ad822.pdf

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11023712 UNPDF
a
Single Supply, Rail-to-Rail
Low Power FET-Input Op Amp
AD822
FEATURES
TRUE SINGLE SUPPLY OPERATION
Output Swings Rail to Rail
Input Voltage Range Extends Below Ground
Single Supply Capability from +3 V to +36 V
Dual Supply Capability from 6 1.5 V to 6 18 V
HIGH LOAD DRIVE
Capacitive Load Drive of 350 pF, G = 1
Minimum Output Current of 15 mA
EXCELLENT AC PERFORMANCE FOR LOW POWER
800 m A Max Quiescent Current per Amplifier
Unity Gain Bandwidth: 1.8 MHz
Slew Rate of 3.0 V/ m s
GOOD DC PERFORMANCE
800 m V Max Input Offset Voltage
2 m V/ 8 C Typ Offset Voltage Drift
25 pA Max Input Bias Current
LOW NOISE
13 nV/ Ö Hz @ 10 kHz
NO PHASE INVERSION
CONNECTION DIAGRAM
8-Pin Plastic DIP, Cerdip and SOIC
70
60
V S = 0V, 5V
50
40
30
20
10
0
–0.5
–0.4
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
0.4
0.5
OFFSET VOLTAGE – mV
capability with an input voltage range extending below the
negative rail, allowing the AD822 to accommodate input signals
below ground in the single supply mode. Output voltage swing
extends to within 10 mV of each rail providing the maximum
output dynamic range.
Offset voltage of 800 mV max, offset voltage drift of 2 mV/°C,
input bias currents below 25 pA and low input voltage noise
provide dc precision with source impedances up to a Gigaohm.
1.8 MHz unity gain bandwidth, –93 dB THD at 10 kHz and
3 V/ms slew rate are provided with a low supply current of
800 mA per amplifier. The AD822 drives up to 350 pF of direct
capacitive load as a follower, and provides a minimum output
current of 15 mA. This allows the amplifier to handle a wide
range of load conditions. This combination of ac and dc
performance, plus the outstanding load drive capability, results
in an exceptionally versatile amplifier for the single supply user.
The AD822 is available in four performance grades. The A and
B grades are rated over the industrial temperature range of
–40°C to +85°C. There is also a 3 volt grade—the AD822A-3V,
rated over the industrial temperature range. The mil grade is
rated over the military temperature range of –55°C to +125°C
and is available processed on standard military drawing.
The AD822 is offered in three varieties of 8-pin package: plastic
DIP, hermetic cerdip and surface mount (SOIC) as well as die
form.
APPLICATIONS
Battery Powered Precision Instrumentation
Photodiode Preamps
Active Filters
12- to 14-Bit Data Acquisition Systems
Medical Instrumentation
Low Power References and Regulators
PRODUCT DESCRIPTION
The AD822 is a dual precision, low power FET input op
amp that can operate from a single supply of +3.0 V to 36 V,
or dual supplies of ± 1.5 V to ± 18 V. It has true single supply
100
1V
1V
20µ
s
100
10
5V
90
V OUT
10
0%
1
0V
(GND)
10
100
1k
10k
1V
FREQUENCY – Hz
