Transcript
Distributor of Maxim Integrated: Excellent Integrated System Limited Datasheet of MAX2077CTN+ - IC OCT ULTRASOUND FRONTEND 56QFN Contact us:
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Distributor of Maxim Integrated: Excellent Integrated System Limited Datasheet of MAX2077CTN+ - IC OCT ULTRASOUND FRONTEND 56QFN Contact us:
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19-4696; Rev 1; 9/09
Octal-Channel Ultrasound Front-End Features o 8 Full Channels of LNA, VGA, and AAF in a Small, 8mm x 8mm, 56-Pin or 10mm x 10mm, 68-Pin TQFN Package o Ultra-Low Full-Channel Noise Figure of 2.4dB at RIN = RS = 200Ω o Low Output-Referred Noise of 23nV/√Hz at 5MHz, 20dB Gain, Yielding a Broadband SNR of 68dB* for Excellent Second-Harmonic Imaging o High Near-Carrier SNR of 140dBc/Hz at 1kHz Offset from a 5MHz, 1VP-P Output Signal, and 20dB of Gain for Excellent Low-Velocity PW and Color-Flow Doppler Sensitivity in a High-Clutter Environment o Ultra-Low Power 64.8mW per Full-Channel (LNA, VGA, and AAF) Normal Imaging Mode o Selectable Active Input-Impedance Matching of 50Ω, 100Ω, 200Ω, and 1kΩ o Wide Input-Voltage Range of 330mVP-P in High LNA Gain Mode and 550mVP-P in Low LNA Gain Mode o Integrated Selectable 3-Pole 9MHz, 10MHz, 15MHz, and 18MHz Butterworth AAF o Fast-Recovery, Low-Power Modes (< 2µs) o Pin Compatible with the MAX2078 Ultrasound Front-End with CW Doppler (MAX2077 68-Pin Package Variant)
Applications
Ordering Information
Medical Ultrasound Imaging Sonar
PART MAX2077CTN+
Pin Configurations and Typical Application Circuits appear at end of data sheet.
TEMP RANGE 0°C to +70°C
PIN-PACKAGE 56 Thin QFN-EP**
MAX2077CTK+ 0°C to +70°C 68 Thin QFN-EP** +Denotes a lead(Pb)-free/RoHS-compliant package. **EP = Exposed pad.
*When coupled with the MAX1437B ADC.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX2077
General Description The MAX2077 octal-channel ultrasound front-end is a fully integrated, bipolar, high-density, octal-channel ultrasound receiver optimized for low-cost, high-channel count, high-performance portable and cart-based ultrasound systems. The easy-to-use IC allows the user to achieve high-end 2D and PW imaging capability using substantially less space and power. The highly compact imaging receiver lineup, including a low-noise amplifier (LNA), variable-gain amplifier (VGA), and antialias filter (AAF), achieves an ultra-low 2.4dB noise figure at RS = RIN = 200Ω at a very low 64.8mW perchannel power dissipation. The full imaging receiver channel has been optimized for second-harmonic imaging with -64dBFS second-harmonic distortion performance with a 1VP-P 5MHz output signal and broadband SNR of > 68dB* at 20dB gain. The bipolar front-end has also been optimized for excellent lowvelocity PW and color-flow Doppler sensitivity with an exceptional near-carrier SNR of 140dBc/Hz at 1kHz offset from a 5MHz 1VP-P output clutter signal. The MAX2077 octal-channel ultrasound front-end is available in a small 8mm x 8mm, 56-pin thin QFN or 10mm x 10mm, 68-pin thin QFN package with an exposed pad and is specified over a 0°C to +70°C temperature range. To add CW Doppler capability, replace the MAX2077 with the MAX2078.
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MAX2077
Octal-Channel Ultrasound Front-End ABSOLUTE MAXIMUM RATINGS VCC_ to GND .........................................................-0.3V to +5.5V VCC2 - VCC1 ......................................................................> -0.3V ZF_, IN_, AG to GND ................................-0.3V to (VCC_ + 0.3V) INC_ ..............................................................................20mA DC VREF to GND.............................................................-0.3V to +3V IN_ to AG ...............................................................-0.6V to +0.6V OUT_, DIN, DOUT, VG_, NP, CS, CLK, PD to GND ..........................................-0.3V to (VCC1 + 0.3V) VCC_, VREF analog and digital control signals must be applied in this order Input Differential Voltage ................................2.0VP-P differential
Continuous Power Dissipation (TA = +70°C) 56-Pin TQFN (derate 47.6mW/°C above +70°C) ..............3.8W 68-Pin TQFN (derate 40.0mW/°C above +70°C) ..............4.0W Operating Temperature Range (Note 1).................0°C to +70°C Junction Temperature ......................................................+150°C θJC (Notes 2, 3) (56-Pin TQFN) ..........................................1°C/W θJC (Notes 2, 3) (68-Pin TQFN) .......................................0.3°C/W θJA (Notes 3, 4) (56-Pin TQFN) ........................................21°C/W θJA (Notes 3, 4) (68-Pin TQFN) ........................................20°C/W Storage Temperature Range .............................-40°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C
