ADA4691-2ACPZ-R2 [ADI]
Dual, Low Power, Wideband, Low Noise, Rail-to-Rail Output, Operational Amplifiers; 双通道,低功耗,宽带,低噪声,轨到轨输出运算放大器型号: | ADA4691-2ACPZ-R2 |
厂家: | ADI |
描述: | Dual, Low Power, Wideband, Low Noise, Rail-to-Rail Output, Operational Amplifiers |
文件: | 总16页 (文件大小:672K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Dual, Low Power, Wideband, Low Noise,
Rail-to-Rail Output, Operational Amplifiers
ADA4691-2/ADA4692-2
PIN CONFIGURATIONS
FEATURES
Low power: 200 μA typical, 250 μA maximum
Low distortion: 0.003% THD + N
Low noise: 16 nV/√Hz typical
OUT A
–IN
1
2
3
4
8
7
6
5
V+
ADA4692-2
OUT B
–IN B
+IN B
+IN
TOP VIEW
(Not to Scale)
V–
3.9 MHz bandwidth
Slew rate: 1.4 V/μs typical
Figure 1. 8-Lead SOIC_N (R-8)
Offset voltage: 500 μV typical
Low offset voltage drift: 4 μV/°C maximum
Very low input bias currents: 0.5 pA typical
2.7 V to 5 V single supply or 1.35 V to 2.5 V dual supply
APPLICATIONS
–IN A 1
8 OUT B
ADA4691-2
Portable audio: MP3, PDA, smart phone, notebook
Portable instrumentation
Portable medical devices
Photodiode amplifiers
Sensor amplifiers
+IN A 2
V– 3
7 –IN B
6 +IN B
TOP VIEW
(Not to Scale)
Figure 2. 10-Lead LFCSP (CP-10-11)
Low-side current sense
ADC drivers
Active filters
Sample-and-hold
Automotive sensors
GENERAL DESCRIPTION
The ADA4691-2 and ADA4692-2 are dual, 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. These
amplifiers are ideal for a wide variety of applications. Audio
preamps, filters, IR/photodiode amplifiers, charge amps, and
high impedance sensors all benefit from this combination of
performance features.
enough gain and slew rate response over the audio band at low
power. Industrial applications with high impedance sensors,
such as pyroelectric sensors and other IR sensors, benefit from
the high impedance input, low offset drift, and enough
bandwidth and response for low gain applications.
The ADA4691-2 and ADA4692-2 are specified over the extended
industrial temperature range (−40°C to +125°C). The ADA4691-2
is available in a 10-lead LFCSP package, and the ADA4692-2 is
available in an 8-lead SOIC package.
Applications for these amplifiers include consumer audio
personal players with low noise and low distortion that provide
Rev. A
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 registeredtrademarks arethe property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
www.analog.com
©2009 Analog Devices, Inc. All rights reserved.
ADA4691-2/ADA4692-2
TABLE OF CONTENTS
Features .............................................................................................. 1
Thermal Resistance.......................................................................6
ESD Caution...................................................................................6
Typical Performance Characteristics ..............................................7
Shutdown Operation...................................................................... 15
Input Pin Characteristics........................................................... 15
Input Threshold.......................................................................... 15
Outline Dimensions....................................................................... 16
Ordering Guide .......................................................................... 16
Applications....................................................................................... 1
Pin Configurations ........................................................................... 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
REVISION HISTORY
ADA4691-2/ADA4692-2 Revision History
6/09—Rev. 0 to Rev. A
Added ADA4691-2 Information Throughout.............................. 1
Added Figure 2, Renumbered Subsequent Figures...................... 1
Changes to Table 1............................................................................ 3
Changes to Table 2............................................................................ 4
Changes to Table 4............................................................................ 6
Changes to Captions for Figure 40, Figure 41, Figure 43,
Figure 44 .......................................................................................... 13
Added Shutdown Operations Section ......................................... 15
Updated Outline Dimensions....................................................... 16
Changes to Ordering Guide .......................................................... 16
ADA4692-2 Revision History
3/09—Revision 0: Initial Version
Rev. A | Page 2 of 16
ADA4691-2/ADA4692-2
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS—2.7 V OPERATION
VSY = 2.7 V, VCM = VSY/2, TA = 25°C, unless otherwise specified.
