Transcript
a FEATURES High Common-Mode Rejection DC: 100 dB typ 60 Hz: 100 dB typ 20 kHz: 70 dB typ 40 kHz: 62 dB typ Low Distortion: 0.001% typ Fast Slew Rate: 9.5 V/ms typ Wide Bandwidth: 3 MHz typ Low Cost Complements SSM2142 Differential Line Driver APPLICATIONS Line Receivers Summing Amplifiers Buffer Amplifiers–Drives 600 V Load
High Common-Mode Rejection Differential Line Receiver SSM2141 FUNCTIONAL BLOCK DIAGRAM
25kΩ
25kΩ
–IN 2
5 SENSE
7 +VCC
SSM2141
6 OUTPUT
4 –VEE 25kΩ
25kΩ
+IN 3
1 REFERENCE
PIN CONNECTIONS
GENERAL DESCRIPTION
The SSM2141 is an integrated differential amplifier intended to receive balanced line inputs in audio applications requiring a high level of noise immunity and optimum common-mode rejection. The SSM2141 typically achieves 100 dB of commonmode rejection (CMR), whereas implementing an op amp with four off-the-shelf precision resistors will typically achieve only 40 dB of CMR—inadequate for high-performance audio.
8-Pin Plastic Mini-DIP (P Suffix) Narrow Body SO (S Suffix) 8 NC
REFERENCE 1 –IN 2
SSM2141
7 V+
6 OUTPUT TOP VIEW (Not to Scale) 5 SENSE V– 4
+IN 3
NC = NO CONNECT
The SSM2141 achieves low distortion performance by maintaining a large slew rate of 9.5 V/µs and high open-loop gain. Distortion is less than 0.002% over the full audio bandwidth. The SSM2141 complements the SSM2142 balanced line driver. Together, these devices comprise a fully integrated solution for equivalent transformer balancing of audio signals without the problems of distortion, EMI fields, and high cost. Additional applications for the SSM2141 include summing signals, differential preamplifiers, and 600 Ω low distortion buffer amplifiers. For similar performance with G = 1/2, see SSM2143.
REV. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
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SSM2141* Product Page Quick Links Last Content Update: 11/01/2016
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• • • •
Documentation Application Notes • AN-938: Digital and Analog Measurement Units for Digital CMOS Microphone Preamplifier ASICs Data Sheet • SSM2141: High Common-Mode Rejection Differential Line Receiver Data Sheet
SSM2141 Material Declaration PCN-PDN Information Quality And Reliability Symbols and Footprints
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SSM2141–SPECIFICATIONS ELECTRICAL CHARACTERISTICS
(@ VS = 618 V, TA = +258C, unless otherwise noted)
Parameter
Symbol
Conditions
Min
OFFSET VOLTAGE
VOS
VCM = 0 V
–1000
No Load, VIN = ± 10 V, RS = 0 Ω
GAIN ERROR INPUT VOLTAGE RANGE
IVR
(Note 1)
± 10
COMMON-MODE REJECTION
CMR
VCM = ± 10 V
80
POWER SUPPLY REJECTION RATIO
PSRR
VS = ± 6 V to ± 18 V
OUTPUT SWING
VO
RL = 2 kΩ
± 13
SHORT-CIRCUIT CURRENT LIMIT
ISC
Output Shorted to Ground
+45/–15
SMALL-SIGNAL BANDWIDTH (–3 dB)
BW
RL = 2 kΩ
SLEW RATE
SR
RL = 2 kΩ
THD
SSM2141 Typ Max
Units
1000
µV
0.001 0.01
%
25
V 100 0.7
dB 15
± 14.7
µV/V V mA
3
MHz
9.5
V/µs
RL = 100 kΩ RL = 600 Ω
0.001 0.01
%
CAPACITIVE LOAD DRIVE CAPABILITY CL
No Oscillation
300
pF
SUPPLY CURRENT
No Load
2.5
3.5
mA
TOTAL HARMONIC DISTORTION
ISY
6
NOTES 1 Input Voltage Range Guaranteed by CMR test. Specifications subject to change without notice
ELECTRICAL CHARACTERISTICS (@ V = 618 V, –408C ≤ T ≤ +858C) S
A
Parameter
Symbol
Conditions
Min
Typ
Max
Units
OFFSET VOLTAGE
VOS
VCM = 0 V
–2500
200
2500
µV
0.002 0.02
%
No Load, VIN = ± 10 V, RS = 0 Ω
GAIN ERROR INPUT VOLTAGE RANGE
IVR
(Note 1)
± 10
COMMON-MODE REJECTION
CMR
VCM = ± 10 V
75
POWER SUPPLY REJECTION RATIO
PSRR
VS = ± 6 V to ± 18 V
OUTPUT SWING
VO
RL = 2 kΩ
SLEW RATE
SR
SUPPLY CURRENT
ISY
V 90 1.0
± 13
dB 20
µV/V
± 14.7
V
RL = 2 kΩ
9.5
V/µs
No Load
2.6
4.0
mA
NOTES 1 Input Voltage Range Guaranteed by CMR test. Specifications subject to change without notice
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REV. C
SSM2141 ABSOLUTE MAXIMUM RATINGS 1
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 18 V Input Voltage1 . . . . . . . . . . . . . . . . . . . . . . . . Supply Voltage Output Short-Circuit Duration . . . . . . . . . . . . . . Continuous Storage Temperature Range P Package . . . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C Lead Temperature (Soldering, 60 sec) . . . . . . . . . . . . +300°C Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . +150°C Operating Temperature Range . . . . . . . . . . . . –40°C to +85°C
Package Type
uJA2
uJC
Units
8-Pin Plastic DIP (P)
103
43
°C/W
NOTES 1 For supply voltages less than ± 18 V, the absolute maximum input voltage is equal to the supply voltage. 2 θJA is specified for worst case mounting conditions, i.e., θJA is specified for device in socket for P-DIP package.