Note 1: TC is the temperature on the exposed pad of the package. TA is the ambient temperature of the device and PCB. Note 2: Junction temperature TJ = TC + (θJC x VCC x ICC). This formula can only be used if the component is soldered down to a printed circuit board pad containing multiple ground vias to remove the heat. The junction temperature must not exceed 150°C. Note 3: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. Note 4: Junction temperature TJ = TA + (θJA x VCC x ICC), assuming there is no heat removal from the exposed pad. The junction temperature must not exceed 150°C. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS (Typical Application Circuits, VREF = 2.475V to 2.525V, VCC1 = 3.13V to 3.47V, VCC2 = 4.5V to 5.25V, TA = 0°C to +70°C, VGND = 0V, NP = 0, PD = 0, no RF signals applied. Typical values are at VCC1 = 3.3V, VCC2 = 4.75V, TA = +25°C, unless otherwise noted.) (Note 5) MIN
TYP
MAX
UNITS
3.3V Supply Voltage
PARAMETER
SYMBOL VCC1
CONDITIONS
3.13
3.3
3.47
V
4.75V/5V Supply Voltage
VCC2
4.5
4.75
5.25
V
External Reference Voltage Range
VREF
2.525
V
CMOS Input High Voltage
VIH
Applies to CMOS control inputs
CMOS Input Low Voltage
VIL
Applies to CMOS control inputs
0.8
V
CMOS Input Leakage Current
I IN
0V to 3.3V
10
μA
(Note 6)
2.475 2.5
V
Data Output High Voltage
DOUT_HI
10M load
VCC1
Data Output Low Voltage
DOUT_LO
10M load
0
V V
4.75V/5V Supply Standby Current
I_NP_5V_TOT
NP = 1, all channels
3.9
6
mA
3V Supply Standby Current
I_NP_3V_TOT
NP = 1, all channels
1.7
3
mA
4.75V/5V Power-Down Current
I_PD_5V_TOT
PD = 1, all channels (Note 7)
0.4
10
μA
3V Power-Down Current
I_PD_3V_TOT
PD = 1, all channels (Note 7)
0.3
10
μA
3V Supply Current per Channel
I_3V_NM
Total I divided by 8, VG+ - VG- = -2V
11
18
mA
4.75V/5V Supply Current per Channel
I_5V_NM
Total I divided by 8
6.0
8.3
mA
64.8
105
mW
DC Power per Channel Differential Analog Control Voltage Range
2
P_NM VGAIN_RANG
VG+ - VG-
±3
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V
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Octal-Channel Ultrasound Front-End (Typical Application Circuits, VREF = 2.475V to 2.525V, VCC1 = 3.13V to 3.47V, VCC2 = 4.5V to 5.25V, TA = 0°C to +70°C, VGND = 0V, NP = 0, PD = 0, no RF signals applied. Typical values are at VCC1 = 3.3V, VCC2 = 4.75V, TA = +25°C, unless otherwise noted.) (Note 5) PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Common-Mode Voltage for Difference Analog Control
VGAIN_COMM
(VG+ + VG-)/2
1.65 ±5%
Source/Sink Current for Gain Control Pins
I_ACONTROL
Per pin
±1.6
±4
μA
9.7
13
μA
Reference Current
IREF
Output Common-Mode Level
All channels
VCMO
V
1.73
V
AC ELECTRICAL CHARACTERISTICS (Typical Application Circuits, VREF = 2.475V to 2.525V, VCC1 = 3.13V to 3.47V, VCC2 = 4.5V to 5.25V, TA = 0°C to +70°C, VGND = 0V, NP = 0, PD = 0, D3/D2/D1/D0 = 1/0/1/0 (RIN = 200Ω, LNA gain = 18.5dB), D5/D4 = 1/1 (fC = 18MHz), fRF = 5MHz, RS = 200Ω, capacitance to GND at each of the VGA differential outputs is 25pF, differential capacitance across VGA outputs is 15pF, RL = 1kΩ differential, reference noise less than 10nV/√Hz from 1kHz to 20MHz, DOUT loaded with 10MΩ and 60pF. Typical values are at VCC1 = 3.3V, VCC2 = 4.75V, TA = +25°C, unless otherwise noted.) (Note 5) PARAMETER
CONDITIONS D1/D0 = 0/0, RIN = 50, fRF = 2MHz
Input Impedance
MIN
TYP
MAX
47.5
50
60
D1/D0 = 0/1, RIN = 100, fRF = 2MHz D1/D0 = 1/0, RIN = 200, fRF = 2MHz
90
100
115
185
200
220
D1/D0 = 1/1, RIN = 1000, fRF = 2MHz
600
830
1000
UNITS
RS = RIN = 50, LNA gain = 18.5dB, VG+ - VG- = +3V
4.5
RS = RIN =100, LNA gain = 18.5dB, VG+ - VG- = +3V RS = RIN = 200, LNA gain = 18.5dB, VG+ - VG- = +3V
3.4 2.4
RS = RIN = 1000, LNA gain = 18.5dB, VG+ - VG- = +3V
2.2
Low-Gain Noise Figure
D3/D2/D1/D0 = 0/0/0/1, LNA gain = 12.5dB, RS = RIN = 200, VG+ - VG- = +3V
3.9
Input-Referred Noise Voltage
D3/D2/D1/D0 = 1/1/1/0
0.9
nV/Hz
Input-Referred Noise Current
D3/D2/D1/D0 = 1/1/1/0
2.1
pA/Hz
Noise Figure
dB
dB
Maximum Gain, High Gain Setting VG+ - VG- = +3V
41
42.4
45
dB
Minimum Gain, High Gain Setting
VG+ - VG- = -3V
9
10.1
12
dB
Maximum Gain, Low Gain Setting
D3/D2/D1/D0 = 0/0/0/1, RIN = 200, LNA gain = 12.5dB, VG+ - VG- = +3V
35
37.6
39
dB
Minimum Gain, Low Gain Setting
D3/D2/D1/D0 = 0/0/0/1, RIN = 200, LNA gain = 12.5dB, VG+ - VG- = -3V
3
5.4
8
dB
Anti-Aliasing Filter 3dB Corner Frequency Gain Range
D5/D4 = 0/0, fC = 9MHz
9
D5/D4 = 0/1, fC = 10MHz
10
D5/D4 = 1/0, fC = 15MHz
15
D5/D4 = 1/1, fC = 18MHz VG+ - VG- = -3V to +3V
18 33
MHz
dB
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3
MAX2077
DC ELECTRICAL CHARACTERISTICS (continued)
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MAX2077
Octal-Channel Ultrasound Front-End AC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuits, VREF = 2.475V to 2.525V, VCC1 = 3.13V to 3.47V, VCC2 = 4.5V to 5.25V, TA = 0°C to +70°C, VGND = 0V, NP = 0, PD = 0, D3/D2/D1/D0 = 1/0/1/0 (RIN = 200Ω, LNA gain = 18.5dB), D5/D4 = 1/1 (fC = 18MHz), fRF = 5MHz, RS = 200Ω, capacitance to GND at each of the VGA differential outputs is 25pF, differential capacitance across VGA outputs is 15pF, RL = 1kΩ differential, reference noise less than 10nV/√Hz from 1kHz to 20MHz, DOUT loaded with 10MΩ and 60pF. Typical values are at VCC1 = 3.3V, VCC2 = 4.75V, TA = +25°C, unless otherwise noted.) (Note 5) PARAMETER Absolute Gain Error