Table 1.
Parameter
Symbol
Test Conditions/Comments
Min
Typ
0.5
Max Unit
INPUT CHARACTERISTICS
Offset Voltage
VOS
IB
VCM = −0.3 V to +1.6 V
VCM = −0.1 V to +1.6 V; −40°C < TA < +125°C
2.5
3.5
5
350
325
5
mV
mV
pA
pA
pA
pA
pA
V
Input Bias Current
ADA4691
ADA4692
0.5
−40°C < TA < +125°C
−40°C < TA < +125°C
Input Offset Current
IOS
1
−40°C < TA < +125°C
−40°C < TA < +125°C
VCM = −0.3 V to +1.6 V
VCM = −0.1 V to +1.6 V; −40°C < TA < +125°C
VCM = −0.1 V to +1.6 V; −40°C < TA < +125°C
RL = 2 kΩ, VOUT = 0.5 V to 2.2 V
−40°C < TA < +85°C
−40°C < TA < +85°C
−40°C < TA < +125°C
225
+1.6
Input Voltage Range
Common-Mode Rejection Ratio
ADA4691
ADA4692
Large Signal Voltage Gain
ADA4691
ADA4692
ADA4691
ADA4692
−0.3
70
62
70
90
80
85
67
73
85
CMRR
AVO
90
100
dB
dB
dB
dB
dB
dB
−40°C < TA < +125°C
RL = 600 Ω, VOUT = 0.5 V to 2.2 V
−40°C < TA < +125°C
95
0.8
dB
Offset Voltage Drift
Input Capacitance
∆VOS/∆T
CIN
3
μV/°C
Differential Mode
Common Mode
CINDM
CINCM
VIH
VIL
IIN
2.5
7
pF
pF
V
V
μA
Logic High Voltage (Enabled)
Logic Low Voltage (Power-Down)
Logic Input Current (Per Pin)
OUTPUT CHARACTERISTICS
Output Voltage High
−40°C < TA < +125°C
−40°C < TA < +125°C
−40°C < TA < +125°C, 0 V ≤ VSD ≤ 2.7 V
+1.6
0.5
1
VOH
RL = 2 kΩ to GND
2.65 2.67
V
−40°C < TA < +125°C
RL = 600 Ω to GND
2.6
V
V
2.55 2.59
−40°C < TA < +125°C
RL = 2 kΩ to VSY
−40°C < TA < +125°C
RL = 600 Ω to VSY
−40°C < TA < +125°C
VOUT = VSY or GND
f = 1 MHz, AV = −100
−40°C < TA < +125°C, shutdown active, VSD = VSS
2.5
24
V
Output Voltage Low
VOL
30
40
95
125
mV
mV
mV
mV
mA
Ω
78
Short-Circuit Current
ISC
ZOUT
15
372
1
Closed-Loop Output Impedance
Output Pin Leakage Current
POWER SUPPLY
nA
Power Supply Rejection Ratio
PSRR
ISY
VS = 2.7 V to 5.5 V
−40°C < TA < +125°C
VOUT = VSY/2
−40°C < TA < +125°C
−40°C < TA < +125°C
All amplifiers shut down, VShutDown = VSS
−40°C < TA < +125°C
80
75
90
dB
dB
μA
μA
μA
nA
ꢀA
Supply Current Per Amplifier
ADA4691-2
ADA4692-2
165
200
240
225
Supply Current Shutdown Mode
ISD
10
2
Rev. A | Page 3 of 16
ADA4691-2/ADA4692-2
Parameter
Symbol
Test Conditions/Comments
Min
Typ
Max Unit
DYNAMIC PERFORMANCE
Slew Rate
Slew Rate
Settling Time to 0.1%
Gain Bandwidth Product
ADA4691
SR
SR
tS
RL = 600 Ω, CL = 20 pF, AV = +1
RL = 2 kΩ, CL = 20 pF, AV = +1
Step = 0.5 V, RL = 2 kΩ, 600 Ω
RL = 1 MΩ, CL = 35 pF, AV = +1
1.1
1.4
1
V/μs
V/μs
ꢀs
GBP
3.6
MHz
Gain Bandwidth Product
ADA4692
Phase Margin
Turn-on, Turn-off time
NOISE PERFORMANCE
Distortion
GBP
ΦM
RL = 1 MΩ, CL = 35 pF, AV = +1
3.9
MHz
RL = 1 MΩ, CL = 35 pF, AV = +1
RL = 600 Ω
49
1
Degrees
μs
THD + N AV = −1, RL = 2 kΩ, f = 1 kHz, VIN rms = 0.15 V rms
0.009
%
AV = −1, RL = 600 Ω, f = 1 kHz, VIN rms = 0.15 V rms
AV = +1, RL = 2 kΩ, f = 1 kHz, VIN rms = 0.15 V rms
AV = +1, RL = 600 Ω, f = 1 kHz, VIN rms = 0.15 V rms
f = 0.1 Hz to 10 Hz
f = 1 kHz
0.01
0.006
0.007
3.1
16
13
%
%
%
μV p-p
nV/√Hz
nV/√Hz
Voltage Noise
Voltage Noise Density
en p-p
en
f = 10 kHz
ELECTRICAL CHARACTERISTICS—5 V OPERATION
VSY = 5 V, VCM = VSY/2, TA = 25°C, unless otherwise specified.
