AD ADA4692-2ARZ Dual, low power, wideband, low noise, rail-to-rail output, operational amplifier Datasheet

Dual, Low Power, Wideband, Low Noise,
Rail-to-Rail Output, Operational Amplifiers
ADA4691-2/ADA4692-2
+IN 3
TOP VIEW
(Not to Scale)
V– 4
8
V+
7
OUT B
6
–IN B
5
+IN B
07950-001
ADA4692-2
–IN A 1
+IN A 2
V– 3
9 V+
Figure 1. 8-Lead SOIC_N (R-8)
ADA4691-2
TOP VIEW
(Not to Scale)
8 OUT B
7 –IN B
6 +IN B
07950-002
Portable audio: MP3, PDA, smart phone, notebook
Portable instrumentation
Portable medical devices
Photodiode amplifiers
Sensor amplifiers
Low-side current sense
ADC drivers
Active filters
Sample-and-hold
Automotive sensors
–IN 2
SD B 5
APPLICATIONS
OUT A 1
10 OUT A
Low power: 200 μA typical, 250 μA maximum
Low distortion: 0.003% THD + N
Low noise: 16 nV/√Hz typical
3.9 MHz bandwidth
Slew rate: 1.4 V/μs typical
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
PIN CONFIGURATIONS
SD A 4
FEATURES
Figure 2. 10-Lead LFCSP (CP-10-11)
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.
Applications for these amplifiers include consumer audio
personal players with low noise and low distortion that provide
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.
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 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 Analog Devices, Inc. All rights reserved.
ADA4691-2/ADA4692-2
TABLE OF CONTENTS
Features .............................................................................................. 1
Thermal Resistance .......................................................................6
Applications ....................................................................................... 1
ESD Caution...................................................................................6
Pin Configurations ........................................................................... 1
Typical Performance Characteristics ..............................................7
General Description ......................................................................... 1
Shutdown Operation ...................................................................... 15
Revision History ............................................................................... 2
Input Pin Characteristics ........................................................... 15
Specifications..................................................................................... 3
Input Threshold .......................................................................... 15
Electrical Characteristics—2.7 V Operation ............................ 3
Outline Dimensions ....................................................................... 16