Input Voltage Noise vs. Frequency
Gain of +2 Amplifier; V S = +5, 0, V IN = 2.5 V Sine Centered
at 1.25 Volts, R L = 100 k W
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
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AD822–SPECIFICATIONS (V S = 0, 5 volts @ T A = +25 8 C, V CM = 0 V, V OUT = 0.2 V unless otherwise noted)
AD822A
AD822B
AD822S 1
Parameter
Conditions
Min Typ Max Min Typ Max Min Typ Max Units
DC PERFORMANCE
Initial Offset
0.1
0.8
0.1
0.4
0.1
0.8
mV
Max Offset over Temperature
0.5
1.2
0.5
0.9
0.5
mV
Offset Drift
2
2
2
mV/°C
Input Bias Current
V CM = 0 V to 4 V
2
25
2
10
2
25
pA
at T MAX
0.5
5
0.5
2.5
0.5
nA
Input Offset Current
2
20
2
10
2
20
pA
at T MAX
0.5
0.5
1.5
nA
Open-Loop Gain
V O = 0.2 V to 4 V
R L = 100 k
500
1000
500
1000
500
1000
V/mV
T MIN to T MAX
400
400
V/mV
R L = 10 k
80
150
80
150
80
150
V/mV
T MIN to T MAX
80
80
V/mV
R L = 1 k
15
30
15
30
15
30
V/mV
T MIN to T MAX
10
10
V/mV
NOISE/HARMONIC PERFORMANCE
Input Voltage Noise
0.1 Hz to 10 Hz
2
2
2
mV p-p
f = 10 Hz
25
25
25
nV/ÖHz
f = 100 Hz
21
21
21
nV/ÖHz
f = 1 kHz
16
16
16
nV/ÖHz
f = 10 kHz
13
13
13
nV/ÖHz
Input Current Noise
0.1 Hz to 10 Hz
18
18
18
fA p-p
f = 1 kHz
0.8
0.8
0.8
fA/ÖHz
Harmonic Distortion
R L = 10 k to 2.5 V
f = 10 kHz
V O = 0.25 V to 4.75 V
–93
–93
–93
dB
DYNAMIC PERFORMANCE
Unity Gain Frequency
1.8
1.8
1.8
MHz
Full Power Response
V O p-p = 4.5 V
210
210
210
kHz
Slew Rate
3
3
3
V/ms
Settling Time
to 0.1%
V O = 0.2 V to 4.5 V
1.4
1.4
1.4
ms
to 0.01%
1.8
1.8
1.8
ms
MATCHING CHARACTERISTICS
Initial Offset
1.0
0.5
1.6
mV
Max Offset Over Temperature
1.6
1.3
mV
Offset Drift
3
3
mV/°C
Input Bias Current
20
10
20
pA
Crosstalk @ f = 1 kHz
R L = 5 kW
–130
–130
–130
dB
f = 100 kHz
–93
–93
–93
dB
INPUT CHARACTERISTICS
Common-Mode Voltage Range 2
–0.2
4
–0.2
4
–0.2
4
V
T MIN to T MAX
–0.2
4
–0.2
4
V
CMRR
V CM = 0 V to +2 V
66
80
69
80
66
80
dB
T MIN to T MAX
66
66
dB
Input Impedance
Differential
10 13
||0.5
10 13
||0.5
10 13
||0.5
W||pF
Common Mode
10 13
||2.8
10 13
||2.8
10 13
||2.8
W||pF
OUTPUT CHARACTERISTICS
Output Saturation Voltage 3
V OL –V EE
I SINK = 20 mA
5
7
5
7
5
7
mV
T MIN to T MAX
10
10
mV
V CC –V OH
I SOURCE = 20 mA
10
14
10
14
10
14
V
MIN to T MAX
20
20
mV
V OL –V EE
I SINK = 2 mA
40
55
40
55
40
55
mV
T MIN to T MAX
80
80
mV
V CC –V OH
I SOURCE = 2 mA
80
110
80
110
80
110
mV
T MIN to T MAX
160
160
mV
V OL –V EE
I SINK = 15 mA
300
500
300
500
300
500
mV
T MIN to T MAX
1000
1000
mV
V CC –V OH
I SOURCE = 15 mA
800
1500
800
1500
800
1500 mV
T MIN to T MAX
1900
1900
mV
Operating Output Current
15
15
15
mA
T MIN to T MAX
12
12
mA
Capacitive Load Drive
350
350
350
pF
POWER SUPPLY
Quiescent Current T MIN to T MAX
1.24 1.6
1.24 1.6
1.24
mA
Power Supply Rejection
V S + = 5 V to 15 V
70
80
66
80
70
80
dB
T MIN to T MAX
70
66
dB
–2–
REV. A
11023712.020.png 11023712.021.png
(V S =
6
5 volts @ T A = +25