Table 2.
Parameter
Symbol
Test Conditions/Comments
Min
Typ
0.5
0.5
1
Max Unit
INPUT CHARACTERISTICS
Offset Voltage
VOS
IB
VCM = −0.3 V to +3.9 V
VCM = −0.1 V to +3.9 V; −40°C < TA < +125°C
2.5
3.5
5
360
5
mV
mV
pA
pA
pA
pA
V
Input Bias Current
−40°C < TA < +125°C
Input Offset Current
IOS
−40°C < TA < +125°C
−40°C < TA < +125°C
VCM = −0.3 V to +3.9 V
VCM = −0.1 V to +3.9 V; −40°C < TA < +125°C
VCM = −0.1 V to +3.9 V; −40°C < TA < +125°C
RL = 2 kΩ, VO = 0.5 V to 4.5 V, VCM = 0 V
−40°C < TA < +85°C
−40°C < TA < +85°C
−40°C < TA < +125°C
260
+3.9
Input Voltage Range
Common-Mode Rejection Ratio
ADA4691-2
ADA4629-2
Large Signal Voltage Gain
ADA4691-2
ADA4692-2
ADA4691-2
ADA4692-2
−0.3
75
68
75
95
80
90
75
80
90
CMRR
AVO
98
dB
dB
dB
dB
dB
dB
dB
dB
dB
μV/°C
110
−40°C < TA < +125°C
RL = 600 Ω, VO = 0.5 V to 4.5 V, VCM = 0 V
−40°C < TA < +125°C
ADA4691-2 and ADA46920-2
Offset Voltage Drift
Input Capacitance
100
1
∆VOS/∆T
4
Differential Mode
Common Mode
CINDM
CINCM
VIH
VIL
IIN
2.5
7
pF
pF
V
V
μA
Logic High Voltage (Enabled)
Logic Low Voltage (Power-Down)
Logic Input Current (Per Pin)
OUTPUT CHARACTERISTICS
Output Voltage High
−40°C < TA < +125°C
−40°C < TA < +125°C
−40°C < TA < +125°C, 0 V ≤ VSD ≤ 2.7 V
+2.0
0.8
1
VOH
RL = 2 kΩ
−40°C ≤ TA ≤ +125°C
RL = 600 Ω to GND
4.95 4.97
4.90
4.85 4.88
V
V
V
Rev. A | Page 4 of 16
ADA4691-2/ADA4692-2
Parameter
Symbol
Test Conditions/Comments
−40°C ≤ TA ≤ +125°C
Min
Typ
Max Unit
4.80
V
Output Voltage Low
VOL
RL = 2 kΩ
−40°C ≤ TA ≤ +125°C
RL = 600 Ω
−40°C ≤ TA ≤ +125°C
28
35
45
110
140
mV
mV
mV
mV
mA
Ω
90
Short-Circuit Limit
ISC
ZOUT
ZOUT
VOUT = VSY or GND
55
364
246
1
Closed-Loop Output Impedance
Closed-Loop Output Impedance
Output Pin Leakage Current
POWER SUPPLY
ADA4691-2, f = 1 MHz, AV = −100
ADA4691-2, f = 1 MHz, AV = −100
−40°C < TA < +125°C, shutdown active, VSD = VSS
Ω
nA
Power Supply Rejection Ratio
PSRR
ISY
VSY = 2.7 V to 5.5 V