CONDITIONS
MIN
TYP
VG+ - VG- = -2V
±0.4
VG+ - VG- = 0V
±0.4
VG+ - VG- = +2V
±0.4
MAX
UNITS dB
VG+ - VG- = -3V (VGA minimum gain), gain ratio with 330mVP-P/50mVP-P input tones
1.4
LNA low gain = 12.5dB, VG+ - VG- = -3V (VGA minimum gain), gain ratio with 600mVP-P/50mVP-P
0.8
Gain step up (VIN = 5mV P-P, gain changed from 10dB to 44dB, settling time is measured within 1dB final value)
1.4
Gain step down (VIN = 5mVP-P, gain changed from 44dB to 10dB, settling time is measured within 1dB final value)
1.6
VGA Output Offset Under Pulsed Overload
Overdrive is ±10mA in clamping diodes, gain at 30dB, 16 pulses at 5MHz, repetition rate 20kHz; offset is measured at output when RF duty cycle is off
180
mV
Small-Signal Output Noise
20dB of gain, VG+ - VG- = -0.85V, no input signal
23
nV/Hz
Large-Signal Output Noise
20dB of gain, VG+ - VG- = -0.85V, fRF = 5MHz, fNOISE = fRF + 1kHz, V OUT = 1V P-P differential
35
nV/Hz
Input Gain Compression
dB
μs
VGA Gain Response Time
Second Harmonic (HD2)
VIN = 50mV P-P, fRF = 2MHz, V OUT = 1VP-P
-67
VIN = 50mV P-P, fRF = 5MHz, V OUT = 1VP-P
-64.2
dBc
High-Gain IM3 Distortion
D3/D2/D1/D0 = 1/0/1/0 (RIN = 200, LNA gain = 18.5dB), VIN = 50mV P-P, fRF1 = 5MHz, fRF2 = 5.01MHz, VOUT = 1VP-P (Note 8)
-52
-61
dBc
Low-Gain IM3 Distortion
D3/D2/D1/D0 = 0/0/0/1 (RIN = 200, LNA gain = 12.5dB), VIN = 100mVP-P, fRF1 = 5MHz, fRF2 = 5.01MHz, VOUT = 1VP-P (Note 8)
-50
-60
dBc
Standby Mode Power-Up Response Time
Gain set for 26dB, fRF = 5MHz, VOUT = 1VP-P, settled within 1dB from transition on NP pin
2.1
μs
Standby Mode Power-Down Response Time
To reach DC current target ±10%
2.0
μs
Power-Up Response Time
Gain set for 28dB, fRF = 5MHz, VOUT = 1VP-P, settled within 1dB from transition on PD
2.7
ms
Power-Down Response Time
Gain set for 28dB, fRF = 5MHz, DC power reaches 6mW/channel, from transition on PD
5
ns
-58
dBc
-71
dBc
±1.2
Degrees
Adjacent Channel Crosstalk Nonadjacent Channel Crosstalk
VOUT = 1VP-P differential, fRF = 10MHz, 28dB of gain VOUT = 1VP-P differential, fRF = 10MHz, 28dB of gain
Phase Matching Between Channels
Gain = 28dB, VG+ - VG- = 0.4V, VOUT = 1VP-P, fRF = 10MHz
4
_______________________________________________________________________________________
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Octal-Channel Ultrasound Front-End (Typical Application Circuits, VREF = 2.475V to 2.525V, VCC1 = 3.13V to 3.47V, VCC2 = 4.5V to 5.25V, TA = 0°C to +70°C, VGND = 0V, NP = 0, PD = 0, D3/D2/D1/D0 = 1/0/1/0 (RIN = 200Ω, LNA gain = 18.5dB), D5/D4 = 1/1 (fC = 18MHz), fRF = 5MHz, RS = 200Ω, capacitance to GND at each of the VGA differential outputs is 25pF, differential capacitance across VGA outputs is 15pF, RL = 1kΩ differential, reference noise less than 10nV/√Hz from 1kHz to 20MHz, DOUT loaded with 10MΩ and 60pF. Typical values are at VCC1 = 3.3V, VCC2 = 4.75V, TA = +25°C, unless otherwise noted.) (Note 5) PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
3V Supply Modulation Ratio
Gain = 28dB, VG+ - VG- = 0.4V, VOUT = 1VP-P, fRF = 5MHz, fMOD = 1kHz, VMOD = 50mV P-P, ratio of output sideband at 5.001MHz, 1VP-P
-73
dBc
4.75V/5V Supply Modulation Ratio
Gain = 28dB, VG+ - VG- = 0.4V, VOUT = 1VP-P, fRF = 5MHz, fMOD = 1kHz, VMOD = 50mV P-P, ratio of output sideband at 5.001MHz, 1VP-P
-82
dBc
Gain Control Lines CommonMode Rejection Ratio
Gain = 28dB, VG+ - VG- = 0.4V, VOUT = 1VP-P, fRF = 5MHz, fMOD(CM) = 1kHz, VMOD(CM) = 50mVP-P, ratio of output sideband at 5.001MHz to 1VP-P
-74
dBc
Overdrive Phase Delay
VG+ - VG- = -3V, delay between VIN = 300mV P-P and VIN = 30mV P-P differential
5
ns
Output Impedance
Differential
100
AC ELECTRICAL CHARACTERISTICS—SERIAL PERIPHERAL INTERFACE (DOUT loaded with 60pF and 10MΩ, 2ns rise and fall edges on CLK.) PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
Clock Speed
MAX
UNITS
10
MHz
Mininimum Data-to-Clock Setup Time
tCS
5
ns
Mininimum Data-to-Clock Hold Time
tCH
0
ns
Mininimum Clock-to-CS Setup Time
t ES
5
ns
CS Positive Mininimum Pulse Width
t EW
1
ns
Mininimum Clock Pulse Width
tCW
2
ns
Note 5: Note 6:
Note 7: Note 8:
Minimum and maximum limits at TA = +25°C and +70°C are guaranteed by design, characterization, and/or production test. Noise performance of the device is dependent on the noise contribution from VREF. Use a low-noise supply for VREF. The reference input noise is given for 8 channels, knowing that the reference-noise contributions are correlated in all 8 channels. If more channels are used, the reference noise must be reduced to get the best noise performance. Not applicable to the MAX2077CTK+. See the Ultrasound-Specific IMD3 Specification section.