8
C, V CM = 0 V, V OUT = 0 V unless otherwise noted)
AD822A
AD822
AD822B
AD822S 1
Parameter
Conditions
Min Typ Max Min Typ Max Min Typ Max Units
DC PERFORMANCE
Initial Offset
0.1
0.8
0.1
0.4
0.1
mV
Max Offset over Temperature
0.5
1.5
0.5
1
0.5
mV
Offset Drift
2
2
2
mV/°C
Input Bias Current
V CM = –5 V to 4 V
2
25
2
10
2
25
pA
at T MAX
0.5
5
0.5
2.5
0.5
nA
Input Offset Current
2
20
2
10
2
pA
at T MAX
0.5
0.5
1.5
nA
Open-Loop Gain
V O = –4 V to 4 V
R L = 100 k
400
1000
400
1000
400
1000
V/mV
T MIN to T MAX
400
400
V/mV
R L = 10 k
80
150
80
150
80
150
V/mV
T MIN to T MAX
80
80
V/mV
R L = 1 k
20
30
20
30
20
30
V/mV
T MIN to T MAX
10
10
V/mV
NOISE/HARMONIC PERFORMANCE
Input Voltage Noise
0.1 Hz to 10 Hz
2
2
2
mV p-p
f = 10 Hz
25
25
25
nV/ÖHz
f = 100 Hz
21
21
21
nV/ÖHz
f = 1 kHz
16
16
16
nV/ÖHz
f = 10 kHz
13
13
13
nV/ÖHz
Input Current Noise
0.1 Hz to 10 Hz
18
18
18
fA p-p
f = 1 kHz
0.8
0.8
0.8
fA/ÖHz
Harmonic Distortion
R L = 10 k
f = 10 kHz
V O = ± 4.5 V
–93
–93
–93
dB
DYNAMIC PERFORMANCE
Unity Gain Frequency
1.9
1.9
1.9
MHz
Full Power Response
V O p-p = 9 V
105
105
105
kHz
Slew Rate
3
3
3
V/ms
Settling Time
to 0.1%
V O = 0 V to ± 4.5 V
1.4
1.4
1.4
ms
to 0.01%
1.8
1.8
1.8
ms
MATCHING CHARACTERISTICS
Initial Offset
1.0
0.5
1.6
mV
Max Offset Over Temperature
3
2
2
mV
Offset Drift
3
3
mV/°C
Input Bias Current
25
10
25
pA
Crosstalk @ f = 1 kHz
R L = 5 kW
–130
–130
–130
dB
f = 100 kHz
–93
–93
–93
dB
INPUT CHARACTERISTICS
Common-Mode Voltage Range 2
–5.2
4
–5.2
4
–5.2
4
V
T MIN to T MAX
–5.2
4
–5.2
4
V
CMRR
V CM = –5 V to +2 V
66
80
69
80
66
80
dB
T MIN to T MAX
66
66
dB
Input Impedance
Differential
10 13
||0.5
10 13
||0.5
10 13
||0.5
W||pF
Common Mode
10 13
||2.8
10 13
||2.8
10 13
||2.8
W||pF
OUTPUT CHARACTERISTICS
Output Saturation Voltage 3
V OL –V EE
I SINK = 20 mA
5
7
5
7
5
7
mV
T MIN to T MAX
10
10
mV
V CC –V OH
I SOURCE = 20 mA
10
14
10
14
10
14
V
MIN to T MAX
20
20
mV
V OL –V EE
I SINK = 2 mA
40
55
40
55
40
55
mV
T MIN to T MAX
80
80
mV
V CC –V OH
I SOURCE = 2 mA
80
110
80
110
80
110
mV
T MIN to T MAX
160
160
mV
V OL –V EE
I SINK = 15 mA
300
500
300
500
300
500
mV
T MIN to T MAX
1000
1000
mV
V CC –V OH
I SOURCE = 15 mA
800
1500
800
1500
800
1500 mV
T MIN to T MAX
1900
1900
mV
Operating Output Current
15
15
15
mA
T MIN to T MAX
12
12
mA
Capacitive Load Drive
350
350
350
pF
POWER SUPPLY
Quiescent Current T MIN to T MAX
1.3
1.6
1.3
1.6
1.3
mA
Power Supply Rejection
V S + = 5 V to 15 V
70
80
66
80
70
80
dB
T MIN to T MAX
70
66
dB
REV. A
–3–
11023712.022.png 11023712.023.png
AD822–SPECIFICATIONS (V S = 6 15 volts @ T A = +25 8 C, V CM = 0 V, V OUT = 0 V unless otherwise noted)
AD822A
AD822B
AD822S 1
Parameter
Conditions
Min Typ Max Min Typ Max Min Typ Max Units
DC PERFORMANCE
Initial Offset
0.4
2
0.3
1.5
0.4
2.0
mV
Max Offset over Temperature
0.5
3
0.5
2.5
0.5
mV
Offset Drift
2
2