−40°C ≤ TA ≤ +125°C
VOUT = VSY/2
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +125°C
All amplifiers shutdown, VShutDown = VSS
−40°C ≤ TA ≤ +125°C
80
75
90
dB
dB
μA
μA
μA
nA
uA
Supply Current per Amplifier
ADA4691-2
ADA4692-2
180
225
275
250
Supply Current Shutdown Mode
ISD
10
2
DYNAMIC PERFORMANCE
Slew Rate
Settling Time to 0.1%
Gain Bandwidth Product
Phase Margin
Turn-on, Turn-off time
NOISE PERFORMANCE
Distortion
SR
tS
GBP
ΦM
RL = 2 kΩ, 600 Ω, CL = 20 pF, AV = +1
VIN = 2 V step, RL = 2 kΩ or 600 Ω
RL = 1 MΩ, CL = 35 pF, AV = +1
RL = 1 MΩ, CL = 35 pF, AV = +1
RL = 600 Ω
1.3
1.5
3.6
52
1
V/μs
ꢀs
MHz
Degrees
μs
THD + N
AV = −1, RL = 2 kΩ, f = 1 kHz, VIN rms = 0.8 V rms
0.008
%
AV = −1, RL = 600 Ω, f = 1 kHz, VIN rms = 0.8 V rms
AV = +1, RL = 2 kΩ, f = 1 kHz, VIN rms = 0.8 V rms
AV = +1, RL = 600 Ω, f = 1 kHz, VIN rms = 0.8 V rms
f = 0.1 Hz to 10 Hz
f = 1 kHz
f = 10 kHz
0.006
0.003
0.001
3.2
16
13
%
%
%
μV p-p
nV/√Hz
nV/√Hz
Voltage Noise
Voltage Noise Density
en p-p
en
en
Rev. A | Page 5 of 16
ADA4691-2/ADA4692-2
ABSOLUTE MAXIMUM RATINGS
Table 3.
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.
Parameter
Rating
Supply Voltage
Input Voltage
Input Current1
6 V
VSS − 0.3 V to VDD +0.3 V
10 mA
Shutdown Pin Rise/Fall times
Differential Input Voltage2
Output Short-Circuit Duration to GND
Temperature
Storage Temperature Range
Operating Temperature Range
Junction Temperature Range
Lead Temperature (Soldering, 60 sec)
50 μs maximum
VSY
Indefinite
Table 4. Thermal Resistance
Package Type
8-Lead SOIC_N (R-8)
10-Lead LFCSP (CP-10-11)
θJA
155
88
θJC
45
32
Unit
°C/W
°C/W
−65°C to +150°C
−40°C to +125°C
−65°C to +150°C
300°C
ESD CAUTION
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 5 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.
Rev. A | Page 6 of 16
ADA4691-2/ADA4692-2
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, unless otherwise noted.