_______________________________________________________________________________________
5
MAX2077
AC ELECTRICAL CHARACTERISTICS (continued)
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Typical Operating Characteristics (Typical Application Circuits, VREF = 2.475V to 2.525V, VCC1 = 3.3V, VCC2 = 4.75V, TA = +25°C, VGND = 0V, NP = 0, PD = 0, D3/D2/D1/D0 = 1/0/1/0 (RIN = 200Ω, LNA gain = 18.5dB), D5/D4 = 1/1 (fC = 18MHz), fRF = 5MHz, RS = 200Ω, capacitance to GND at each of the VGA differential outputs is 25pF, differential capacitance across VGA outputs is 15pF, RL = 1kΩ differential, reference noise less than 10nV/√Hz from 1kHz to 20MHz, DOUT loaded with 10MΩ and 60pF, unless otherwise noted. All typical operating curves have been taken with the MAX2077CTN+ package variant.) GAIN vs. DIFFERENTIAL ANALOG CONTROL VOLTAGE
15
-2
-1
0
1
400
200Ω
100Ω
50Ω
400 300 200
200
3
2
500
1kΩ
600
0 -3
MAX2077 toc03
800
100 0 0
5
10
15
20
-0.4 -0.3 -0.2 -0.1
0
0.1 0.2 0.3 0.4
DIFFERENTIAL ANALOG CONTROL VOLTAGE (V)
FREQUENCY (MHz)
GAIN ERROR (dB)
OUTPUT-REFERRED NOISE vs. GAIN
INPUT-REFERRED NOISE vs. GAIN
SECOND-HARMONIC DISTORTION vs. GAIN
120 90 60 30
-30
5
MAX2077 toc06
150
6
VOUT = 1VP-P -40 fRF = 10MHz -50
4
HD2 (dBc)
MAX2077 toc04
180
MAX2077 toc05
5
GAIN ERROR HISTOGRAM 600
FREQUENCY
25
1000
MAX2077 toc02
MAX2077 toc01
35
INPUT-REFERRED NOISE (nV/√Hz)
GAIN (dB)
45
COMPLEX INPUT IMPEDANCE MAGNITUDE (I)
COMPLEX INPUT IMPEDANCE MAGNITUDE vs. FREQUENCY
55
OUTPUT-REFERRED NOISE (nV/√Hz)
MAX2077
Octal-Channel Ultrasound Front-End
3
-60 -70 fRF = 5MHz
2
-80 fRF = 2MHz
0
8
17
26 GAIN (dB)
6
35
44
1
-90 8
17
26 GAIN (dB)
35
44
20
26
32 GAIN (dB)
_______________________________________________________________________________________
38
44
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Octal-Channel Ultrasound Front-End
VOUT = 1VP-P -40
VOUT = 1VP-P
IMD3 (dBc)
-60
fRF = 10MHz -50 fRF = 2MHz
-70
fRF = 2MHz 26
-90
32
38
38
44
-30
MAX2077 toc10
HD2
-60 -70
-40
10 FREQUENCY (MHz)
-50
15
20
VOUT = 1VP-P GAIN = 26dB fRF = 5MHz HD2
-60 -70 -80
HD3 5
HD3
-90
0
0.2
0.4
0.6
0.8
1.0
VOUT_P-P (V)
SECOND- AND THIRD-HARMONIC DISTORTION vs. DIFFERENTIAL OUTPUT RESISTANCE
HD2 AND HD3 (dBc)
HD2 AND HD3 (dBc)
32
SECOND- AND THIRD-HARMONIC DISTORTION vs. FREQUENCY VOUT = 1VP-P GAIN = 26dB
0
26
GAIN (dB)
-50
-80
-90 20
GAIN (dB)
-30 -40
44
SECOND- AND THIRD-HARMONIC DISTORTION vs. DIFFERENTIAL OUTPUT LOAD CAPACITANCE -30
HD3
VOUT = 1VP-P GAIN = 26dB fRF = 5MHz
-40 HD2 AND HD3 (dBc)
20
-70
fRF = 5MHz
fRF = 5MHz
MAX2077 toc11
-90
HD2
-80
-70 -80
-60
MAX2077 toc12
HD3 (dBc)
fRF = 10MHz
GAIN = 26dB fRF = 5MHz HD2 AND HD3 (dBc)
-30 -50
-50
MAX2077 toc08
-10
MAX2077 toc07
-30
SECOND- AND THIRD-HARMONIC DISTORTION vs. VOUT_P-P
TWO-TONE ULTRASOUND-SPECIFIC IMD3 vs. GAIN
MAX2077 toc09
THIRD-HARMONIC DISTORTION vs. GAIN
-50
HD2
-60 -70 HD3
-80 -90
200 300 400 500 600 700 800 900 1000 DIFFERENTIAL OUTPUT RESISTANCE (I)
0
20
40
60
80
100
DIFFERENTIAL OUTPUT LOAD CAPACITANCE (pF)
_______________________________________________________________________________________
7
MAX2077
Typical Operating Characteristics (continued) (Typical Application Circuits, VREF = 2.475V to 2.525V, VCC1 = 3.3V, VCC2 = 4.75V, TA = +25°C, VGND = 0V, NP = 0, PD = 0, D3/D2/D1/D0 = 1/0/1/0 (RIN = 200Ω, LNA gain = 18.5dB), D5/D4 = 1/1 (fC = 18MHz), fRF = 5MHz, RS = 200Ω, capacitance to GND at each of the VGA differential outputs is 25pF, differential capacitance across VGA outputs is 15pF, RL = 1kΩ differential, reference noise less than 10nV/√Hz from 1kHz to 20MHz, DOUT loaded with 10MΩ and 60pF, unless otherwise noted. All typical operating curves have been taken with the MAX2077CTN+ package variant.)
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Typical Operating Characteristics (continued) (Typical Application Circuits, VREF = 2.475V to 2.525V, VCC1 = 3.3V, VCC2 = 4.75V, TA = +25°C, VGND = 0V, NP = 0, PD = 0, D3/D2/D1/D0 = 1/0/1/0 (RIN = 200Ω, LNA gain = 18.5dB), D5/D4 = 1/1 (fC = 18MHz), fRF = 5MHz, RS = 200Ω, capacitance to GND at each of the VGA differential outputs is 25pF, differential capacitance across VGA outputs is 15pF, RL = 1kΩ differential, reference noise less than 10nV/√Hz from 1kHz to 20MHz, DOUT loaded with 10MΩ and 60pF, unless otherwise noted. All typical operating curves have been taken with the MAX2077CTN+ package variant.) ADJACENT CHANNEL-TO-CHANNEL CROSSTALK vs. GAIN
VOUT = 1VP-P GAIN = 26dB
VOUT = 1VP-P fRF = 10MHz
VOUT = 1VP-P GAIN = 20dB
-40
-60
CROSSTALK (dBc)
-55 CROSSTALK (dBc)
IMD3 (dBc)
-20
0
MAX2077 toc14
-50
MAX2077 toc13
0
ADJACENT CHANNEL-TO-CHANNEL CROSSTALK vs. FREQUENCY MAX2077 toc15
TWO-TONE ULTRASOUND-SPECIFIC IMD3 vs. FREQUENCY
-60 ADJACENT CHANNEL 1
-30
ADJACENT CHANNEL 1 -60
-65 ADJACENT CHANNEL 2 ADJACENT CHANNEL 2 -70 0
5
10
20
15
17
26
35
44
1
10
100
FREQUENCY (MHz)
GAIN (dB)
FREQUENCY (MHz)
LARGE-SIGNAL BANDWIDTH vs. FREQUENCY (GAIN = 20dB, VOUT = 1VP-P)
COMMON-MODE OUTPUT VOLTAGE vs. GAIN
DIFFERENTIAL OUTPUT IMPEDANCE vs. FREQUENCY
15MHz 10
18MHz
9MHz
0
10MHz
-10 -20
VOUT = 1VP-P GAIN = 20dB 1
1.7
1.6
FREQUENCY (MHz)
100
REAL
120
80
60
40 60 20 IMAGINARY
1.5 10
MAX2077 toc17
1.8
MAX2077 toc18
180
REAL COMPONENT (I)
20
1.9 COMMON-MODE OUTPUT VOLTAGE (V)
MAX2077 toc16
30
8
-90 8
8
17
26 GAIN (dB)
35
44
0
0
10
20
30
FREQUENCY (MHz)
