ANALOG DEVICES ADA4691-2, ADA4691-4, ADA4692-2, ADA4692-4 Service Manual

Low Power, 3.6 MHz, Low Noise, Rail-to-
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4

FEATURES

Low power: 180 μA typical Very low input bias currents: 0.5 pA typical Low noise: 16 nV/√Hz typical
3.6 MHz bandwidth Offset voltage: 500 μV typical Low offset voltage drift: 4 μV/°C maximum Low distortion: 0.003% THD + N
2.7 V to 5 V single supply or ±1.35 V to ±2.5 V dual supply Available in very small 2 mm × 2 mm LFCSP packages

APPLICATIONS

Photodiode amplifiers Sensor amplifiers Portable medical and instrumentation Portable audio: MP3s, PDAs, and smartphones Communications Low-side current sense ADC drivers Active filters Sample-and-hold

GENERAL DESCRIPTION

The ADA4691-2/ADA4692-2 are dual and the ADA4691-4/ ADA4692-4 are the quad rail-to-rail output, single-supply amplifiers featuring low power, wide bandwidth, and low noise. The ADA4691-2 has two independent shutdown pins, allowing further reduction in supply current. The ADA4691-4 is a quad with dual shutdown pins each controlling a pair of amplifiers and is available in the 16-lead LFCSP. The ADA4692-4 is a quad version without shutdown.
These amplifiers are ideal for a wide variety of applications. Audio, filters, photodiode amplifiers, and charge amplifiers, all benefit from this combination of performance and features. Additional applications for these amplifiers include portable consumer audio players with low noise and low distortion that provide high gain and slew rate response over the audio band at low power. Industrial applications with high impedance sensors, such as pyroelectric and IR sensors, benefit from the high impedance and low 0.5 pA input bias, low offset drift, and enough bandwidth and response for low gain applications.
Rail Output, Operational Amplifiers
The ADA4691/ADA4692 family is fully specified over the extended industrial temperature range (−40°C to +125°C). e ADA4691-2 is available in a 10-lead LFCSP and a 9-ball WLCSP. The ADA4692-2 is available in an 8-lead SOIC and 8-lead LFCSP. The ADA4691-4 is available in a 16-lead LFCSP. The ADA4692-4 is available in a 14-lead TSSOP. For pin configurations, see the Pin Configurations section.
1
ADA4692-2 V
= ±2.5V
SY
A
= –1
V
T
= 25°C
A
0.1
RL = 600
THD + N (%)
0.01
0.001 10 100 1k 10k 20k
Figure 1. THD + Noise vs. Frequency
80
ADA4692-2 V
= ±2.5V
SY
V
= 2.8V p- p
IN
–90
A
= +1
V
T
= 25°C
A
–100
–110
–120
CHANNEL SEPARATI ON (dB)
–130
–140
100 1k 10k 100k
Figure 2. Channel Separation vs. Frequency
FREQUENCY (Hz)
FREQUENCY (Hz)
R
= 2k
L
07950-142
07950-141
Table 1.
Micropower Low Power Low Power with Shutdown Standard Op Amp With Shutdown High Bandwidth
Single AD8613 AD8591 AD8691 Dual AD8617 ADA4692-2 ADA4691-2 AD8592 AD8692 Quad AD8619 ADA4692-4 ADA4691-4 AD8594 AD8694
Rev. D
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 that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2009–2010 Analog Devices, Inc. All rights reserved.
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4

TABLE OF CONTENTS

Features.............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics—2.7 V Operation ............................ 3
Electrical Characteristics—5 V Operation................................ 4
Absolute Maximum Ratings............................................................ 6
Thermal Resistance ...................................................................... 6

REVISION HISTORY

11/10—Rev. C to Rev. D
Changed 5 V to 6 V in Endnote 2, Table 4 .................................... 6
12/09—Rev. B to Rev. C
Added ADA4691-4, 16-Lead LFCSP ..........................Throughout
Added Figure 1, Figure 2, and Table 1; Renumbered
Sequentially ....................................................................................... 1
Changes to Applications Section and General Description
Section................................................................................................ 1
Changes to Table 1............................................................................ 3
Changes to Table 2............................................................................ 4
Changes to Table 4............................................................................ 6
Updated Outline Dimensions....................................................... 17
Changes to Ordering Guide.......................................................... 20
9/09—Rev. A to Rev. B
Added ADA4691-2, 9-Ball WLCSP; ADA4692-2, 8-Lead
LFCSP; and ADA4692-4, 14-Lead TSSOP................. Throughout
Changes to General Description .................................................... 1
Updated Outline Dimensions....................................................... 16
Changes to Ordering Guide.......................................................... 17
ESD Caution...................................................................................6
Pin Configurations............................................................................7
Typical Performance Characteristics..............................................8
Shutdown Operation...................................................................... 16
Input Pin Characteristics........................................................... 16
Input Threshold.......................................................................... 16
Outline Dimensions....................................................................... 17
Ordering Guide .......................................................................... 20
6/09—Rev. 0 to Rev. A
Added ADA4691-2, 10 Lead LFCSP........................... Throughout
Changes to Table 1.............................................................................3
Changes to Table 2.............................................................................4
Changes to Captions for Figure 40, Figure 41, Figure 43, and
Figure 44 .......................................................................................... 13
Added Shutdown Operations Section ......................................... 15
Updated Outline Dimensions....................................................... 16
Changes to Ordering Guide.......................................................... 16
3/09—Revision 0: Initial Version
Rev. D | Page 2 of 20
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4