350
700
600
500
400
300
200
100
0
ADA4692-2
ADA4692-2
V
T
= 2.7V
V
T
= 5V
SY
= 25°C
SY
= 25°C
300
250
200
150
100
50
A
A
–0.3V ≤ V
≤ +1.6V
–0.3V ≤ V
≤ +3.9V
CM
CM
SIGNIFIES CENTER
OF BIN
SIGNIFIES CENTER
OF BIN
–2.0 –1.6 –1.2 –0.8 –0.4
0
0.4
0.8
1.2
1.6
2.0
V
(mV)
OS
Figure 3. Input Offset Voltage Distribution
Figure 6. Input Offset Voltage Distribution
30
25
20
15
10
5
30
25
20
15
10
5
ADA4692-2
ADA4692-2
V
= ±1.35V
V
= ±2.5V
SY
SY
–40°C < T < +125°C
–40°C < T < +125°C
A
A
SIGNIFIES CENTER
OF BIN
SIGNIFIES CENTER
OF BIN
0
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
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
TCV (µV/°C)
OS
TCV (µV/°C)
OS
Figure 4. Input Offset Voltage Drift Distribution
Figure 7. Input Offset Voltage Drift Distribution
2.0
1.5
2.0
1.5
ADA4692-2
ADA4692-2
V
= 2.7V
V
= 5V
SY
= 25°C
SY
T = 25°C
A
T
A
1.0
1.0
0.5
0.5
0
0
–0.5
–1.0
–1.5
–2.0
–0.5
–1.0
–1.5
–2.0
–0.5
0
0.5
1.0
(V)
1.5
2.0
2.5
–0.5
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
(V)
V
V
CM
CM
Figure 5. Input Offset Voltage vs. Common-Mode Voltage
Figure 8. Input Offset Voltage vs. Common-Mode Voltage
Rev. A | Page 7 of 16
ADA4691-2/ADA4692-2
1k
1k
100
10
ADA4692-2
ADA4692-2
V = ±2.5V
V
= ±1.35V
SY
= 25°C
SY
T = 25°C
A
T
A
AVERAGE 20 CHANNELS
AVERAGE 20 CHANNELS
100
10
1
1
0.1
0.1
0.01
0.01
25
35
45
55
65
75
85
95
105 115 125
25
35
45
55
65
75
85
95
105 115 125
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 9. Input Bias Current vs. Temperature
Figure 12. Input Bias Current vs. Temperature
1k
100
10
1k
100
10
T
= 125°C
A
T
= 125°C
A
ADA4692-2
= 5V
V
SY
AVERAGE 20 CHANNELS
T
T
= 85°C
= 25°C
A
T
T
= 85°C
= 25°C
A
1
1
A
0.1
0.1
0.01
A
0.01
0.001
ADA4692-2
= 2.7V
V
SY
AVERAGE 20 CHANNELS
0
0.3
0.6 0.9 1.2 1.5
(V)
1.8
2.1
2.4
2.7
0
0.5
1.0
1.5
2.0
2.5
V (V)
CM
3.0
3.5
4.0
4.5
5.0
V
CM
Figure 10. Input Bias Current vs. Common-Mode Voltage
Figure 13. Input Bias Current vs. Common-Mode Voltage
10k
10k
ADA4692-2
ADA4692-2
V
V
= ±1.35V
= (V+) – V
V
V
= ±2.5V
= (V+) – V
SY
SY
OH
OUT
OH
OUT
1k
100
10
1k
100
10
(SOURCING)
(SOURCING)
T
= +125°C
T
= +125°C
A
A
T
= +85°C
A
T
= +85°C
A
T
= +25°C
A
T
= +25°C
A
T
= –40°C
1
1
A
T
= –40°C
A
0.1
0.1
0.01
0.001
0.01
0.001
0.01
0.1
I
1
10
100
0.01
0.1
I
1
10
100
(mA)
(mA)
LOAD
LOAD
Figure 11. Output Voltage (VOH) to Supply Rail vs. Load Current
Figure 14. Output Voltage (VOH) to Supply Rail vs. Load Current
Rev. A | Page 8 of 16
ADA4691-2/ADA4692-2
10k
1k
10k
1k
ADA4692-2
ADA4692-2
V
V
= ±1.35V
V
V
= ±2.5V
SY
SY
= V
– (V–)
= V – (V–)
OL
OUT
OL
OUT
(SINKING)
(SINKING)
T
= +125°C
T
= +125°C
A
A
100
10
100
10
T
= +85°C
A
T
= +85°C
A
T
= +25°C
A
T
= +25°C
A
1
1
T
= –40°C
A
T
= –40°C
A
0.1
0.01
0.1
0.01
0.001
0.01
0.1
1
10
100
0.001
0.01
0.1
1
10
100
I
(mA)
I
(mA)
LOAD
LOAD
