthat any M.T or implied, is grantedWunder .100 eitherOexpress license, right, O W.1any patent Mwarrant .100 TI doesOnot Wany C . W C . Y W C W . other intellectual property right relating to combination, machine, or process in which TI components or services 0 Y W .TWare used. Information Y W T .not 10 WW .100published TW M 1or00servicesO M . 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Buyer represents andWagrees . providedOby W that itYhas thatW all the necessary expertise toW and implement .C safeguards W which .CO Wthecreate W may bedangerous .T W of failures, 00ofYfailures that 0 and Y.C consequences Wmonitor failures TW their consequences, lessen likelihood might cause . 1 0 0 Wanticipate T M . . 1 0 M . O out of the use W Mremedial actions. BuyerW O harm W and.1take appropriate willW fully indemnify representatives against W .COin safety-critical 0Y.C arising Y.C TI and its WW any.1damages .TW W 0 0 Y W T . of W any TI components applications. 0 0 W T M . 1 0 M . O 1 W M . W such components, W Wis to .COsafety-related Y.C TI’s.T WW to0facilitate In some cases, TI Y components promoted specifically goal W applications. .CO .may WWith Wbecreate 00standards 0Ysolutions W Tmeet . 1 0 WW T M . 1 0 help enable .customers to design and their own end-product that applicable functional safety and M . 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Lm4810 Dual 105mw Headphone Amplifier With Active

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