SPECIFICATIONS

ELECTRICAL CHARACTERISTICS—2.7 V OPERATION

VSY = 2.7 V, VCM = VSY/2, TA = 25°C, unless otherwise specified.
Table 2.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage VOS V
Dual (ADA469x-2) VCM = −0.1 V to +1.6 V; −40°C < TA < +125°C 3.5 mV Quad (ADA469x-4) VCM = −0.1 V to +1.6 V; −40°C < TA < +125°C 4.0 mV
Offset Voltage Drift ΔVOS/ΔT −40°C < TA < +125°C 1 4 μV/°C
Input Bias Current IB 0.5 5 pA
−40°C < TA < +125°C 360 pA
Input Offset Current IOS 1 8 pA
−40°C < TA < +125°C 225 pA Input Voltage Range −40°C < TA < +125°C −0.3 +1.6 V Common-Mode Rejection Ratio CMRR VCM = −0.3 V to +1.6 V 70 90 dB
V
Large Signal Voltage Gain AVO R
−40°C < TA < +85°C 80 dB
−40°C < TA < +125°C 63 dB R Input Capacitance CIN
Differential Mode C Common Mode C
2.5 pF
INDM
7 pF
INCM
Logic High Voltage (Enabled) VIH −40°C < TA < +125°C 1.6 V Logic Low Voltage (Power-Down) VIL −40°C < TA < +125°C 0.5 V Logic Input Current (Per Pin) IIN −40°C < TA < +125°C, 0 V ≤ VSD ≤ 2.7 V 1 μA
OUTPUT CHARACTERISTICS
Output Voltage High VOH R
−40°C < TA < +125°C 2.6 V R
−40°C < TA < +125°C 2.5 V Output Voltage Low VOL R
−40°C < TA < +125°C 40 mV R
−40°C < TA < +125°C 130 mV Short-Circuit Current ISC V Closed-Loop Output Impedance Z
f = 1 MHz, AV = −100 372 Ω
OUT
Output Pin Leakage Current −40°C < TA < +125°C, shutdown active, VSD = VSS 10 nA
POWER SUPPLY
Power Supply Rejection Ratio PSRR VS = 2.7 V to 5.5 V 80 90 dB
−40°C < TA < +125°C 75 dB Supply Current Per Amplifier ISY V
−40°C < TA < +125°C 240 μA
Supply Current Shutdown Mode ISD All amplifiers shut down, VSD = V
−40°C < TA < +125°C 2 μA
= −0.3 V to +1.6 V 0.5 2.5 mV
CM
= −0.1 V to +1.6 V; −40°C < TA < +125°C 62 dB
CM
= 2 kΩ, V
L
= 600 Ω, V
L
= 2 kΩ to GND 2.65 2.67 V
L
= 600 Ω to GND 2.55 2.59 V
L
= 2 kΩ to VSY 24 30 mV
L
= 600 Ω to VSY 78 95 mV
L
= VSY or GND ±15 mA
OUT
= VSY/2 165 200 μA
OUT
= 0.5 V to 2.2 V 90 100 dB
OUT
= 0.5 V to 2.2 V 85 95 dB
OUT
10 nA
SS
Rev. D | Page 3 of 20
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
DYNAMIC PERFORMANCE
Slew Rate SR RL = 600 Ω, CL = 20 pF, AV = +1 1.1 V/μs R Settling Time to 0.1% tS Step = 0.5 V, RL = 2 kΩ, 600 Ω 1 μs Gain Bandwidth Product GBP RL = 1 MΩ, CL = 35 pF, AV = +1 3.6 MHz Phase Margin ΦM R Turn- On/Tu rn-Off Time RL = 600 Ω 1 μs
NOISE PERFORMANCE
Distortion THD + N AV = −1, RL = 2 kΩ, f = 1 kHz, VIN rms = 0.15 V rms 0.009 %
A
Voltage Noise en p-p f = 0.1 Hz to 10 Hz 3.1 μV p-p Voltage Noise Density en f = 1 kHz 16 nV/√Hz f = 10 kHz 13 nV/√Hz