Electrical Characteristics—5 V Operation................................ 4
Ordering Guide .......................................................................... 16
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
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
ADA4691
ADA4692
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
ADA4691
ADA4692
Large Signal Voltage Gain
ADA4691
ADA4692
ADA4691
ADA4692
Offset Voltage Drift
Input Capacitance
Differential Mode
Common Mode
Logic High Voltage (Enabled)
Logic Low Voltage (Power-Down)
Logic Input Current (Per Pin)
OUTPUT CHARACTERISTICS
Output Voltage High
Output Voltage Low
Symbol
Test Conditions/Comments
VOS
VCM = −0.3 V to +1.6 V
VCM = −0.1 V to +1.6 V; −40°C < TA < +125°C
Min
IB
Typ
Max
Unit
0.5
2.5
3.5
5
350
325
5
225
+1.6
mV
mV
pA
pA
pA
pA
pA
V
dB
dB
dB
dB
dB
0.5
−40°C < TA < +125°C
−40°C < TA < +125°C
IOS
CMRR
AVO
∆VOS/∆T
CIN
CINDM
CINCM
VIH
VIL
IIN
VOH
VOL
Short-Circuit Current
Closed-Loop Output Impedance
Output Pin Leakage Current
POWER SUPPLY
Power Supply Rejection Ratio
ISC
ZOUT
Supply Current Per Amplifier
ADA4691-2
ADA4692-2
Supply Current Shutdown Mode
ISY
PSRR
ISD
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
−40°C < TA < +125°C
RL = 600 Ω, VOUT = 0.5 V to 2.2 V
−40°C < TA < +125°C
−0.3
70
62
70
90
80
85
67
73
85
90
100
dB
95
0.8
3
dB
μV/°C
0.5
1
pF
pF
V
V
μA
2.5
7
−40°C < TA < +125°C
−40°C < TA < +125°C
−40°C < TA < +125°C, 0 V ≤ VSD ≤ 2.7 V
+1.6
RL = 2 kΩ to GND
−40°C < TA < +125°C
RL = 600 Ω to GND
−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
2.65
2.6
2.55
2.5
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
Rev. A | Page 3 of 16
2.67
2.59
24
78
30
40
95
125
±15
372
1
90
165
200
240
225
10
2
V
V
V
V
mV
mV
mV
mV
mA
Ω
nA
dB
dB
μA
μA
μA
nA
μA
ADA4691-2/ADA4692-2
Parameter
DYNAMIC PERFORMANCE
Slew Rate
Slew Rate
Settling Time to 0.1%
Gain Bandwidth Product
ADA4691
Gain Bandwidth Product
ADA4692
Phase Margin
Turn-on, Turn-off time
NOISE PERFORMANCE
Distortion
Voltage Noise
Voltage Noise Density
Symbol
Test Conditions/Comments
SR
SR
tS
GBP
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
3.6
V/μs
V/μs
μs
MHz
GBP
RL = 1 MΩ, CL = 35 pF, AV = +1
3.9
MHz
ΦM
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
f = 10 kHz
0.01
0.006
0.007
3.1
16
13
%
%
%
μV p-p
nV/√Hz
nV/√Hz
en p-p
en
Min
Typ
Max
Unit
ELECTRICAL CHARACTERISTICS—5 V OPERATION
VSY = 5 V, VCM = VSY/2, TA = 25°C, unless otherwise specified.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
Symbol
Test Conditions/Comments
VOS
VCM = −0.3 V to +3.9 V
VCM = −0.1 V to +3.9 V; −40°C < TA < +125°C
Min
IB
Typ
Max
Unit
0.5
2.5
3.5
5
360
5
260
+3.9