Figure 15. Output Voltage (VOL) to Supply Rail vs. Load Current
Figure 18. Output Voltage (VOL) to Supply Rail vs. Load Current
120
100
80
120
100
80
120
100
80
120
100
80
60
60
60
60
C
= 20pF
C = 20pF
L
L
40
40
40
40
20
20
20
20
0
0
0
0
–20
–40
–60
–20
–40
–60
–20
–40
–60
–20
–40
–60
C
= 200pF
C = 200pF
L
L
ADA4692-2
= ±1.35V
ADA4692-2
V = ±2.5V
SY
V
SY
T
= 25°C
= –1
T
= 25°C
A = –1
V
A
A
A
V
1k
10k
100k
1M
10M
1k
10k
100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 16. Open-Loop Gain and Phase vs. Frequency
Figure 19. Open-Loop Gain and Phase vs. Frequency
50
40
50
40
A
A
A
= +100
= +10
= +1
A
A
A
= +100
= +10
= +1
V
V
V
V
V
V
30
30
20
20
10
10
0
0
–10
–20
–30
–10
–20
–30
ADA4692-2
= ±1.35V
ADA4692-2
V = ±2.5V
SY
V
SY
T
= 25°C
T
= 25°C
A
A
R
= 600Ω
R
= 600Ω
L
L
10
100
1k
10k
100k
1M
10M
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 17. Closed-Loop Gain vs. Frequency
Figure 20. Closed-Loop Gain vs. Frequency
Rev. A | Page 9 of 16
ADA4691-2/ADA4692-2
1k
1k
100
10
100
A
= –100
A
= –100
V
V
10
1
A
= –10
= –1
V
A
= –10
V
1
A
V
A
= –1
V
0.1
0.1
ADA4692-2
= ±1.35V
ADA4692-2
V = ±2.5V
V
SY
= 25°C
SY
T = 25°C
A
T
A
0.01
100
0.01
1k
10k
100k
1M
10M
10M
10M
100
1k
10k
100k
1M
10M
10M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 21. Output Impedance vs. Frequency
Figure 24. Output Impedance vs. Frequency
120
100
80
60
40
20
0
120
100
80
60
40
20
0
ADA4692-2
= ±1.35V
ADA4692-2
V = ±2.5V
V
SY
= 25°C
SY
T = 25°C
A
T
A
100
1k
10k
100k
1M
100
1k
10k
100k
1M
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 22. CMRR vs. Frequency
Figure 25. CMRR vs. Frequency
100
80
60
40
20
0
100
80
60
40
20
0
PSRR–
PSRR+
PSRR–
PSRR+
ADA4692-2
= ±1.35V
ADA4692-2
V = ±2.5V
V
SY
= 25°C
SY
T = 25°C
A
T
A
–20
100
–20
1k
10k
100k
1M
100
1k
10k
100k
1M
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 23. PSRR vs. Frequency
Figure 26. PSRR vs. Frequency
Rev. A | Page 10 of 16
ADA4691-2/ADA4692-2
1k
100
10
1k
100
10
ADA4692-2
= ±1.35V
ADA4692-2
V = ±2.5V
V
SY
= 25°C
SY
T = 25°C
A
T
A
0.1
1
10
100
1k
10k
0.1
1
10
100
1k
10k
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 27. Voltage Noise Density vs. Frequency
Figure 30. Voltage Noise Density vs. Frequency
50
45
40
35
30
25
20
15
10
5
45
40
35
30
25
20
15
10
5
ADA4692-2
ADA4692-2
V
V
A
R
= ±1.35V
= 100mV p-p
= +1
V
V
A
R
= ±2.5V
= 100mV p-p
= +1
SY
SY
IN
IN
V
L
V
L
= 2kΩ
= 2kΩ
T
= 25°C
T
= 25°C
A
A
OVERSHOOT+
OVERSHOOT+
OVERSHOOT–
OVERSHOOT–
0
10
0
10
100
1k
100
1k
CAPACITANCE (pF)
CAPACITANCE (pF)
Figure 28. Small Signal Overshoot vs. Load Capacitance
Figure 31. Small Signal Overshoot vs. Load Capacitance
ADA4692-2
ADA4692-2
V
= ±1.35V
V
= ±2.5V
SY
GAIN = +1
SY
GAIN = +1
R
C
T
= 2kΩ
= 300pF
= 25°C
R
C
T
= 2kΩ,
= 300pF
= 25°C
L
L
L
L
A
A
TIME (2µs/DIV)