_______________________________________________________________________________________
40
0 50
IMAGINARY COMPONENT (I)
-80
GAIN (dB)
MAX2077
Octal-Channel Ultrasound Front-End
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Octal-Channel Ultrasound Front-End
LNA OVERLOAD RECOVERY TIME (VIN = 500mVP-P FOR 0.5µs TO 100mVP-P FOR 1µs AND BACK TO 500mVP-P FOR 0.5µs, GAIN =10dB) MAX2077 toc19
1.25
VGA OVERLOAD RECOVERY TIME (VIN = 40mVP-P FOR 1µs TO 4mVP-P FOR 1µs AND BACK TO 40mVP-P FOR 1µs, GAIN = 42.5dB)
0.5
MAX2077 toc20
3
0.25
-0.5
-0.75
0
500
1 -0.05 0
-1.0
OUTPUT
1000
-1
-1.5 2000
1500
0
-2
-0.10
OUTPUT
500
0
TIME (ns)
INPUT (V)
0 OUTPUT (V)
2
0.75
-0.25
0.05
INPUT
INPUT (V)
OUTPUT (V)
INPUT
1000
1500
-0.15 2000
TIME (ns)
OVERDRIVE PHASE DELAY vs. FREQUENCY
MAX2077 toc21
45 OVERDRIVE PHASE DELAY (ns)
INPUT = 300mVP-P 36 27 18 INPUT = 30mVP-P 9 0
GAIN = 10dB 0
5
10
15
20
FREQUENCY (MHz)
_______________________________________________________________________________________
9
MAX2077
Typical Operating Characteristics (continued) (Typical Application Circuits, VREF = 2.475V to 2.525V, VCC1 = 3.3V, VCC2 = 4.75V, TA = +25°C, VGND = 0V, NP = 0, PD = 0, D3/D2/D1/D0 = 1/0/1/0 (RIN = 200Ω, LNA gain = 18.5dB), D5/D4 = 1/1 (fC = 18MHz), fRF = 5MHz, RS = 200Ω, capacitance to GND at each of the VGA differential outputs is 25pF, differential capacitance across VGA outputs is 15pF, RL = 1kΩ differential, reference noise less than 10nV/√Hz from 1kHz to 20MHz, DOUT loaded with 10MΩ and 60pF, unless otherwise noted. All typical operating curves have been taken with the MAX2077CTN+ package variant.)
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MAX2077
Octal-Channel Ultrasound Front-End Pin Description PIN
NAME
FUNCTION
2
INC2
Channel 2 Clamp Input. Connect to a coupling capacitor. See the Typical Application Circuits for details.
2
3
ZF3
Channel 3 Active Impedance Matching Line. AC-couple to source with a 10nF capacitor.
3
4
IN3
56 TQFN
68 TQFN
1
4
5
INC3
5
6
ZF4
Channel 4 Active Impedance Matching Line. AC-couple to source with a 10nF capacitor.
6
7
IN4
7
8
INC4
Channel 4 Input Channel 4 Clamp Input. Connect to a coupling capacitor. See the Typical Application Circuits for details.
8
10
AG
AC Ground. Connect a low-ESR 1μF capacitor to ground.
9
11
ZF5
Channel 5 Active Impedance Matching Line. AC-couple to source with a 10nF capacitor.
10
12
IN5
Channel 5 Input Channel 5 Clamp Input. Connect to a coupling capacitor. See the Typical Application Circuits for details.
11
13
INC5
12
14
ZF6
Channel 6 Active Impedance Matching Line. AC-couple to source with a 10nF capacitor.
13
15
IN6
Channel 6 Input
14
16
INC6
15
17
ZF7
Channel 7 Active Impedance Matching Line. AC-couple to source with a 10nF capacitor.
16
18
IN7
Channel 7 Input
17
19
INC7
18
20
ZF8
Channel 8 Active Impedance Matching Line. AC-couple to source with a 10nF capacitor.
19
21
IN8
Channel 8 Input
20
22
INC8
Channel 8 Clamp Input. Connect to a coupling capacitor. See the Typical Application Circuits for details.
21, 51
23, 64
VCC2
4.75V Power Supply. Connect to an external 4.75V power supply. Connect all 4.75V supply pins together externally and bypass with 100nF capacitors as close as possible to the pin.
VREF
External 2.5V Reference Supply. Connect to a low-noise power supply. Bypass to GND with a 0.1μF capacitor as close as possible to the pins. Note that noise performance of the device is dependent on the noise contribution from VREF. Use a supply with noise lower than 5nV/Hz from 1kHz to 20MHz.
VCC1
3.3V Power Supply. Connect to an external 3.3V power supply. Connect all 3.3V supply pins together externally and bypass with 100nF capacitors as close as possible to the pin.
22
24
23, 35, 49 25, 44, 63
10
Channel 3 Input Channel 3 Clamp Input. Connect to a coupling capacitor. See the Typical Application Circuits for details.
24
26
VG+
25
27
VG-
26
32
DOUT
Channel 6 Clamp Input. Connect to a coupling capacitor. See the Typical Application Circuits for details.
Channel 7 Clamp Input. Connect to a coupling capacitor. See the Typical Application Circuits for details.
VGA Analog Gain Control Differential Input. Set the differential voltage to -3V for minimum gain and to +3V for maximum gain. Serial Port Data Output. Data output for ease of daisy-chain programming. The level is 3.3V CMOS.
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Octal-Channel Ultrasound Front-End PIN
NAME
FUNCTION
56 TQFN
68 TQFN
27
34
OUT8-
28
35
OUT8+
Channel 8 Positive Differential Output
29
36
OUT7-
Channel 7 Negative Differential Output
30
37
OUT7+
Channel 7 Positive Differential Output
31
38
OUT6-
Channel 6 Negative Differential Output
32
39
OUT6+
Channel 6 Positive Differential Output
33
40
OUT5-
Channel 5 Negative Differential Output
34
41
OUT5+
Channel 5 Positive Differential Output
36
45
OUT4-
Channel 4 Negative Differential Output
37
46
OUT4+
Channel 4 Positive Differential Output
38
47
OUT3-
Channel 3 Negative Differential Output
39
48
OUT3+
Channel 3 Positive Differential Output
40
49
OUT2-
Channel 2 Negative Differential Output
41
50
OUT2+
Channel 2 Positive Differential Output
42
51
OUT1-
Channel 1 Negative Differential Output
43
52
OUT1+
Channel 1 Positive Differential Output
44
54
CLK
Serial Port Data Clock (Positive Edge Triggered). 3.3V CMOS. Clock input for programming the serial shift registers.