4
mV
mV
pA
pA
pA
pA
V
dB
dB
dB
dB
dB
dB
dB
dB
dB
μV/°C
0.8
1
pF
pF
V
V
μA
0.5
−40°C < TA < +125°C
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
ADA4691-2
ADA4629-2
Large Signal Voltage Gain
ADA4691-2
ADA4692-2
ADA4691-2
ADA4692-2
ADA4691-2 and ADA46920-2
Offset Voltage Drift
Input Capacitance
Differential Mode
Common Mode
Logic High Voltage (Enabled)
Logic Low Voltage (Power-Down)
Logic Input Current (Per Pin)
OUTPUT CHARACTERISTICS
Output Voltage High
IOS
CMRR
AVO
∆VOS/∆T
CINDM
CINCM
VIH
VIL
IIN
VOH
1
−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
−40°C < TA < +125°C
RL = 600 Ω, VO = 0.5 V to 4.5 V, VCM = 0 V
−40°C < TA < +125°C
−0.3
75
68
75
95
80
90
75
80
90
98
110
100
1
2.5
7
−40°C < TA < +125°C
−40°C < TA < +125°C
−40°C < TA < +125°C, 0 V ≤ VSD ≤ 2.7 V
+2.0
RL = 2 kΩ
−40°C ≤ TA ≤ +125°C
RL = 600 Ω to GND
4.95
4.90
4.85
Rev. A | Page 4 of 16
4.97
4.88
V
V
V
ADA4691-2/ADA4692-2
Parameter
Output Voltage Low
Symbol
VOL
Short-Circuit Limit
Closed-Loop Output Impedance
Closed-Loop Output Impedance
Output Pin Leakage Current
POWER SUPPLY
Power Supply Rejection Ratio
ISC
ZOUT
ZOUT
Supply Current per Amplifier
ADA4691-2
ADA4692-2
Supply Current Shutdown Mode
ISY
DYNAMIC PERFORMANCE
Slew Rate
Settling Time to 0.1%
Gain Bandwidth Product
Phase Margin
Turn-on, Turn-off time
NOISE PERFORMANCE
Distortion
Voltage Noise
Voltage Noise Density
PSRR
ISD
Test Conditions/Comments
−40°C ≤ TA ≤ +125°C
RL = 2 kΩ
−40°C ≤ TA ≤ +125°C
RL = 600 Ω
−40°C ≤ TA ≤ +125°C
VOUT = VSY or GND
ADA4691-2, f = 1 MHz, AV = −100
ADA4691-2, f = 1 MHz, AV = −100
−40°C < TA < +125°C, shutdown active, VSD = VSS
Min
4.80
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
Typ
Max
28
35
45
110
140
90
±55
364
246
1
90
180
225
275
250
10
2
Unit
V
mV
mV
mV
mV
mA
Ω
Ω
nA
dB
dB
μA
μA
μA
nA
uA
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
μs
MHz
Degrees
μs
THD + N
AV = −1, RL = 2 kΩ, f = 1 kHz, VIN rms = 0.8 V rms
0.008
%
en p-p
en
en
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
Rev. A | Page 5 of 16
ADA4691-2/ADA4692-2
ABSOLUTE MAXIMUM RATINGS
THERMAL RESISTANCE
Table 3.
Parameter
Supply Voltage
Input Voltage
Input Current1
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)
Rating
6V
VSS − 0.3 V to VDD +0.3 V
±10 mA
50 μs maximum
±VSY
Indefinite
−65°C to +150°C
−40°C to +125°C
−65°C to +150°C
300°C
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 4. Thermal Resistance
Package Type
8-Lead SOIC_N (R-8)
10-Lead LFCSP (CP-10-11)
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
θJA
155
88
θJC
45
32
Unit
°C/W
°C/W
ADA4691-2/ADA4692-2
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, unless otherwise noted.
700
ADA4692-2