TIME (2µs/DIV)
Figure 29. Large Signal Transient Response
Figure 32. Large Signal Transient Response
Rev. A | Page 11 of 16
ADA4691-2/ADA4692-2
T
ADA4692-2
ADA4692-2
V = ±2.5V
V
= ±1.35V
SY
SY
GAIN = +1
GAIN = +1
R
C
= 2kΩ
= 200pF
= 25°C
R
C
= 2kΩ
= 200pF
= 25°C
L
L
L
L
T
T
A
A
TIME (2µs/DIV)
TIME (2µs/DIV)
Figure 36. Small Signal Transient Response
Figure 33. Small Signal Transient Response
ADA4692-2
= ±2.5V
ADA4692-2
= ±1.35V
V
V
SY
GAIN = +1M
= 25°C
SY
GAIN = +1M
= 25°C
T
T
A
A
TIME (1s/DIV)
TIME (1s/DIV)
Figure 37. 0.1 Hz to 10 Hz Noise
Figure 34. 0.1 Hz to 10 Hz Noise
250
225
200
175
150
125
250
200
150
100
50
ADA4692-2
ADA4692-2
T
= +125°C
A
T
= +85°C
A
T
T
= +25°C
= –40°C
A
V
= ±2.5V
SY
A
V
= ±1.35V
SY
0
–40 –25 –10
5
20
35
50
65
80
95 110 125
0
0.5
1.0
1.5
2.0
2.5
(V)
3.0
3.5
4.0
4.5
5.0
TEMPERATURE (°C)
V
SY
Figure 38. Supply Current per Channel vs. Temperature
Figure 35. Supply Current per Amplifier vs. Supply Voltage
Rev. A | Page 12 of 16
ADA4691-2/ADA4692-2
1
1
ADA4692-2
= ±1.35V
ADA4692-2
V = ±2.5V
SY
V
SY
A
= –1
A
= –1
V
A
V
A
T
= 25°C
T
= 25°C
0.1
0.1
R
= 600Ω
R = 600Ω
L
L
R
= 2kΩ
R = 2kΩ
L
L
0.01
0.001
0.01
0.001
10
100
1k
10k 20k
10
100
1k
FREQUENCY (Hz)
10k 20k
FREQUENCY (Hz)
Figure 39. THD + Noise vs. Frequency
Figure 42. THD + Noise vs. Frequency
50mV/DIV
50mV/DIV
1V/DIV
1V/DIV
ADA4692-2
= ±2.5V
ADA4692-2
= ±1.35V
V
SY
V
A
T
= –100
= 25°C
SY
= 25°C
V
A
T
A
TIME (4µs/DIV)
TIME (4µs/DIV)
Figure 40. Positive Overload Recovery
Figure 43. Positive Overload Recovery
50mV/DIV
1V/DIV
50mV/DIV
1V/DIV
ADA4692-2
ADA4692-2
V
A
= ±2.5V
= –100
SY
V
T
= ±1.35V
SY
= 25°C
V
T
= 25°C
A
A
TIME (4µs/DIV)
TIME (4µs/DIV)
Figure 41. Negative Overload Recovery
Figure 44. Negative Overload Recovery
Rev. A | Page 13 of 16
ADA4691-2/ADA4692-2
1V/DIV
200mV/DIV
20mV/DIV
10mV/DIV
ADA4692-2
ADA4692-2
V
= ±1.35V
= 2kΩ
= 25°C
V
= ±2.5V
= 2kΩ
= 25°C
SY
SY
ERROR BAND
R
T
R
T
L
L
ERROR BAND
A
A
TIME (1µs/DIV)
TIME (1µs/DIV)
Figure 45. Positive Settling Time to 0.1%
Figure 48. Positive Settling Time to 0.1%
200mV/DIV
1V/DIV
ERROR BAND
ERROR BAND
20mV/DIV
10mV/DIV
ADA4692-2
ADA4692-2
V
R
= ±1.35V
= 2kΩ
V
R
= ±2.5V
= 2kΩ
SY
SY
L
L
T
= 25°C
T
= 25°C
A
A
TIME (1µs/DIV)
TIME (1µs/DIV)
Figure 46. Negative Settling Time to 0.1%
Figure 49. Negative Settling Time to 0.1%
–80
–90
R1
CS (dB) = 20 log (VOUT/100 = VIN
V+
)
100kΩ
V–
R2
1kΩ
3
U2
6
7
U1
5
V+
V–
+
–
V–
V+
VIN
2
R3
600Ω
0
–100
–110
–120
–130
–140
0
0
V–
V+
0
ADA4692-2
V
V
= ±2.5V
= 2.8V p-p
= +1
SY
IN
A
V
A
T
= 25°C
100
1k
10k
FREQUENCY (Hz)
100k
Figure 47. Channel Separation vs. Frequency
Rev. A | Page 14 of 16
ADA4691-2/ADA4692-2
SHUTDOWN OPERATION
INPUT PIN CHARACTERISTICS
The ADA4691-2 has a classic CMOS logic inverter input for
each shutdown pin, as shown in Figure 50.