45
55
DIN
Serial Port Data Input Line. 3.3V CMOS. Data input to program the serial shift registers.
46
56
CS
Active-Low Serial Port Chip Select. 3.3V CMOS. Used to store programming bits in registers, as well as in CW mode, synchronizing all channel phases (on a rising edge).
47
—
PD
Power-Down Mode Select Input (56-Pin TQFN Only). Drive PD high to place the entire device in power-down mode. Drive PD low for normal operation. This mode overrides the standby mode.
48
57
NP
VGA Standby Mode Select Input. Set NP to 1 to place the entire device in standby mode. Overrides soft channel shutdown in serial shift register, but not general power-down (PD).
50
9, 28, 31
GND
Ground
52
65
ZF1
Channel 1 Active Impedance Matching Line. AC-couple to source with a 10nF capacitor.
53
66
IN1
Channel 8 Negative Differential Output
Channel 1 Input Channel 1 Clamp Input. Connect to a coupling capacitor. See the Typical Application Circuits for details.
54
67
INC1
55
68
ZF2
Channel 2 Active Impedance Matching Line. AC-couple to source with a 10nF capacitor.
56
1
IN2
Channel 2 Input
—
29, 30, 33, 42, 43, 53, 58–62
N.C.
No Connection. Internally not connected.
—
—
EP
Exposed pad. Internally connected to ground. Connect to a large ground plane using multiple vias to maximize thermal and electrical performance. Not intended as an electrical connection point.
______________________________________________________________________________________
11
MAX2077
Pin Description (continued)
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Octal-Channel Ultrasound Front-End MAX2077
Functional Diagram IN2
ZF2
INC1
IN1
ZF1
VCC2
GND
VCC1
NP
PD*
CS
DIN
CLK
OUT1+
OUT1-
INC2
VGA
ZF3
OUT2+ LNA
ANTI-ALIAS
IN3
OUT2-
VGA INC3
OUT3+
LNA
ANTI-ALIAS
ZF4
OUT3VGA
LNA
IN4
ANTI-ALIAS
OUT4+
VGA
INC4
LNA
OUT4-
ANTI-ALIAS VCC1
AG
VGA
OUT5+
ZF5 LNA
ANTI-ALIAS OUT5-
IN5 VGA
LNA
INC5
OUT6+
ANTI-ALIAS
OUT6-
VGA
ZF6
LNA
ANTI-ALIAS
IN6
OUT7+
VGA INC6
OUT7LNA
*PD FUNCTION ONLY APPLICABLE TO 56-PIN TQFN PACKAGE.
12
ZF7
IN7
INC7
ZF8
IN8
INC8
VCC2
VREF
ANTI-ALIAS
VCC1
VG+
VG-
DOUT
OUT8-
OUT8+
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Octal-Channel Ultrasound Front-End 140dBc/Hz at 1kHz offset from a VOUT = 1VP-P, 5MHz clutter signal. To add CW Doppler capability, replace the MAX2077 with the MAX2078.
The MAX2077 is a high-density, octal-channel ultrasound receiver optimized for low-cost, high-channel count, high-performance portable and cart-based ultrasound applications. The integrated octal LNA, VGA, and AAF offer a complete ultrasound imaging path receiver solution. Imaging path dynamic range has been optimized for exceptional second-harmonic performance. The complete imaging receive channel exhibits an exceptional 68dBFS* SNR at 5MHz. The bipolar front-end has also been optimized for exceptionally low near-carrier modulation noise for exceptional low-velocity pulsed and color-flow Doppler sensitivity under high-clutter conditions, achieving an impressive near-carrier SNR of
Modes of Operation The MAX2077 requires programming before it can be used. The operating modes are controlled by the D0–D6 programming bits. Tables 1 and 2 show the functions of these programming bits.
Low-Noise Amplifier (LNA) The MAX2077’s LNA is optimized for excellent dynamic range and linearity performance characteristics, making it ideal for ultrasound imaging applications. When the LNA is placed in low-gain mode, the input resistance (R IN ), being a function of the gain A (R IN = RF/(1+A)), increases by a factor of approximately 2.
*When coupled with the MAX1437B ADC.
Table 1. Summary of Programming Bits BIT NAME
DESCRIPTION
D0, D1, D2
Input-impedance programming
D3
LNA gain (D3 = 0 is low gain)
D4, D5
Anti-alias filter fC programming
D6
Don’t care
Table 2. Logic Functions of Programming Bits D6
D5
D4
D3
D2
D1
D0
MODE
X
X
X
1
0
0
0
RIN = 50, LNA gain = 18.5dB
X
X
X
1
0
0
1
RIN = 100
X
X
X
1
0
1
0
RIN = 200
X
X
X
1
0
1
1
RIN = 1000
X
X
X
0
0
0
0
RIN = 100, LNA gain = 12.5dB
X
X
X
0
0
0
1
RIN = 200
X
X
X
0
0
1
0
RIN = 400
X
X
X
0
0
1
1
RIN = 2000
X
X
X
1
1
X
X
Open feedback, LNA gain = 18.5dB
X
0
0
X
X
X
X
fC = 9MHz
X
0
1
X
X
X
X
fC = 10MHz
X
1
0
X
X
X
X
fC = 15MHz
X
1
1
X
X
X
X
fC = 18MHz
X = Don’t care.
______________________________________________________________________________________
13
MAX2077
Detailed Description
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MAX2077
Octal-Channel Ultrasound Front-End Consequently, the switches that control the feedback resistance (RF) have to be changed. For instance, the 100Ω mode in high gain becomes the 200Ω mode in low gain (see Table 2).
time. The line is pulled down before the programming begins and pulled up after it is complete for all devices used. On the rising edge, the information is stored in internal registers.
Variable-Gain Amplifier (VGA)
Active Impedance Matching
The MAX2077’s VGAs are optimized for high linearity, high dynamic range, and low output-noise performance, all of which are critical parameters for ultrasound imaging applications. Each VGA path includes circuitry for adjusting analog gain, as well as an output buffer with differential output ports (OUT_+, OUT_-) for driving ADCs. The VGA gain can be adjusted through the differential gain control input VG+ and VG-. Set the differential gain control input voltage at -3V for minimum gain and +3V for maximum gain. The differential analog control common-mode voltage is 1.65V (typ).