VSY = 2.7V
T
300
A = 25°C
–0.3V ≤ VCM ≤ +1.6V
SIGNIFIES CENTER
OF BIN
250
NUMBER OF AMPLIFIERS
200
150
100
ADA4692-2
VSY = 5V
T
600
A = 25°C
–0.3V ≤ VCM ≤ +3.9V
SIGNIFIES CENTER
OF BIN
500
400
300
200
07950-003
0
–2.0 –1.6 –1.2 –0.8 –0.4
Figure 3. Input Offset Voltage Distribution
30
15
10
1.2
1.6
2.0
20
15
10
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)
0
07950-004
0
0
1.5
2.0
ADA4692-2
VSY = 2.7V
TA = 25°C
0.5
VOS (mV)
0.5
0
–0.5
–1.0
–1.0
–1.5
–1.5
1.5
2.0
VCM (V)
2.5
–2.0
–0.5
07950-005
1.0
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
4.5
5.0
0
–0.5
0.5
0.8
ADA4692-2
VSY = 5V
TA = 25°C
1.5
1.0
0
0.6
Figure 7. Input Offset Voltage Drift Distribution
1.0
–2.0
–0.5
0.4
TCVOS (µV/°C)
Figure 4. Input Offset Voltage Drift Distribution
2.0
0.2
07950-007
5
5
VOS (mV)
0.8
ADA4692-2
VSY = ±2.5V
–40°C < TA < +125°C
SIGNIFIES CENTER
OF BIN
25
NUMBER OF AMPLIFIERS
NUMBER OF AMPLIFIERS
30
20
0
0.4
Figure 6. Input Offset Voltage Distribution
ADA4692-2
VSY = ±1.35V
–40°C < TA < +125°C
SIGNIFIES CENTER
OF BIN
25
0
VOS (mV)
07950-006
100
50
07950-008
NUMBER OF AMPLIFIERS
350
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
VCM (V)
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
ADA4692-2
VSY = ±1.35V
TA = 25°C
AVERAGE 20 CHANNELS
100
ADA4692-2
VSY = ±2.5V
TA = 25°C
AVERAGE 20 CHANNELS
100
10
0.1
0.1
35
45
55
65
75
85
95
105
115
125
TEMPERATURE (°C)
0.01
25
07950-009
0.01
25
35
45
55
65
75
85
95
105
115
125
4.5
5.0
100
TEMPERATURE (°C)
Figure 9. Input Bias Current vs. Temperature
07950-012
1
07950-013
1
07950-014
IB (pA)
IB (pA)
10
Figure 12. Input Bias Current vs. Temperature
1k
1k
TA = 125°C
TA = 125°C
100
100
TA = 85°C
IB (pA)
10
1
ADA4692-2
VSY = 2.7V
AVERAGE 20 CHANNELS
0
0.3
0.6
0.9
1.2
1.5
1.8
2.1
2.4
2.7
VCM (V)
0.01
OUTPUT SATURATION VOLTAGE (mV)
TA = +125°C
100
TA = +85°C
10
TA = +25°C
TA = –40°C
1
0.1
0.01
0.001
0.01
0.1
1
10
100
1.0
1.5
2.0
ILOAD (mA)
1k
ADA4692-2
VSY = ±2.5V
VOH = (V+) – VOUT
(SOURCING)
2.5
3.0
3.5
4.0
TA = +125°C
100
TA = +85°C
10
TA = +25°C
1
TA = –40°C
0.1
0.01
0.001
07950-011
OUTPUT SATURATION VOLTAGE (mV)
1k
0.5
Figure 13. Input Bias Current vs. Common-Mode Voltage
10k
ADA4692-2
VSY = ±1.35V
VOH = (V+) – VOUT
(SOURCING)
0
VCM (V)
Figure 10. Input Bias Current vs. Common-Mode Voltage
10k
TA = 25°C
0.1
0.01
0.001
TA = 85°C
1
TA = 25°C
0.1
07950-010
IB (pA)
10
ADA4692-2
VSY = 5V
AVERAGE 20 CHANNELS
0.01
0.1
1
10
ILOAD (mA)
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
100
TA = +85°C
10
TA = +25°C
1
TA = –40°C
0.1
0.01
0.1
1
10
100
ILOAD (mA)
TA = +85°C
10
TA = +25°C
1
TA = –40°C
0.1
0.01
0.1
1
10
100
ILOAD (mA)
Figure 15. Output Voltage (VOL) to Supply Rail vs. Load Current