ELECTRICAL CHARACTERISTICS—5 V OPERATION

VSY = 5 V, VCM = VSY/2, TA = 25°C, unless otherwise specified.
Table 3.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage VOS V
Dual (ADA469x-2) VCM = −0.1 V to +3.9 V; −40°C < TA < +125°C 3.5 mV Quad (ADA469x-4) VCM = −0.1 V to +3.9 V; −40°C < TA < +125°C 4.0 mV
Offset Voltage Drift ΔVOS/ΔT −40°C < TA < +125°C 1 4 μV/°C
Input Bias Current IB 0.5 5 pA
−40°C < TA < +125°C 360 pA Input Offset Current IOS 1 8 pA
−40°C < TA < +125°C 260 pA Input Voltage Range −40°C < TA < +125°C −0.3 +3.9 V Common-Mode Rejection Ratio CMRR VCM = −0.3 V to +3.9 V 75 98 dB
V
Large Signal Voltage Gain AVO R
−40°C < TA < +85°C 80 dB
−40°C < TA < +125°C 70 dB
R
Input Capacitance
Differential Mode C
Common Mode C Logic High Voltage (Enabled) VIH −40°C < TA < +125°C 2.0 V Logic Low Voltage (Power-Down) VIL −40°C < TA < +125°C 0.8 V Logic Input Current (Per Pin) IIN −40°C < TA < +125°C, 0 V ≤ VSD ≤ 2.7 V 1 μA
2.5 pF
INDM
7 pF
INCM
= 2 kΩ, CL = 20 pF, AV = +1 1.4 V/μs
L
= 1 MΩ, CL = 35 pF, AV = +1 49 Degrees
L
= −1, RL = 600 Ω, f = 1 kHz, VIN rms = 0.15 V rms 0.01
A
V
= +1, RL = 2 kΩ, f = 1 kHz, VIN rms = 0.15 V rms 0.006 %
V
= +1, RL = 600 Ω, f = 1 kHz, VIN rms = 0.15 V rms 0.009
A
V
= −0.3 V to +3.9 V 0.5 2.5 mV
CM
= −0.1 V to +3.9 V; −40°C < TA < +125°C 68 dB
CM
= 2 kΩ, VO = 0.5 V to 4.5 V, VCM = 0 V 95 110 dB
L
= 600 Ω, VO = 0.5 V to 4.5 V, VCM = 0 V 90 100 dB
L
%
%
Rev. D | Page 4 of 20
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
OUTPUT CHARACTERISTICS
Output Voltage High VOH R
−40°C TA ≤ +125°C 4.90 V R
−40°C TA ≤ +125°C 4.80 V Output Voltage Low VOL R
−40°C TA ≤ +125°C 50 mV R
−40°C TA ≤ +125°C 155 mV Short-Circuit Limit ISC V Closed-Loop Output Impedance Z
ADA4691-2, f = 1 MHz, AV = −100 364 Ω
OUT
ADA4691-2, f = 1 MHz, AV = −100 246 Ω Output Pin Leakage Current −40°C < TA < +125°C, shutdown active, VSD = VSS 10 nA
POWER SUPPLY
Power Supply Rejection Ratio PSRR VSY = 2.7 V to 5.5 V 80 90 dB
−40°C TA ≤ +125°C 75 dB Supply Current Per Amplifier ISY V
−40°C TA ≤ +125°C 275 μA
Supply Current Shutdown Mode ISD All amplifiers shut down, VSD = V
−40°C TA ≤ +125°C 2 μA
DYNAMIC PERFORMANCE
Slew Rate SR RL = 2 kΩ, 600 Ω, CL = 20 pF, AV = +1 1.3 V/μs Settling Time to 0.1% tS V Gain Bandwidth Product GBP RL = 1 MΩ, CL = 35 pF, AV = +1 3.6 MHz Phase Margin ΦM R Turn- On/Tu rn-Off Time RL = 600 Ω 1 μs
NOISE PERFORMANCE
Distortion THD + N AV = −1, RL = 2 kΩ, f = 1 kHz, VIN rms = 0.8 V rms 0.006 %
Voltage Noise en p-p f = 0.1 Hz to 10 Hz 3.2 μV p-p Voltage Noise Density en f = 1 kHz 16 nV/√Hz e
f = 10 kHz 13 nV/√Hz
n
= 2 kΩ 4.95 4.97 V
L
= 600 Ω to GND 4.85 4.88 V
L
= 2 kΩ 30 35 mV
L
= 600 Ω 100 110 mV
L
= VSY or GND ±55 mA
OUT
= VSY/2 180 225 μA
OUT
10 nA
SS
= 2 V step, RL = 2 kΩ or 600 Ω 1.5 μs
IN
= 1 MΩ, CL = 35 pF, AV = +1 52 Degrees
L
= −1, RL = 600 Ω, f = 1 kHz, VIN rms = 0.8 V rms 0.008 %
A
V
= +1, RL = 2 kΩ, f = 1 kHz, VIN rms = 0.8 V rms 0.001 %
A
V
= +1, RL = 600 Ω, f = 1 kHz, VIN rms = 0.8 V rms 0.003 %
A
V
Rev. D | Page 5 of 20
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4

ABSOLUTE MAXIMUM RATINGS

Table 4.
Parameter Rating
Supply Voltage 6 V Input Voltage VSS − 0.3 V to VDD + 0.3 V Input Current1 ±10 mA Shutdown Pin Rise/Fall Times 50 μs maximum Differential Input Voltage2 ±VSY Output Short-Circuit Duration to GND Indefinite Temperature
Storage Temperature Range −65°C to +150°C Operating Temperature Range −40°C to +125°C Junction Temperature Range −65°C to +150°C Lead Temperature (Soldering, 60 sec) 300°C
1
Input pins have clamp diodes to the supply pins. Limit the input current to
10 mA or less whenever the input signal exceeds the power supply rail by 0.3 V.
2
Differential input voltage is limited to 6 V or the supply voltage, whichever
is less.
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

THERMAL RESISTANCE

θJA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages and measured using a standard 4-layer board, unless otherwise specified.
Table 5. Thermal Resistance
Package Type θJA θ
8-Lead SOIC_N (R-8) 120 45 °C/W 8-Lead LFCSP (CP-8-6) 125 40 °C/W 9-Ball WLCSP (CB-9-3) 77 N/A1 °C/W 10-Lead LFCSP (CP-10-11) 115 40 °C/W 16-Lead LFCSP (CP-16-22) 75 12 °C/W 14-Lead TSSOP (RU-14) 112 35 °C/W
1
N/A = not applicable.

