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Data Sheet
FEATURES
Low power
Supply current 800 µA/amplifier
Fully specified at +2.7 V, +5 V, and ±5 V supplies
High speed and fast settling on 5 V
80 MHz, −3 dB bandwidth (G = +1)
30 V/µs slew rate
125 ns settling time to 0.1%
Rail-to-rail input and output
No phase reversal with input 0.5 V beyond supplies
Input CMVR extends beyond rails by 200 mV
Output swing to within 20 mV of either rail
Low distortion
−62 dB @ 1 MHz, V
O
= 2 V p-p
−86 dB @ 100 kHz, V
O
= 4.6 V p-p
Output current: 15 mA
High grade option: V
OS
(maximum) = 1.5 mV
NC
1
–IN
2
+IN
3
–V
S 4
2.7 V, 800 µA, 80 MHz
Rail-to-Rail I/O Amplifiers
AD8031/AD8032
CONNECTION DIAGRAMS
8
NC
+V
S
OUT
NC
01056-001
OUT1
1
–IN1
2
+IN1
3
–V
S 4
AD8032
– +
+ –
8
7
6
5
+V
S
OUT2
01056-002
–
+
7
6
5
–IN2
+IN2
AD8031
NC = NO CONNECT
Figure 1. 8-Lead PDIP (N) and
SOIC_N (R)
Figure 2. 8-Lead PDIP (N),
SOIC_N (R), and MSOP (RM)
V
OUT 1
–V
S 2
AD8031
5
+V
S
+IN
3
4
–IN
Figure 3. 5-Lead SOT-23 (RJ-5)
APPLICATIONS
High speed, battery-operated systems
High component density systems
Portable test instruments
A/D buffers
Active filters
High speed, set-and-demand amplifiers
Operating on supplies from +2.7 V to +12 V and dual supplies
up to ±6 V, the AD8031/AD8032 are ideal for a wide range of
applications, from battery-operated systems with large bandwidth
requirements to high speed systems where component density
requires lower power dissipation. The AD8031/AD8032 are
available in 8-lead PDIP and 8-lead SOIC_N packages and
operate over the industrial temperature range of −40°C to
+85°C. The AD8031A is also available in the space-saving
5-lead SOT-23 package, and the AD8032A is available in an
8-lead MSOP package.
V
IN
= 4.85V p-p
V
OUT
= 4.65V p-p
G = +1
GENERAL DESCRIPTION
The AD8031 (single) and AD8032 (dual) single-supply, voltage
feedback amplifiers feature high speed performance with
80 MHz of small signal bandwidth, 30 V/µs slew rate, and 125 ns
settling time. This performance is possible while consuming less
than 4.0 mW of power from a single 5 V supply. These features
increase the operation time of high speed, battery-powered
systems without compromising dynamic performance.
The products have true single-supply capability with rail-to-rail
input and output characteristics and are specified for +2.7 V, +5 V,
and ±5 V supplies. The input voltage range can extend to 500 mV
beyond each rail. The output voltage swings to within 20 mV of
each rail providing the maximum output dynamic range.
The AD8031/AD8032 also offer excellent signal quality for only
800 µA of supply current per amplifier; THD is −62 dBc with a
2 V p-p, 1 MHz output signal, and –86 dBc for a 100 kHz,
4.6 V p-p signal on +5 V supply. The low distortion and fast
settling time make them ideal as buffers to single-supply ADCs.
Rev. E
Document Feedback
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.