Figure 18. Output Voltage (VOL) to Supply Rail vs. Load Current
120
120
120
100
100
100
100
80
80
80
80
60
60
40
40
20
20
0
0
–60
1k
10k
100k
40
40
20
20
0
0
–20
–20
–40
–40
–60
10M
1M
FREQUENCY (Hz)
–60
1k
–40
10k
100k
–60
10M
1M
FREQUENCY (Hz)
Figure 19. Open-Loop Gain and Phase vs. Frequency
50
50
AV = +100
40
AV = +100
40
30
30
AV = +10
AV = +10
20
GAIN (dB)
20
10
AV = +1
0
10
AV = +1
0
–10
–10
ADA4692-2
VSY = ±1.35V
TA = 25°C
RL = 600Ω
–30
10
100
–20
1k
10k
100k
1M
FREQUENCY (Hz)
10M
ADA4692-2
VSY = ±2.5V
TA = 25°C
RL = 600Ω
–30
10
07950-022
GAIN (dB)
–20
CL = 200pF
ADA4692-2
VSY = ±2.5V
TA = 25°C
AV = –1
Figure 16. Open-Loop Gain and Phase vs. Frequency
–20
60
CL = 20pF
100
1k
10k
100k
1M
FREQUENCY (Hz)
Figure 17. Closed-Loop Gain vs. Frequency
Figure 20. Closed-Loop Gain vs. Frequency
Rev. A | Page 9 of 16
10M
07950-025
–40
CL = 200pF
ADA4692-2
VSY = ±1.35V
TA = 25°C
AV = –1
07950-021
–20
GAIN (dB)
CL = 20pF
PHASE (Degrees)
120
60
GAIN (dB)
TA = +125°C
100
0.01
0.001
07950-015
0.01
0.001
1k
07950-018
TA = +125°C
PHASE (Degrees)
1k
ADA4692-2
VSY = ±2.5V
VOL = VOUT – (V–)
(SINKING)
07950-024
ADA4692-2
VSY = ±1.35V
VOL = VOUT – (V–)
(SINKING)
OUTPUT SATURATION VOLTAGE (mV)
OUTPUT SATURATION VOLTAGE (mV)
10k
ADA4691-2/ADA4692-2
1k
1k
100
100
AV = –100
1
ZOUT (Ω)
ZOUT (Ω)
AV = –100
10
AV = –10
10
AV = –10
1
AV = –1
AV = –1
0.1
ADA4692-2
VSY = ±1.35V
TA = 25°C
1k
10k
100k
1M
10M
FREQUENCY (Hz)
0.01
100
07950-023
0.01
100
120
120
100
100
80
80
60
1M
10M
60
40
20
ADA4692-2
VSY = ±1.35V
TA = 25°C
1k
10k
100k
1M
10M
FREQUENCY (Hz)
ADA4692-2
VSY = ±2.5V
TA = 25°C
0
100
07950-027
0
100
1k
100
10k
100k
1M
10M
1M
10M
FREQUENCY (Hz)
Figure 22. CMRR vs. Frequency
Figure 25. CMRR vs. Frequency
100
PSRR–
80
PSRR+
80
PSRR–
PSRR+
60
PSRR (dB)
60
40
40
20
0
ADA4692-2
VSY = ±1.35V
TA = 25°C
–20
100
1k
10k
100k
FREQUENCY (Hz)
1M
10M
Figure 23. PSRR vs. Frequency
ADA4692-2
VSY = ±2.5V
TA = 25°C
–20
100
1k
10k
100k
FREQUENCY (Hz)
Figure 26. PSRR vs. Frequency
Rev. A | Page 10 of 16
07950-031
20
07950-028
PSRR (dB)
100k
07950-030
40
0
10k
Figure 24. Output Impedance vs. Frequency
CMRR (dB)
CMRR (dB)
1k
FREQUENCY (Hz)
Figure 21. Output Impedance vs. Frequency
20
ADA4692-2
VSY = ±2.5V
TA = 25°C
07950-026
0.1
ADA4691-2/ADA4692-2
100
ADA4692-2
VSY = ±1.35V
TA = 25°C
10
0.1
1
10
100
1k
100
ADA4692-2
VSY = ±2.5V
TA = 25°C
10k
10
0.1
FREQUENCY (Hz)
35
10k
ADA4692-2
VSY = ±2.5V
VIN = 100mV p-p
AV = +1
RL = 2kΩ
TA = 25°C
40
35
30
OVERSHOOT+
25
OVERSHOOT–
20
15
30
OVERSHOOT+
25
20
OVERSHOOT–
15
10
10
100
1k
CAPACITANCE (pF)
0
10
07950-033
0
10
07950-034
TIME (2µs/DIV)
1k
Figure 31. Small Signal Overshoot vs. Load Capacitance
OUTPUT (500mV/DIV)