ESD CAUTION

Unit
JC
Rev. D | Page 6 of 20
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4
A
A

PIN CONFIGURATIONS

BALL A1 CORNER
OUT B V+ OUT A
A3
A2
A1
–IN B SD A/B –IN A
B3
B2
B1
+IN B V– +IN A
C3
C2
C1
ADA4691-2
TOP VIEW
(BALL SIDE DOW N)
Not to Scale
07950-058
Figure 3. 9-Ball Wafer Level Chip Scale WLCSP (CB-9-3)
V+
OUT
9
10
1
–IN A +IN
2 3
V–
ADA4691-2
TOP VIEW
(Not to S cale)
4
SD A
OUT B
8
–IN B
7 6
+IN B
5
SD B
07950-002
Figure 4. 10-Lead, 2 mm × 2 mm LFCSP (CP-10-11)
Figure 6. 8-Lead, 2 mm × 2 mm LFCSP (CP-8-6)
1OUT A
ADA4692-2
2–IN A
TOP VIEW
(Not to S cale)
3+IN A
4V–
8V+ 7OUT B 6 –IN B 5 +IN B
OUT A
–IN +IN
V–
1
ADA4692-2
2 3
TOP VIEW
(Not to Scale)
4
8 7 6 5
Figure 7. 8-Lead SOIC_N (R-8)
1
1
OUT A
–IN A +IN A
+IN B –IN B
OUT B
V+
2
2
3
3
ADA4692-4
TOP VIEW
TOP VIEW
4
4
(Not to Scale)
(Not to Scale)
5
5 6
6
7
7
14
14
13
13
12
12
11
11
10
10
9
9
8
8
Figure 8. 14-Lead TSSOP (RU-14)
V+ OUT B –IN B +IN B
OUT D –IN D +IN D V– +IN C –IN C OUT C
07950-016
07950-001
07950-059
–IN A
OUT A
OUT D
16
1
+IN A
2
V+
ADA4691-4
3
+IN B
4
–IN B
5
OUT B
TOP VIEW
NOTES
1. IT IS RECOMMENDED THAT THE EXPOSED PAD BE CONNCECTED TO V–.
(Not to S cale)
–IN D 13
15
14
12
+IN D
11
V–
10
+IN C
9
–IN C
8
7
6 A/B
OUT C
SD
SD C/D
07950-060
Figure 5. 16-Lead, 3 mm × 3 mm LFCSP (CP-16-22)
Rev. D | Page 7 of 20
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4