1V/DIV
1V/DIV
01056-004
01056-003
+
–
2µs/DIV
2µs/DIV
Figure 4. Input V
IN
+5V
–
Figure 5. Output V
OUT
V
OUT
1kΩ
1.7pF
+2.5V
01056-006
V
IN
+
Figure 6. Rail-to-Rail Performance at 100 kHz
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
01056-005
AD8031/AD8032
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Connection Diagrams ...................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
+2.7 V Supply ................................................................................ 3
+5 V Supply ................................................................................... 4
±5 V Supply ................................................................................... 5
Absolute Maximum Ratings ............................................................ 6
Maximum Power Dissipation ..................................................... 6
ESD Caution .................................................................................. 6
Typical Performance Characteristics ............................................. 7
Data Sheet
Theory of Operation ...................................................................... 13
Input Stage Operation................................................................ 13
Overdriving the Input Stage...................................................... 13
Output Stage, Open-Loop Gain and Distortion vs. Clearance
from Power Supply ..................................................................... 14
Output Overdrive Recovery ...................................................... 14
Driving Capacitive Loads .......................................................... 15
Applications..................................................................................... 16
A 2 MHz Single-Supply, Biquad Band-Pass Filter ................. 16
High Performance, Single-Supply Line Driver........................... 16
Outline Dimensions ....................................................................... 18
Ordering Guide .......................................................................... 20
REVISION HISTORY
6/13—Rev. D to Rev. E
Changes to DC Performance Parameter, Table 1 ......................... 3
Updated Outline Dimensions ....................................................... 19
Changes to Ordering Guide .......................................................... 20
11/08—Rev. C to Rev. D
Change to Table 3 Column Heading .............................................. 5
Change to Ordering Guide ............................................................ 20
7/06—Rev. B to Rev. C
Updated Format .................................................................. Universal
Updated Outline Dimensions ....................................................... 18
Change to Ordering Guide ............................................................ 20
9/99—Rev. A to Rev. B
Rev. E | Page 2 of 20
Data Sheet
SPECIFICATIONS
+2.7 V SUPPLY
@ T
A
= 25°C, V
S
= 2.7 V, R
L
= 1 kΩ to 1.35 V, R
F
= 2.5 kΩ, unless otherwise noted.
Table 1.
Parameter
DYNAMIC PERFORMANCE
–3 dB Small Signal Bandwidth
Slew Rate
Settling Time to 0.1%
DISTORTION/NOISE PERFORMANCE
Total Harmonic Distortion
Input Voltage Noise
Input Current Noise
Crosstalk (AD8032 Only)
DC PERFORMANCE
Input Offset Voltage
Offset Drift
Input Bias Current
Input Offset Current
Open-Loop Gain
INPUT CHARACTERISTICS
Common-Mode Input Resistance
Differential Input Resistance
Input Capacitance
Input Voltage Range
Input Common-Mode Voltage Range
Common-Mode Rejection Ratio
Differential Input Voltage
OUTPUT CHARACTERISTICS
Output Voltage Swing Low
Output Voltage Swing High
Output Voltage Swing Low
Output Voltage Swing High
Output Current
Short Circuit Current
Capacitive Load Drive
POWER SUPPLY
Operating Range
Quiescent Current per Amplifier
Power Supply Rejection Ratio
V
CM
= 0 V to 2.7 V
V
CM
= 0 V to 1.55 V
46
58
Conditions
G = +1, V
O
< 0.4 V p-p
G = −1, V
O
= 2 V step
G = −1, V
O
= 2 V step, C
L
= 10 pF
f
C
= 1 MHz, V
O
= 2 V p-p, G = +2
f
C
= 100 kHz, V
O
= 2 V p-p, G = +2
f = 1 kHz
f = 100 kHz
f = 1 kHz
f = 5 MHz
V
CM
= V
CC
/2; V
OUT
= 1.35 V
T
MIN
to T
MAX
V
CM
= V
CC
/2; V
OUT
= 1.35 V
V
CM
= V
CC
/2; V
OUT
= 1.35 V
T
MIN
to T
MAX
V
CM
= V
CC
/2; V
OUT
= 0.35 V to 2.35 V
T
MIN
to T
MAX
76
74
AD8031A/AD8032A
Min Typ
Max
54
25
80
30
125
−62
−86
15
2.4
5
−60
±1
±6
10
0.45
50
80
±6
±10
2
2.2
500
76
74
AD8031/AD8032
AD8031B/AD8032B
Min Typ
Max
54
25
80
30
125
−62
−86
15
2.4
5
−60
±0.5
±1.6
10
0.45
50
80
±1.5
±2.5
2
2.2
500
Unit
MHz
V/µs
ns
dBc
dBc
nV/√Hz
pA/√Hz
pA/√Hz
dB
mV
mV
µV/°C
µA
µA
nA
dB
dB
MΩ
kΩ
pF
V
V
dB
dB
V
V
V
V
V
mA
mA
mA
pF
40
280
1.6
−0.5 to
+3.2
−0.2 to
+2.9
64
74
3.4
46
58
40
280
1.6
−0.5 to
+3.2
−0.2 to
+2.9
64
74
3.4
R
L
= 10 kΩ
R
L
= 1 kΩ
0.05
2.6
0.15
2.55
Sourcing
Sinking
G = +2 (See Figure 46)
2.7
V
S
− = 0 V to −1 V or
V
S
+ = +2.7 V to +3.7 V
75
0.02
2.68
0.08
2.6
15
21
−34
15
12
1250
0.05
2.6
0.15
2.55
0.02
2.68
0.08
2.6
15
21
−34
15
12
1250
2.7
75
750
86
750
86
V
μA
dB
Rev. E | Page 3 of 20
AD8031/AD8032
+5 V SUPPLY
@ T
A
= 25°C, V
S
= 5 V, R
L
= 1 kΩ to 2.5 V, R
F
= 2.5 kΩ, unless otherwise noted.