To provide exceptional noise-figure characteristics, the input impedance of each amplifier uses a feedback topology for active impedance matching. A feedback resistor of the value (1 + (A/2)) x RS is added between the inverting input of the amplifier to the output. The input impedance is the feedback resistor (ZF) divided by 1 + (A/2). The factor of two is due to the gain of the amplifier (A) being defined with a differential output. For common input impedances, the internal digitally programmed impedances can be used (see Table 2). For other input impedances, use an externally supplied resistor in series with the existing programmable feedback impedances to set the input impedance according to the above formula.
Overload Recovery The device is also optimized for quick overload recovery for operation under the large input signal conditions that are typically found in ultrasound imaging applications. See the Typical Operating Characteristics for an illustration of the rapid recovery time from a transmit-related overload.
Power-Down Mode The MAX2077CTN+ can also be powered down with PD (the same feature is not available in the MAX2077CTK+). Set PD to logic-high for power-down mode. In powerdown mode, the device consumes 3.0µW (typ) power. Set PD to logic-low for normal operation. Setting NP to logic-high places the MAX2077 in standby mode. In standby mode, the device consumes less power (5.6mW typ), but input/output pins remain biased to provide quick power-up response time. Standby mode is available for both MAX2077CTN+ and MAX2077CTK+ versions.
Applications Information Serial Interface The MAX2077 is programmed using a serial shift register arrangement. This greatly simplifies the complexity of the program circuitry, reduces the number of IC pins necessary for programming, and reduces the PCB layout complexity. The data in (DIN) and data out (DOUT) can be daisy-chained from device to device and all front-ends can run off a single programming clock. The data can be entered after CS goes low. Once a whole word is entered, CS needs to rise. When programming the part, enter LSB first and MSB last. The chip-select line (CS) is used to load the programming information in multiple MAX2077 devices at the same 14
Noise Figure The MAX2077 is designed to provide maximum input sensitivity with exceptionally low noise figure. The input active devices are selected for very low-equivalent input-noise voltage and current, optimized for source impedances from 50Ω to 1000Ω. Additionally, the noise contribution of the matching resistor is effectively divided by 1 + (A/2). Using this scheme, typical noise figure of the amplifier is approximately 2.4dB for RIN = RS = 200Ω. Table 3 illustrates the noise figure for other input impedances.
Input Clamp The MAX2077 includes configurable integrated inputclamping diodes. The diodes are clamped to ground at ±0.8V. The input-clamping diodes can be used to prevent large transmit signals from overdriving the inputs of the amplifiers. Overdriving the inputs could possibly place charge on the input-coupling capacitor, causing longer transmit overload recovery times. Input signals are AC-coupled to the single-ended inputs IN1–IN8, but are clamped with the INC1–INC8 inputs. See the Typical Application Circuits. If external clamping devices are preferred, simply leave INC1–INC8 unconnected.
Table 3. Noise Figure vs. Source and Input Impedances RS ()
RIN ()
50
50
4.5
100
100
3.4
200
200
2.4
1000
1000
2.2
______________________________________________________________________________________
NF (dB)
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Octal-Channel Ultrasound Front-End MAX2077
MSB
LSB D0
DIN
D1
D5
D6
CLK tCS
tCW tCH
CS tES tEWS tEW NOTES: DATA ENTERED ONE CLOCK RISING EDGE. REGISTER STATE CHARGE ON CS RISING EDGE. DATA IS ENTERED LSB FIRST IF MORE THAN 7 BITS ARE ENTERED, THE EXTRA BITS MUST PRECEDE THE LSB.
Figure 1. Shift Register Timing Diagram
Analog Output Coupling Each of the VGA output pins can drive 25pF to GND and 15pF || 1kΩ differentially. The differential outputs have a common-mode bias of approximately 1.73V. AC-couple these differential outputs if the next stage has a different common-mode input range.
(f1 - (f2 - f1)) presents itself as an undesired Doppler error signal in ultrasound applications (see Figure 2).
Power-Supply Sequencing Use the following power-on sequence: 1) 4.75V supply 2) 3.3V supply 3) 2.5V reference voltage 4) Control signals Before a signal is turned on, it should be either at 0V or in an open state.
-25dB
ULTRASOUND IMD3
Ultrasound-Specific IMD3 Specification Unlike typical communications applications, the two input tones are not equal in magnitude for the ultrasound-specific IMD3 two-tone specification. In this measurement, f1 represents reflections from tissue and f2 represents reflections from blood. The latter reflections are typically 25dB lower in magnitude, and hence the measurement is defined with one input tone 25dB lower than the other. The IMD3 product of interest
f1 - (f2 - f1)
f1
f2
f2 + (f2 - f1)
Figure 2. Ultrasound IMD3 Measurement Technique
______________________________________________________________________________________
15
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PCB Layout
Chip Information
The pin configuration of the MAX2077 is optimized to facilitate a very compact physical layout of the device and its associated discrete components. A typical application for this device might incorporate several devices in close proximity to handle multiple channels of signal processing. The exposed pad (EP) of the MAX2077’s TQFN-EP packages provide a low thermal-resistance path to the die. It is important that the PCB on which the MAX2077 is mounted be designed to conduct heat from the EP. In addition, provide the EP with a low-inductance path to electrical ground. The EP MUST be soldered to a ground plane on the PCB, either directly or through an array of plated via holes.
PROCESS: Complementary BiCMOS
Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE
PACKAGE CODE
DOCUMENT NO.
56 TQFN-EP
T5688+2
21-0135
68 TQFN-EP
T6800+2
21-0142
Pin Configurations
OUT7-
OUT7+
OUT6-
OUT6+
OUT5-
OUT5+
VCC1
OUT4-
OUT4+
OUT3-
OUT3+
OUT2-
OUT2+
OUT1-
TOP VIEW
42 41 40 39 38 37 36 35 34 33 32 31 30 29 OUT1+ 43
28 OUT8+
CLK 44
27 OUT8-
DIN 45
26 DOUT
CS 46
25 VG-
PD 47
24 VG+
NP 48
23 VCC1 22 VREF
VCC1 49
MAX2077
GND 50
21 VCC2
VCC2 51
20 INC8
ZF1 52
19 IN8
IN1 53
18 ZF8 17 INC7
INC1 54 ZF2 55
*EP
+
16 IN7 15 ZF7
10 11 12 13 14 INC6
9
IN6
ZF4
8
ZF6
INC3
7
IN5
IN3
6
INC5
5
ZF5
4
AG
3
INC4
2
IN4
1
ZF3
IN2 56
INC2
MAX2077
Octal-Channel Ultrasound Front-End
TQFN (8mm × 8mm) *EP = EXPOSED PAD.
16
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Octal-Channel Ultrasound Front-End
OUT8+
OUT7-
OUT6-
OUT7+
OUT6+
OUT5-
OUT5+
N.C.