TYPICAL PERFORMANCE CHARACTERISTICS

TA = 25°C, unless otherwise noted.
350
ADA4692-2 V
= 2.7V
SY
T
= 25°C
300
A
–0.3V V
250
+1.6V
CM
SIGNIFIES CENTER OF BIN
700
ADA4692-2 V
SY
T
= 25°C
600
A
–0.3V V
SIGNIFIES CENTER OF BIN
500
= 5V
+3.9V
CM
200
150
100
NUMBER OF AMPLIFIERS
50
0
–2.0 –1.6 –1.2 –0.8 –0.4 0 0.4 0.8 1.2 1.6 2.0
VOS (mV)
Figure 9. Input Offset Voltage Distribution
30
25
20
15
10
NUMBER OF AMPL IFIERS
5
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4
TCVOS (µV/°C)
ADA4692-2 V
= ±1.35V
SY
–40°C < T
SIGNIFIES CENTER OF BIN
Figure 10. Input Offset Voltage Drift Distribution
2.0
1.5
1.0
ADA4692-2 V
= 2.7V
SY
T
= 25°C
A
< +125°C
A
400
300
200
NUMBER OF AMPLIFIERS
100
0
–2.0 –1.6 –1.2 –0.8 –0.4 0 0.4 0.8 1.2 1.6 2.0
07950-003
VOS (mV)
07950-006
Figure 12. Input Offset Voltage Distribution
30
25
20
15
10
NUMBER OF AMPL IFIERS
5
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4
07950-004
TCVOS (µV/°C)
ADA4692-2 V
= ±2.5V
SY
–40°C < T
< +125°C
A
SIGNIFIES CENTER OF BIN
07950-007
Figure 13. Input Offset Voltage Drift Distribution
2.0
1.5
1.0
ADA4692-2 V
= 5V
SY
T
= 25°C
A
0.5
(mV)
0
OS
V
–0.5
–1.0
–1.5
–2.0
–0.5 2.52.01.51.00.50
VCM (V)
Figure 11. Input Offset Voltage vs. Common-Mode Voltage
07950-005
Rev. D | Page 8 of 20
0.5
(mV)
0
OS
V
–0.5
–1.0
–1.5
–2.0
–0.5 5.02.02.53.03.54.04.51.51.00.50
VCM (V)
Figure 14. Input Offset Voltage vs. Common-Mode Voltage
07950-008
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4
1k
ADA4692-2 V
= ±1.35V
SY
T
= 25°C
A
AVERAGE 20 CHANNELS
100
1k
ADA4692-2 V
= ±2.5V
SY
T
= 25°C
A
AVERAGE 20 CHANNELS
100
10
(pA)
B
I
1
0.1
0.01 25 12511510595857565554535
TEMPERATURE ( °C)
Figure 15. Input Bias Current vs. Temperature
(pA)
B
I
100
0.1
0.01
0.001
1k
10
1
02.72.42.11.81.51.20.90.60.3
ADA4692-2 V AVERAGE 20 CHANNELS
SY
TA = 125°C
TA = 85°C
TA = 25°C
= 2.7V
VCM (V)
Figure 16. Input Bias Current vs. Common-Mode Voltage
10k
ADA4692-2 V
= ±1.35V
SY
V
= (V+) – V
1k
100
10
1
OH
(SOURCING)
OUT
TA = +125°C
TA = +85°C
TA = +25°C
TA = –40°C
10
(pA)
B
I
1
0.1
0.01 25 12511510595857565554535
07950-009
TEMPERATURE ( °C)
07950-012
Figure 18. Input Bias Current vs. Temperature
1k
TA = 125°C
100
10
(pA) I
07950-010
TA = 85°C
B
1
TA = 25°C
0.1
0.01
054.54.03.53.02.52.01.51.00.5
ADA4692-2 V
= 5V
SY
AVERAGE 20 CHANNELS
VCM (V)
.0
07950-013
Figure 19. Input Bias Current vs. Common-Mode Voltage
10k
ADA4692-2 V
= ±2.5V
SY
V
= (V+) – V
1k
100
10
1
OH
(SOURCING)
OUT
TA = +125°C
TA = +85°C
TA = +25°C
TA = –40°C
0.1
OUTPUT SATURATION VO LTAGE (mV)
0.01
0.001 1001010.10.01
Figure 17. Output Voltage (V
I
(mA)
LOAD
) to Supply Rail vs. Load Current
OH
07950-011
Rev. D | Page 9 of 20
0.1
OUTPUT SATURATION VO LTAGE (mV)
0.01
0.001 1001010.10.01
Figure 20. Output Voltage (V
I
(mA)
LOAD
) to Supply Rail vs. Load Current
OH
07950-014
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4
10k
ADA4692-2 V
= ±1.35V
SY
V
= V
– (V–)
OL
(SINKING)
OUT
TA = +125°C
TA = +85°C
TA = +25°C
TA = –40°C
1k
100
10
1
10k
1k
100
10
ADA4692-2 V
SY
V
OL
(SINKING)
1
= ±2.5V = V
OUT
– (V–)
TA = +125°C
TA = +85°C
TA = +25°C
TA = –40°C
0.1
OUTPUT SAT URATION VOLTAGE (mV)
0.01
0.001 1001010.10.01
Figure 21. Output Voltage (V
I
(mA)
LOAD
) to Supply Rail vs. Load Current
OL
120
100
80
60
40
20
GAIN (dB)
0
–20
ADA4692-2 V
= ±1.35V
SY
–40
T
= 25°C
A
A
= –1
V
–60
1k 10M1M100k10k
= 20pF
C
L
FREQUENCY (Hz)
Figure 22. Open-Loop Gain and Phase vs. Frequency
50
AV = +100
40
= 200pF
C
L
120
100
80
60
40
20
0
–20
–40
–60
PHASE (Degrees)
0.1
OUTPUT SAT URATION VOLTAGE (mV)
0.01
0.001 1001010.10.01
07950-015
Figure 24. Output Voltage (V
I
(mA)
LOAD
) to Supply Rail vs. Load Current
OL
07950-018
120
100
80
60
40
20
GAIN (dB)
0
–20
ADA4692-2 V
= ±2.5V
SY
–40
T
= 25°C
A
A
= –1
V
–60
1k 10M1M100k10k
07950-021
= 20pF
C
L
FREQUENCY (Hz)
= 200pF
C
L
120
100
80
60
40
20
0
–20
–40
–60
PHASE (Degrees)
07950-024
Figure 25. Open-Loop Gain and Phase vs. Frequency
50
AV = +100
40
30
AV = +10
20
10
AV = +1
GAIN (dB)
0
–10
ADA4692-2 V
= ±1.35V
SY
–20
T
= 25°C
A
R
= 600
L
–30
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Figure 23. Closed-Loop Gain vs. Frequency
07950-022
Rev. D | Page 10 of 20
30
AV = +10
20
10
AV = +1
GAIN (dB)
0
–10
ADA4692-2 V
= ±2.5V
SY
–20
T
= 25°C
A
R
= 600
L
–30
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Figure 26. Closed-Loop Gain vs. Frequency
07950-025
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4
1k
1k
100
AV = –100
10
(Ω)
OUT
AV = –10
Z
1
0.1
0.01 100 1k 10k 100k 1M 10M
AV = –1
FREQUENCY (Hz)
ADA4692-2 V
= ±1.35V
SY
T
= 25°C
A
Figure 27. Output Impedance vs. Frequency
120
100
80
60
CMRR (dB)
40
20
ADA4692-2 V
= ±1.35V
SY
T
= 25°C
A
0
100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Figure 28. CMRR vs. Frequency
100
PSRR–
100
AV = –100
10
(Ω)
AV = –10
OUT
Z
1