Table 2.
Parameter
DYNAMIC PERFORMANCE
−3 dB Small Signal Bandwidth
Slew Rate
Settling Time to 0.1%
DISTORTION/NOISE PERFORMANCE
Total Harmonic Distortion
Input Voltage Noise
Input Current Noise
Differential Gain
Differential Phase
Crosstalk (AD8032 Only)
DC PERFORMANCE
Input Offset Voltage
Offset Drift
Input Bias Current
Input Offset Current
Open-Loop Gain
INPUT CHARACTERISTICS
Common-Mode Input Resistance
Differential Input Resistance
Input Capacitance
Input Voltage Range
Input Common-Mode Voltage Range
Common-Mode Rejection Ratio
Differential Input Voltage
OUTPUT CHARACTERISTICS
Output Voltage Swing Low
Output Voltage Swing High
Output Voltage Swing Low
Output Voltage Swing High
Output Current
Short Circuit Current
Capacitive Load Drive
POWER SUPPLY
Operating Range
Quiescent Current per Amplifier
Power Supply Rejection Ratio
V
CM
= 0 V to 5 V
V
CM
= 0 V to 3.8 V
56
66
Conditions
G = +1, V
O
< 0.4 V p-p
G = −1, V
O
= 2 V step
G = −1, V
O
= 2 V step, C
L
= 10 pF
f
C
= 1 MHz, V
O
= 2 V p-p, G = +2
f
C
= 100 kHz, V
O
= 2 V p-p, G = +2
f = 1 kHz
f = 100 kHz
f = 1 kHz
R
L
= 1 kΩ
R
L
= 1 kΩ
f = 5 MHz
V
CM
= V
CC
/2; V
OUT
= 2.5 V
T
MIN
to T
MAX
V
CM
= V
CC
/2; V
OUT
= 2.5 V
V
CM
= V
CC
/2; V
OUT
= 2.5 V
T
MIN
to T
MAX
V
CM
= V
CC
/2; V
OUT
= 1.5 V to 3.5 V
T
MIN
to T
MAX
76
74
AD8031A/AD8032A
Min Typ
Max
54
27
80
32
125
−62
−86
15
2.4
5
0.17
0.11
−60
±1
±6
5
0.45
50
82
±6
±10
1.2
2.0
350
76
74
Data Sheet
AD8031B/AD8032B
Min Typ
Max
54
27
80
32
125
−62
−86
15
2.4
5
0.17
0.11
−60
±0.5
±1.6
5
0.45
50
82
±1.5
±2.5
1.2
2.0
250
Unit
MHz
V/µs
ns
dBc
dBc
nV/√Hz
pA/√Hz
pA/√Hz
%
Degrees
dB
mV
mV
µV/°C
µA
µA
nA
dB
dB
MΩ
kΩ
pF
V
V
dB
dB
V
V
V
V
V
mA
mA
mA
pF
40
280
1.6
−0.5 to
+5.5
−0.2 to
+5.2
70
80
3.4
56
66
40
280
1.6
−0.5 to
+5.5
−0.2 to
+5.2
70
80
3.4
R
L
= 10 kΩ
R
L
= 1 kΩ
0.05
4.95
0.2
4.8
Sourcing
Sinking
G = +2 (See Figure 46)
2.7
V
S
− = 0 V to −1 V or
V
S
+ = +5 V to +6 V
75
0.02
4.98
0.1
4.9
15
28
−46
15
12
1400
0.05
4.95
0.2
4.8
0.02
4.98
0.1
4.9
15
28
−46
15
12
1400
2.7
75
800
86
800
86
V
µA
dB
Rev. E | Page 4 of 20
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