VCC1
N.C.
OUT4-
OUT4+
OUT3-
OUT3+
OUT2-
OUT1-
OUT2+
TOP VIEW
51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 OUT8-
OUT1+ 52 N.C. 53
33 N.C.
CLK 54
32 DOUT
DIN 55
31 GND
CS 56
30 N.C.
NP 57
29 N.C. 28 GND
N.C. 58
MAX2077
N.C. 59
27 VG-
N.C. 60
26 VG+
N.C. 61
25 VCC1
N.C. 62
24 VREF
VCC1 63
23 VCC2
VCC2 64
22 INC8
ZF1 65
21 IN8 20 ZF8
IN1 66 INC1 67
*EP
+
19 INC7 18 IN7
ZF7
ZF4
INC6
INC3
10 11 12 13 14 15 16 17 IN6
IN3
9
ZF6
ZF3
8
INC5
IN2
7
IN5
6
AG
5
ZF5
4
GND
3
INC4
2
IN4
1
INC2
ZF2 68
TQFN (10mm × 10mm) *EP = EXPOSED PAD.
______________________________________________________________________________________
17
MAX2077
Pin Configurations (continued)
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Octal-Channel Ultrasound Front-End MAX2077
Typical Application Circuits
INC5 C10 22nF
C9 10nF
ZF6 IN6
IN6
INC6
DIN
PD
CLK
OUT1+
CLK
DIN
CS
36
MAX2077
8
35
9
34
10
33 32
11 12
31
13
30
*EP
29
14
IN7
ZF7
16
C11 10nF
17
18
19
20
21
22
23
24
25
26
C13 10nF C12 22nF
C14 22nF
C15 100nF
IN8
IN7
VCC2
18
PD
37
7
15
*EP = EXPOSED PAD.
NP
GND
VCC2
ZF1
IN1
6
C16 100nF VCC1
27
C32 4.7nF
OUT1OUT2+
C30 4.7nF
OUT2OUT3+
C29 4.7nF C28 4.7nF
OUT3OUT4+
OUT1-
C31 4.7nF
C27 4.7nF C26 4.7nF
OUT4-
OUT5+
C24 4.7nF C23 4.7nF
OUT5OUT6+
C22 4.7nF C21 4.7nF
OUT6OUT7+ OUT7-
C20 4.7nF C19 4.7nF
28
C17 4.7nF
OUT2+ OUT2OUT3+ OUT3OUT4+ OUT4-
VCC1
C18 4.7nF
OUT8+
IN5
IN5
38
OUT8+
ZF5
39
5
OUT8-
C7 10nF
4
OUT8-
C8 22nF
AG
40
3
DOUT
C6 180nF
43
41
VG-
INC4
44
42
DOUT
IN4
45
+
VG-
IN4
46
2
VG+
ZF4
47
VG+
C4 10nF
48
VCC1
C5 22nF
49
REF
INC3
50
VREF
IN3
51
VCC2
IN3
1
IN8
ZF3
52
C33 4.7nF
INC8
C2 10nF
53
ZF8
C3 22nF
54
INC7
IN2
55
INC1
ZF2
IN2 56
VCC1
C37 22nF C38 10nF
C39 10nF
CS
NP IN1
VCC1
C1 22nF
INC2
C35 100nF
OUT1+
VCC2 C36 100nF
______________________________________________________________________________________
OUT5+ OUT5OUT6+ OUT6OUT7+ OUT7-
C25 100nF
VCC1
Distributor of Maxim Integrated: Excellent Integrated System Limited Datasheet of MAX2077CTN+ - IC OCT ULTRASOUND FRONTEND 56QFN Contact us:
[email protected] Website: www.integrated-circuit.com
Octal-Channel Ultrasound Front-End
AG C8 22nF
C7 10nF
ZF5 IN5
IN5
INC5 C10 22nF
C9 10nF
ZF6 IN6
IN6
INC6 C11 10nF
ZF7
2
OUT1+
DIN
CLK
CS
NP
OUT1+
N.C.
CLK
N.C.
DIN
N.C.
CS
N.C.
NP
N.C.
VCC1
VCC2
50 49
4
48
5
47
6
46 45
7
44
8 9
OUT2+
OUT4+
12
40
13
39
14
38
15
37 *EP
36
17
35
IN7
IN7
22
23
24
25
26
27
28
29
30
31
32
33
VCC2
OUT3+ OUT3OUT4+ OUT4- C25 100nF
VCC1
OUT5+
C24 4.7nF C23 4.7nF
OUT5OUT6+
C22 4.7nF C21 4.7nF
OUT6OUT7+
C20 4.7nF C19 4.7nF
OUT7OUT8+
C18 4.7nF
OUT5+ OUT5OUT6+ OUT6OUT7+ OUT7OUT8+
C40 4.7nF
OUT8-
C16 100nF
OUT2-
VG-
VG+
REF C15 100nF
DOUT
IN8
C26 4.7nF
OUT2+
34
C13 10nF C14 22nF
C27 4.7nF
VCC1
41
21
C28 4.7nF
OUT4-
42 N.C.
20
C29 4.7nF
OUT3-
11
19
C30 4.7nF
OUT2OUT3+
OUT1-
C31 4.7nF
43 N.C.
MAX2077
16
C32 4.7nF
OUT1-
10
18
C12 22nF
52
3
N.C.
GND
C6 1µF
53
OUT8-
INC4
54
DOUT
IN4
55
GND
IN4
56
N.C.
ZF4
57
N.C.
C4 10nF
58
GND
C5 22nF
59
VG-
INC3
60
VG+
IN3
61
VREF
IN3
62
VCC1
ZF3
VCC2
C2 10nF
63
+
IN8
C3 22nF
64
INC8
IN2
65
51
ZF8
INC2
66
1
INC7
IN2
67
C33 4.7nF
N.C.
68
IN1
ZF2
C39 10nF
INC1
C1 22nF
ZF1
C36 C35 100nF 100nF C37 22nF VCC2 VCC1 C38 10nF
IN1
VCC1
*EP = EXPOSED PAD.
______________________________________________________________________________________
19
MAX2077
Typical Application Circuits (continued)
Distributor of Maxim Integrated: Excellent Integrated System Limited Datasheet of MAX2077CTN+ - IC OCT ULTRASOUND FRONTEND 56QFN Contact us:
[email protected] Website: www.integrated-circuit.com
MAX2077
Octal-Channel Ultrasound Front-End Revision History REVISION NUMBER
REVISION DATE
0
7/09
Initial release
1
9/09
Removed future product reference for MAX2077CTK+ package and made minor corrections
DESCRIPTION
PAGES CHANGED — 1, 6–9, 12
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
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