AV = –1
0.1
0.01 100 1k 10k 100k 1M 10M
07950-023
FREQUENCY (Hz)
ADA4692-2 V
= ±2.5V
SY
T
= 25°C
A
07950-026
Figure 30. Output Impedance vs. Frequency
120
100
80
60
CMRR (dB)
40
20
ADA4692-2 V
= ±2.5V
SY
T
= 25°C
A
0
100 1k 10k 100k 1M 10M
07950-027
FREQUENCY (Hz)
07950-030
Figure 31. CMRR vs. Frequency
100
PSRR+
80
PSRR+
60
40
PSRR (dB)
20
0
ADA4692-2 V
= ±1.35V
SY
T
= 25°C
A
–20
100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Figure 29. PSRR vs. Frequency
07950-028
Rev. D | Page 11 of 20
80
PSRR–
60
40
PSRR (dB)
20
0
ADA4692-2 V
= ±2.5V
SY
T
= 25°C
A
–20
100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Figure 32. PSRR vs. Frequency
07950-031
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4
1k
1k
100
VOLTAGE NOISE DENSI TY (nV/ Hz )
ADA4692-2 V
= ±1.35V
SY
T
= 25°C
A
10
0.1 1 10 100 1k 10k FREQUENCY (Hz)
Figure 33. Voltage Noise Density vs. Frequency
50
ADA4692-2 V
= ±1.35V
SY
45
V
= 100mV p-p
IN
A
= +1
V
40
R
= 2k
L
T
= 25°C
A
35
30
25
20
OVERSHOOT (%)
15
10
5
0
10 100 1k
OVERSHOOT+
OVERSHOOT–
CAPACITANCE (pF)
Figure 34. Small Signal Overshoot vs. Load Capacitance
100
VOLTAGE NOISE DENSI TY (nV/ Hz )
ADA4692-2 V
= ±2.5V
SY
T
= 25°C
A
10
0.1 1 10 100 1k 10k
07950-029
FREQUENCY (Hz)
07950-032
Figure 36. Voltage Noise Density vs. Frequency
45
ADA4692-2 V
= ±2.5V
SY
40
V
= 100mV p-p
IN
A
= +1
V
35
R
= 2k
L
T
= 25°C
A
30
25
20
OVERSHOOT (%)
15
10
5
0
10 100 1k
07950-033
OVERSHOOT+
CAPACITANCE (pF)
OVERSHOOT–
07950-036
Figure 37. Small Signal Overshoot vs. Load Capacitance
OUTPUT (500mV/DIV)
ADA4692-2 V
= ±1.35V
SY
GAIN = +1 R
= 2k
L
C
= 300pF
L
T
= 25°C
A
TIME (2µs/DIV)
Figure 35. Large Signal Transient Response
07950-034
Rev. D | Page 12 of 20
OUTPUT (500mV/DIV)
ADA4692-2 V
= ±2.5V
SY
GAIN = +1 R
= 2kΩ,
L
C
= 300pF
L
T
= 25°C
A
TIME (2µs/DIV)
Figure 38. Large Signal Transient Response
07950-037
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4
T
OUTPUT (20mV /DIV)
ADA4692-2 V
= ±1.35V
SY
GAIN = +1 R
= 2k
L
C
= 200pF
L
T
= 25°C
A
TIME (2µs/DIV)
Figure 39. Small Signal Transient Response
OUTPUT (1µV/DIV)
ADA4692-2 V
= ±1.35V
SY
GAIN = +1M T
= 25°C
A
TIME (1s/DIV)
Figure 40. 0.1 Hz to 10 Hz Noise
250
ADA4692-2
T
200
= +85°C
A
TA = +125°C
OUTPUT (20mV /DIV)
07950-035
ADA4692-2 V
= ±2.5V
SY
GAIN = +1 R
= 2k
L
C
= 200pF
L
T
= 25°C
A
TIME (2µs/DIV)
07950-038
Figure 42. Small Signal Transient Response
OUTPUT (1µV/DIV)
ADA4692-2 V
= ±2.5V
SY
GAIN = +1M T
= 25°C
A
7950-040
TIME (1s/DIV)
07950-043
Figure 43. 0.1 Hz to 10 Hz Noise
250
ADA4692-2
225
= +25°C
T
150
100
/CHANNEL (µA)
SY
I
50
0
05.04.54.03.53.02.52.01.51.00.5 VSY (V)
A
T
= –40°C
A
Figure 41. Supply Current per Amplifier vs. Supply Voltage
07950-135
Rev. D | Page 13 of 20
200
= ±2.5V
V
SY
175
/AMPLIFIER (µA)
SY
I
150
125
–40 1251109580655035205–10–25
V
= ±1.35V
SY
TEMPERATURE (°C)
Figure 44. Supply Current per Channel vs. Temperature
07950-138
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4
1
ADA4692-2 V
= ±1.35V
SY
A
= –1
V
T
= 25°C
A
1
ADA4692-2 V
SY
A
V
T
A
= ±2.5V
= –1
= 25°C
0.1
RL = 600
THD + N (%)
0.01
0.001 10 100 1k 10k 20k
FREQUENCY (Hz)
R
L
Figure 45. THD + Noise vs. Frequency
50mV/DIV
ADA4692-2 V
= ±1.35V
SY
T
= 25°C
A
1V/DIV
TIME (4µs/DIV)
Figure 46. Positive Overload Recovery
= 2k
0.1
RL = 600
THD + N (%)
0.01
0.001 10 100 1k 10k 20k
07950-042
FREQUENCY (Hz)
R
= 2k
L
07950-045
Figure 48. THD + Noise vs. Frequency
50mV/DIV
ADA4692-2 V
= ±2.5V
SY
A
= –100
V
T
= 25°C
A
07950-050
1V/DIV
TIME (4µs/DIV)
07950-051
Figure 49. Positive Overload Recovery
50mV/DIV
1V/DIV
ADA4692-2 V
= ±1.35V
SY
T
= 25°C
A
TIME (4µs/DIV)
Figure 47. Negative Overload Recovery
07950-052
Rev. D | Page 14 of 20
50mV/DIV
1V/DIV
ADA4692-2 V
SY
A
= –100
V
T
= 25°C
A
TIME (4µs/DIV)
Figure 50. Negative Overload Recovery
= ±2.5V
07950-053
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4
ERROR BAND
ERROR BAND
80
CS (dB) = 20 log (V
–90
V
–100
–110
200mV/DIV
10mV/DIV
TIME (1µs/DIV)
Figure 51. Positive Settling Time to 0.1%
200mV/DIV
10mV/DIV
TIME (1µs/DIV)
Figure 52. Negative Settling Time to 0.1%
R3 600
0
5
R1
100k
U2
V–
6
V–
7
V+
0
V+
/100 = VIN)
OUT
V+
3
U1
V+
+
2
IN
V–
0
V–
ADA4692-2 V
SY
R
L
T
A
ADA4692-2 V
SY
R
L
T
A
R2
1k
= ±1.35V = 2k = 25°C
= ±1.35V = 2k = 25°C
0
1V/DIV
20mV/DIV
ADA4692-2 V
= ±2.5V
SY
R
= 2k
ERROR BAND
07950-054
TIME (1µs/DIV)
L
T
A
= 25°C
07950-055
Figure 54. Positive Settling Time to 0.1%
1V/DIV
ERROR BAND
20mV/DIV
ADA4692-2 V
= ±2.5V
SY
R
= 2k
L
T
= 25°C
A
07950-056
TIME (1µs/DIV)
07950-057
Figure 55. Negative Settling Time to 0.1%
–120
CHANNEL SEPARATI ON (dB)
–130
–140
100 1k 10k 100k
ADA4692-2 V
SY
V
IN
A
V
T
A
FREQUENCY (Hz)
= ±2.5V
= 2.8V p- p = +1 = 25°C
07950-140
Figure 53. Channel Separation (CS) vs. Frequency
Rev. D | Page 15 of 20
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4
V