Figure 28. Small Signal Overshoot vs. Load Capacitance
ADA4692-2
VSY = ±1.35V
GAIN = +1
RL = 2kΩ
CL = 300pF
TA = 25°C
100
CAPACITANCE (pF)
ADA4692-2
VSY = ±2.5V
GAIN = +1
RL = 2kΩ,
CL = 300pF
TA = 25°C
TIME (2µs/DIV)
Figure 29. Large Signal Transient Response
Figure 32. Large Signal Transient Response
Rev. A | Page 11 of 16
07950-036
5
5
OUTPUT (500mV/DIV)
1k
07950-037
OVERSHOOT (%)
45
OVERSHOOT (%)
40
100
Figure 30. Voltage Noise Density vs. Frequency
ADA4692-2
VSY = ±1.35V
VIN = 100mV p-p
AV = +1
RL = 2kΩ
TA = 25°C
45
10
FREQUENCY (Hz)
Figure 27. Voltage Noise Density vs. Frequency
50
1
07950-032
VOLTAGE NOISE DENSITY (nV/ Hz)
1k
07950-029
VOLTAGE NOISE DENSITY (nV/ Hz)
1k
ADA4691-2/ADA4692-2
OUTPUT (20mV/DIV)
ADA4692-2
VSY = ±2.5V
GAIN = +1
RL = 2kΩ
CL = 200pF
TA = 25°C
07950-035
ADA4692-2
VSY = ±1.35V
GAIN = +1
RL = 2kΩ
CL = 200pF
TA = 25°C
TIME (2µs/DIV)
07950-038
OUTPUT (20mV/DIV)
T
TIME (2µs/DIV)
Figure 36. Small Signal Transient Response
OUTPUT (1µV/DIV)
OUTPUT (1µV/DIV)
Figure 33. Small Signal Transient Response
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
250
ADA4692-2
07950-043
ADA4692-2
VSY = ±2.5V
GAIN = +1M
TA = 25°C
07950-040
ADA4692-2
VSY = ±1.35V
GAIN = +1M
TA = 25°C
TA = +125°C
ADA4692-2
TA = +85°C
225
ISY/AMPLIFIER (µA)
TA = +25°C
150
TA = –40°C
100
VSY = ±2.5V
175
VSY = ±1.35V
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
VSY (V)
5.0
125
–40
–25
–10
5
20
35
50
65
80
95
110
TEMPERATURE (°C)
Figure 38. Supply Current per Channel vs. Temperature
Figure 35. Supply Current per Amplifier vs. Supply Voltage
Rev. A | Page 12 of 16
125
07950-138
0
200
150
50
07950-135
ISY/CHANNEL (µA)
200
ADA4691-2/ADA4692-2
1
ADA4692-2
VSY = ±1.35V
AV = –1
TA = 25°C
THD + N (%)
0.1
RL = 2kΩ
0.001
10
100
1k
RL = 2kΩ
0.01
10k
20k
FREQUENCY (Hz)
07950-042
0.01
RL = 600Ω
0.001
10
100
1k
10k
20k
FREQUENCY (Hz)
Figure 42. THD + Noise vs. Frequency
Figure 39. THD + Noise vs. Frequency
50mV/DIV
50mV/DIV
1V/DIV
ADA4692-2
VSY = ±2.5V
AV = –100
TA = 25°C
07950-050
ADA4692-2
VSY = ±1.35V
TA = 25°C
TIME (4µs/DIV)
1V/DIV
TIME (4µs/DIV)
Figure 40. Positive Overload Recovery
Figure 43. Positive Overload Recovery
50mV/DIV
50mV/DIV
1V/DIV
1V/DIV
TIME (4µs/DIV)
ADA4692-2
VSY = ±2.5V
AV = –100
TA = 25°C
07950-052
ADA4692-2
VSY = ±1.35V
TA = 25°C
TIME (4µs/DIV)
Figure 41. Negative Overload Recovery
Figure 44. Negative Overload Recovery
Rev. A | Page 13 of 16
07950-045
RL = 600Ω
07950-051
THD + N (%)
0.1
ADA4692-2
VSY = ±2.5V
AV = –1
TA = 25°C
07950-053
1
ADA4691-2/ADA4692-2
1V/DIV
200mV/DIV
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
TIME (1µs/DIV)
ADA4692-2
VSY = ±2.5V
RL = 2kΩ
TA = 25°C
07950-056
ADA4692-2
VSY = ±1.35V