Typical Performance Characteristics
REV. C
Small Signal Transient Response
Large Signal Transient Response
Common-Mode Rejection vs. Frequency
Power Supply Rejection vs. Frequency
Total Harmonic Distortion vs. Frequency
Dynamic Intermodulation Distortion vs. Frequency
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SSM2141–Typical Performance Characteristics
Input Offset Voltage vs. Temperature
Closed-Loop Gain vs. Frequency
Gain Error vs. Temperature
Slew Rate vs. Temperature
Supply Current vs. Supply Voltage
Maximum Output Voltage vs. Output Current (Source)
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Closed-Loop Output Impedance vs. Frequency
Supply Current vs. Temperature
Maximum Output Voltage vs. Output Current (Sink)
REV. C
SSM2141 1S
5mV
+1µV 0V –1µV
0.1 TO 10Hz PEAK-TO-PEAK NOISE
Low Frequency Voltage Noise
Voltage Noise Density vs. Frequency
2mS
10mV
1mS
10mV
+10µV
+10µV
0V
0V
–10µV
–10µV TA = +25°C
TA = +25°C
VS = ±15V
VS = ±15V
NOTE: EXTERNAL AMPLIFIER GAIN = 1000; THEREFORE, VERTICAL SCALE = 10µV/DIV.
NOTE: EXTERNAL AMPLIFIER GAIN = 1000; THEREFORE, VERTICAL SCALE = 10µV/DIV.
Voltage Noise from 0 kHz to 10 kHz
Voltage Noise from 0 kHz to 1 kHz
APPLICATIONS INFORMATION
The SSM2141 represents a versatile analog building block. In order to capitalize on fast settling time, high slew rate, and high CMR, proper decoupling and grounding techniques must be employed. For decoupling, place 0.1 µF capacitor located within close proximity from each supply pin to ground.
Slew Rate Test Circuit
REV. C
–5–
SSM2141 MAINTAINING COMMON-MODE REJECTION
In order to achieve the full common-mode rejection capability of the SSM2141, the source impedance must be carefully controlled. Slight imbalances of the source resistance will result in a degradation of DC CMR—even a 5 Ω imbalance will degrade CMR by 20 dB. Also, the matching of the reactive source impedance must be matched in order to preserve the CMRR over frequency.
Figure 5. Suitable Instrumentation Amplifier Requirements can be Addressed by Using an Input Stage Consisting of A1, A2, R1 and R2
Figure 1. Precision Difference Amplifier. Rejects [E1 + E 2 ] Common-Mode Signal = by 100 dB
2
Figure 2. Precision Unity Gain Inverting Amplifier
Figure 3. Precision Summing Amplifier
Figure 4. Precision Summing Amplifier with Gain
–6–
REV. C
SSM2141 OUTLINE DIMENSIONS 0.400 (10.16) 0.365 (9.27) 0.355 (9.02) 8
5
1
4
0.280 (7.11) 0.250 (6.35) 0.240 (6.10)
0.325 (8.26) 0.310 (7.87) 0.300 (7.62)
0.100 (2.54) BSC
0.060 (1.52) MAX
0.210 (5.33) MAX 0.015 (0.38) MIN
0.150 (3.81) 0.130 (3.30) 0.115 (2.92)
SEATING PLANE
0.022 (0.56) 0.018 (0.46) 0.014 (0.36)
0.195 (4.95) 0.130 (3.30) 0.115 (2.92)
0.015 (0.38) GAUGE PLANE
0.014 (0.36) 0.010 (0.25) 0.008 (0.20) 0.430 (10.92) MAX
0.005 (0.13) MIN 0.070 (1.78) 0.060 (1.52) 0.045 (1.14)
070606-A
COMPLIANT TO JEDEC STANDARDS MS-001 CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. CORNER LEADS MAY BE CONFIGURED AS WHOLE OR HALF LEADS.
Figure 6. 8-Lead Plastic Dual In-Line Package [PDIP] Narrow Body (N-8) Dimensions shown in inches and (millimeters)
5.00 (0.1968) 4.80 (0.1890)
1
5 4
1.27 (0.0500) BSC 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 0.10 SEATING PLANE
6.20 (0.2441) 5.80 (0.2284)
1.75 (0.0688) 1.35 (0.0532)
0.51 (0.0201) 0.31 (0.0122)
0.50 (0.0196) 0.25 (0.0099) 8° 0° 0.25 (0.0098) 0.17 (0.0067)
1.27 (0.0500) 0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-012-AA CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
Figure 7.8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) Dimensions shown in millimeters and (inches)
REV. C
–7–
45°
012407-A
8
4.00 (0.1574) 3.80 (0.1497)
SSM2141 ORDERING GUIDE Model1 SSM2141PZ SSM2141SZ SSM2141SZ-REEL 1
Temperature Range −40°C ≤ TA ≤ +85°C −40°C ≤ TA ≤ +85°C −40°C ≤ TA ≤ +85°C
Package Description 8-Lead PDIP 8-Lead SOIC_N 8-Lead SOIC_N
Package Option N-8 R-8 R-8
Z = RoHS Compliant Part.
REVISION HISTORY 6/11—Rev. B to Rev. C Updated Outline Dimensions ......................................................... 7 Changes to Ordering Guide ............................................................ 8 5/91—Rev. A to Rev. B
©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D10008-0-6/11(C)
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REV. C