SDA, B
V
DD
P-CHANNEL
OUTPUT
N-CHANNEL
INPUT
I
= 724mV/1k = 724µA
SY
Figure 50. CMOS Inverter
DUT OUTPUT
TIME (400µs/DIV)
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 51
through Figure 53 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 us.
Using an RC time constant to enable/disable shutdown is not
recommended.
Figure 53. 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 54 and Figure 55). The threshold is rela-
tively stable over temperature. For operation on split supplies,
the logic swing may have to be level shifted.
500
ADA4691-2
T
V
= 25°C
450
400
350
300
250
200
150
100
50
A
= 5V
SY
I
= 196mV/1k = 196µA
SY
T
= +125°C
A
T
= +85°C
A
SDA, B
DUT OUTPUT
T
= +25°C
A
T
= –40°C
A
TIME (400µs/DIV)
0
Figure 51. Shutdown Pin Rise Time = 1 μs
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
SD VOLTAGE (V)
Figure 54. Supply Current vs. Temperature, VSY = 5 V
300
250
200
150
100
50
ADA4691-2
V
= 2.7V
SY
I
= 192mV/1k = 196µA
SY
T
= +125°C
A
T
= +85°C
A
SDA, B
DUT OUTPUT
T
= +25°C
A
T
= –40°C
A
TIME (400µs/DIV)
Figure 52. Shutdown Pin Rise Time = 10 μs
0
0
0.3
0.6
0.9
1.2
1.5
1.8
2.1
2.4
2.7
SD VOLTAGE (V)
Figure 55. Supply Current vs. Temperature, VSY = 2.7 V
Rev. A | Page 15 of 16
ADA4691-2/ADA4692-2
OUTLINE DIMENSIONS
5.00 (0.1968)
4.80 (0.1890)
8
1
5
4
6.20 (0.2441)
5.80 (0.2284)
4.00 (0.1574)
3.80 (0.1497)
0.50 (0.0196)
0.25 (0.0099)
1.27 (0.0500)
BSC
45°
1.75 (0.0688)
1.35 (0.0532)
0.25 (0.0098)
0.10 (0.0040)
8°
0°
0.51 (0.0201)
0.31 (0.0122)
COPLANARITY
0.10
1.27 (0.0500)
0.40 (0.0157)
0.25 (0.0098)
0.17 (0.0067)
SEATING
PLANE
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 56. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-8)
Dimensions shown in millimeters and (inches)
0.50
0.45
0.40
2.00
BSC SQ
PIN 1 INDEX
AREA
PIN 1
INDICATOR
9
10
8
6
1
3
0.30
0.25
0.18
5
BOTTOM VIEW
4
TOP VIEW
0.60
0.55
0.50
0.05 MAX
0.02 NOM
COPLANARITY
0.05
SEATING
PLANE
0.50
BSC
0.20 REF
Figure 57. 10-Lead Lead Frame Chip Scale Package [LFCSP_UQ]
2 mm × 2 mm Body, Ultra Thin Quad
(CP-10-11)
Dimensions shown in millimeters
ORDERING GUIDE
Model
ADA4691-2ACPZ-R71
ADA4691-2ACPZ-RL1
ADA4691-2ACPZ-R21
ADA4692-2ARZ1
Temperature Range
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
Package Description
10-Lead_LFCSP_UQ
10-Lead_LFCSP_UQ
10-Lead_LFCSP_UQ
8-Lead SOIC_N
Package Option
CP-10-11
CP-10-11
CP-10-11
R-8
Branding Code
A2
A2
A2
ADA4692-2ARZ-R71
ADA4692-2ARZ-RL1
8-Lead SOIC_N
8-Lead SOIC_N
R-8
R-8
1 Z = RoHS Compliant Part.
©2009 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D07950-0-6/09(A)
Rev. A | Page 16 of 16
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