SHUTDOWN OPERATION

INPUT PIN CHARACTERISTICS

The ADA4691-2 has a classic CMOS logic inverter input for each shutdown pin, as shown in Figure 56.
DD
P-CHANNEL
OUTPUT
INPUT
Figure 56. CMOS Inverter
With slowly changing inputs, the top transistor and bottom transistor may be slightly on at the same time, increasing the supply current. This can be avoided by driving the input with a digital logic output having fast rise and fall times. Figure 57 through Figure 59 show the supply current for both sections switching simultaneously with rise times of 1 μs, 10 μs, and 1 ms. Clearly, the rise and fall times should be faster than 10 μs. Using an RC time constant to enable/disable shutdown is not recommended.
= 196mV/1k = 196µA
I
SY
SD A, SD B
DUT OUTPUT
Figure 57. Shutdown Pin Rise Time = 1 μs
= 192mV/1k = 196µA
I
SY
N-CHANNEL
TIME (400µ s/ DI V )
7950-149
07950-150
SD A, SD B
I
= 724mV/1k = 724µ A
SY
DUT OUTPUT
TIME (400µ s/ DI V )
07950-152
Figure 59. Shutdown Pin Rise Time = 1 ms

INPUT THRESHOLD

The input threshold is approximately 1.2 V above the V− pin when operating on ground and 5 V and 0.9 V when operating on 2.7 V (see Figure 60 and Figure 61). The threshold is relatively stable over temperature. For operation on split supplies, the logic swing may have to be level shifted.
500
ADA4691-2 T
= 25°C
A
450
V
= 5V
SY
400
350
300
250
(µA)
SY
I
200
150
100
50
0
054.54.03.53.02.52.01.51.00.5
Figure 60. Supply Current vs. Temperature, V
300
ADA4691-2 V
= 2.7V
SY
250
TA = +125°C
T
= –40°C
A
SD VOLTAGE (V)
TA = +85°C
= +25°C
T
A
= 5 V
SY
.0
07950-155
200
150
SD A, SD B
DUT OUTPUT
TIME (400µ s/ DI V )
07950-151
Figure 58. Shutdown Pin Rise Time = 10 μs
(µA)
SY
I
100
50
0
022.42.11.81.51.20.90.60.3
Figure 61. Supply Current vs. Temperature, V
TA = +125°C
= –40°C
T
A
SD VOLTAGE (V)
TA = +85°C
TA = +25°C
= 2.7 V
SY
.7
07950-156
Rev. D | Page 16 of 20
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4