RL = 2kΩ
TA = 25°C
TIME (1µs/DIV)
Figure 46. Negative Settling Time to 0.1%
–80
CS (dB) = 20 log (VOUT/100 = VIN)
V+
VIN
+
–
0
2
R1
100kΩ
V–
U1
V+
V–
R3
600Ω
V–
0
U2
5
V–
V+
R2
1kΩ
6
7
0
0
V+
–110
–120
ADA4692-2
VSY = ±2.5V
VIN = 2.8V p-p
AV = +1
TA = 25°C
–130
–140
100
1k
10k
FREQUENCY (Hz)
100k
07950-140
CHANNEL SEPARATION (dB)
–100
3
Figure 49. Negative Settling Time to 0.1%
Figure 47. Channel Separation vs. Frequency
Rev. A | Page 14 of 16
07950-057
20mV/DIV
10mV/DIV
–90
ADA4692-2
VSY = ±2.5V
RL = 2kΩ
TA = 25°C
ERROR BAND
07950-054
ADA4692-2
VSY = ±1.35V
RL = 2kΩ
TA = 25°C
ERROR BAND
07950-055
20mV/DIV
10mV/DIV
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
VDD
P-CHANNEL
N-CHANNEL
07950-149
OUTPUT
INPUT
ISY = 724mV/1k = 724µA
Figure 50. CMOS Inverter
DUT OUTPUT
07950-152
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.
TIME (400µs/DIV)
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 relatively stable over temperature. For operation on split supplies,
the logic swing may have to be level shifted.
500
ADA4691-2
450 TA = 25°C
VSY = 5V
400
ISY = 196mV/1k = 196µA
350
TA = +125°C
ISY (µA)
300
SDA, B
TA = +85°C
250
200
150
DUT OUTPUT
07950-150
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
07950-155
50
2.7
07950-156
TIME (400µs/DIV)
TA = +25°C
TA = –40°C
100
SD VOLTAGE (V)
Figure 54. Supply Current vs. Temperature, VSY = 5 V
300
ISY = 192mV/1k = 196µA
ADA4691-2
VSY = 2.7V
250
ISY (µA)
200
SDA, B
DUT OUTPUT
TA = +125°C
TA = +85°C
150
TIME (400µs/DIV)
07950-151
100
TA = +25°C
TA = –40°C
50
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
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
1.27 (0.0500)
BSC
0.25 (0.0098)
0.10 (0.0040)
6.20 (0.2441)
5.80 (0.2284)
0.50 (0.0196)
0.25 (0.0099)
1.75 (0.0688)
1.35 (0.0532)
8°
0°
0.51 (0.0201)
0.31 (0.0122)
COPLANARITY
0.10
SEATING
PLANE
45°
0.25 (0.0098)
0.17 (0.0067)
1.27 (0.0500)
0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-012-A A
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.
012407-A
4.00 (0.1574)
3.80 (0.1497)
Figure 56. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-8)
Dimensions shown in millimeters and (inches)
PIN 1 INDEX
AREA
0.50
0.45
0.40
2.00
BSC SQ
9
8
0.30
0.25
0.18
1
6
3
5
TOP VIEW
0.60
0.55
0.50
PIN 1
INDICATOR
10
4
BOTTOM VIEW
0.05 MAX
0.02 NOM
COPLANARITY
0.05
SEATING
PLANE
0.20 REF
081308-D
0.50
BSC
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
ADA4692-2ARZ 1
ADA4692-2ARZ-R71
ADA4692-2ARZ-RL1
1
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
8-Lead SOIC_N
8-Lead SOIC_N
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
Package Option
CP-10-11
CP-10-11
CP-10-11
R-8
R-8
R-8
Branding Code
A2
A2
A2