OUTLINE DIMENSIONS

PIN 1
INDICATOR
0.80
0.75
0.70
SEATING
PLANE
3.10
3.00 SQ
2.90
0.50
BSC
0.50
0.40
0.30
0.05 MAX
0.02 NOM
0.20 REF
0.30
0.23
0.18
13
12
9
8
BOTTOM VIEWTOP VIEW
COPLANARITY
0.08
N
I
1
P
D
C
I
A
N
I
16
1
EXPOSED
PAD
5
FOR PROPER CONNECTIONOF THE EXPOSED PAD, REFER TO THE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS SECTION OF THIS DATASHEET.
1.75
1.60 SQ
1.45
4
0.25 MIN
R
O
T
COMPLIANTTOJEDEC STANDARDS MO-220-WEED-6.
08-16-2010-E
Figure 62. 16-Lead Lead Frame Chip Scale Package [LFCSP_WQ]
3 mm × 3 mm Body, Very Very Thin Quad
(CP-16-22)
Dimensions shown in millimeters
0.645
0.600
0.555 SEATING
PLANE
0.287
0.267
0.247
0.05 NOM COPLANARITY
0.40
BSC
BOTTOM VIEW
(BALL SIDE UP)
123
A
B
C
91709-A
BALL A1
IDENTIFIER
1.250
1.210
1.170
TOP VIEW
(BALL SIDE DOWN)
1.260
1.220
1.180
0.415
0.400
0.385
0.230
0.200
0.170
Figure 63. 9-Ball Wafer Level Chip Scale Package [WLCSP]
(CB-9-3)
Dimensions shown in millimeters
Rev. D | Page 17 of 20
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4
2.00
PIN 1 INDEX
AREA
0.60
0.55
0.50
SEATING
PLANE
BSC SQ
TOP VIEW
0.50 BSC
0.30
0.25
0.18
0.05 MAX
0.02 NOM COPLANARITY
0.20 REF
0.50
0.45
0.40
0.05
8
6
BOTTOM VIEW
1
P
N
I
R
O
C
I
A
T
N
I
109
5
4
D
1
3
081308-D
Figure 64. 10-Lead Lead Frame Chip Scale Package [LFCSP_UQ]
2 mm × 2 mm Body, Ultra Thin Quad
(CP-10-11)
Dimensions shown in millimeters
0.65
0.60
0.55
0.30
0.25
0.18
5
4
BOTTOM VIEW
0.50 BSC
8
1
1
P
N
I
R
C
A
O
T
N
I
D
I
PIN 1 INDEX
AREA
2.00
BSC SQ
TOP VIEW
0.60
0.55
0.50
SEATING
PLANE
0.05 MAX
0.02 NOM
0.20 REF
062409-A
Figure 65. 8-Lead Lead Frame Chip Scale Package [LFCSP_UD]
2 mm × 2 mm Body, Ultra Thin, Dual Lead
(CP-8-6)
Dimensions shown in millimeters
Rev. D | Page 18 of 20
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4
4.00 (0.1574)
3.80 (0.1497)
0.25 (0.0098)
0.10 (0.0040)
COPLANARITY
0.10
CONTROLLING DIMENSIONS ARE INMILLIMETERS; INCH DIMENSIONS (IN PARENTHESES)ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLYAND ARE NOT APPROPRIATE FOR USE IN DESIGN.
5.00(0.1968)
4.80(0.1890)
85
1
1.27 (0.0500)
SEATING
PLANE
COMPLIANT TO JEDEC STANDARDS MS-012-AA
BSC
6.20 (0.2441)
5.80 (0.2284)
4
1.75 (0.0688)
1.35 (0.0532)
0.51 (0.0201)
0.31 (0.0122)
8° 0°
0.25 (0.0098)
0.17 (0.0067)
0.50 (0.0196)
0.25 (0.0099)
1.27 (0.0500)
0.40 (0.0157)
45°
012407-A
Figure 66. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-8)
Dimensions shown in millimeters and (inches)
5.10
5.00
4.90
4.50
4.40
4.30
PIN 1
1.05
1.00
0.80
0.15
0.05
COPLANARITY
0.10
14
1
0.65 BSC
0.30
0.19
COMPLIANT TO JEDEC S T ANDARDS M O-153-AB-1
8
6.40 BSC
7
1.20
0.20
MAX
SEATING PLANE
0.09 8°
0.75
0.60
0.45
061908-A
Figure 67. 14-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-14)
Dimensions shown in millimeters
Rev. D | Page 19 of 20
ADA4691-2/ADA4691-4/ADA4692-2/ADA4692-4

ORDERING GUIDE

Model1 Temperature Range Package Description Package Option Branding
ADA4691-2ACBZ-R7 −40°C to +125°C 9-Ball WLCSP CB-9-3 A2C ADA4691-2ACBZ-RL −40°C to +125°C 9-Ball WLCSP CB-9-3 A2C ADA4691-2ACPZ-R7 −40°C to +125°C 10-Lead LFCSP_UQ CP-10-11 A2 ADA4691-2ACPZ-RL −40°C to +125°C 10-Lead LFCSP_UQ CP-10-11 A2 ADA4691-4ACPZ-R2 −40°C to +125°C 16-Lead LFCSP_WQ CP-16-22 A2P ADA4691-4ACPZ-R7 −40°C to +125°C 16-Lead LFCSP_WQ CP-16-22 A2P ADA4691-4ACPZ-RL −40°C to +125°C 16-Lead LFCSP_WQ CP-16-22 A2P ADA4692-2ACPZ-R7 −40°C to +125°C 8-Lead LFCSP_UD CP-8-6 A3 ADA4692-2ACPZ-RL −40°C to +125°C 8-Lead LFCSP_UD CP-8-6 A3 ADA4692-2ARZ −40°C to +125°C 8-Lead SOIC_N R-8 ADA4692-2ARZ-R7 −40°C to +125°C 8-Lead SOIC_N R-8 ADA4692-2ARZ-RL −40°C to +125°C 8-Lead SOIC_N R-8 ADA4692-4ARUZ −40°C to +125°C 14-Lead TSSOP RU-14 ADA4692-4ARUZ-RL −40°C to +125°C 14-Lead TSSOP RU-14
1
Z = RoHS Compliant Part.
©2009–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07950-0-11/10(D)
Rev. D | Page 20 of 20
Loading...