2
mV/°C
Input Bias Current
V CM = 0 V
2
25
2
12
2
25
pA
V CM = –10 V
40
40
40
pA
at T MAX
V CM = 0 V
0.5
5
0.5
2.5
0.5
nA
Input Offset Current
2
20
2
12
2
20
pA
at T MAX
0.5
0.5
1.5
nA
Open-Loop Gain
V O = +10 V to –10 V
R L = 100 k
500
2000
500
2000
500
2000
V/mV
T MIN to T MAX
500
500
V/mV
R L = 10 k
100
500
100
500
150
400
V/mV
T MIN to T MAX
100
100
V/mV
R L = 1 k
30
45
30
45
30
45
V/mV
T MIN to T MAX
20
20
V/mV
NOISE/HARMONIC PERFORMANCE
Input Voltage Noise
0.1 Hz to 10 Hz
2
2
2
mV p-p
f = 10 Hz
25
25
25
nV/ÖHz
f = 100 Hz
21
21
21
nV/ÖHz
f = 1 kHz
16
16
16
nV/ÖHz
f = 10 kHz
13
13
13
nV/ÖHz
Input Current Noise
0.1 Hz to 10 Hz
18
18
18
fA p-p
f = 1 kHz
0.8
0.8
0.8
fA/ÖHz
Harmonic Distortion
R L = 10 k
f = 10 kHz
V O = ± 10 V
–85
–85
–85
dB
DYNAMIC PERFORMANCE
Unity Gain Frequency
1.9
1.9
1.9
MHz
Full Power Response
V O p-p = 20 V
45
45
45
kHz
Slew Rate
3
3
3
V/ms
Settling Time
to 0.1%
V O = 0 V to ± 10 V
4.1
4.1
4.1
ms
to 0.01%
4.5
4.5
4.5
ms
MATCHING CHARACTERISTICS
Initial Offset
3
2
0.8
mV
Max Offset Over Temperature
4
2.5
1.0
mV
Offset Drift
3
3
mV/°C
Input Bias Current
25
12
25
pA
Crosstalk @ f = 1 kHz
R L = 5 kW
–130
–130
–130
dB
f = 100 kHz
–93
–93
–93
dB
INPUT CHARACTERISTICS
Common-Mode Voltage Range 2
–15.2
14
–15.2
14
–15.2
14
V
T MIN to T MAX
–15.2
14
–15.2
14
V
CMRR
V CM = –15 V to 12 V
70
80
74
90
70
90
dB
T MIN to T MAX
70
74
dB
Input Impedance
Differential
10 13
||0.5
10 13
||0.5
10 13
||0.5
W||pF
Common Mode
10 13
||2.8
10 13
||2.8
10 13
||2.8
W||pF
OUTPUT CHARACTERISTICS
Output Saturation Voltage 3
V OL –V EE
I SINK = 20 mA
5
7
5
7
5
7
mV
T MIN to T MAX
10
10
mV
V CC –V OH
I SOURCE = 20 mA
10
14
10
14
10
14
V
MIN to T MAX
20
20
mV
V OL –V EE
I SINK = 2 mA
40
55
40
55
40
55
mV
T MIN to T MAX
80
80
mV
V CC –V OH
I SOURCE = 2 mA
80
110
80
110
80
110
mV
T MIN to T MAX
160
160
mV
V OL –V EE
I SINK = 15 mA
300
500
300
500
300
500
mV
T MIN to T MAX
1000
1000
mV
V CC –V OH
I SOURCE = 15 mA
800
1500
800
1500
800
1500 mV
T MIN to T MAX
1900
1900
mV
Operating Output Current
20
20
20
mA
T MIN to T MAX
15
15
mA
Capacitive Load Drive
350
350
350
pF
POWER SUPPLY
Quiescent Current T MIN to T MAX
1.4
1.8
1.4
1.8
1.4
mA
Power Supply Rejection
V S + = 5 V to 15 V
70
80
70
80
70
80
dB
T MIN to T MAX
70
70
dB
–4–
REV. A
11023712.024.png 11023712.025.png
(V S = 0, 3 volts @ T A = +25
8
C, V CM = 0 V, V OUT = 0.2 V unless otherwise noted)
AD822
AD822A-3 V
Parameter
Conditions
Min
Typ
Max
Units
DC PERFORMANCE
Initial Offset
0.2
1
mV
Max Offset over Temperature
0.5
1.5
mV
Offset Drift
1
mV/°C
Input Bias Current
V CM = 0 V to +2 V
2
25
pA
at T MAX
0.5
5
nA
Input Offset Current
2
20
pA
at T MAX
0.5
nA
Open-Loop Gain
V O = 0.2 V to 2 V
R L = 100 k
300
1000
V/mV
T MIN to T MAX
300
V/mV
R L = 10 k
60
150
V/mV
T MIN to T MAX
60
V/mV
R L = 1 k
10
30
V/mV
T MIN to T MAX
8
V/mV
NOISE/HARMONIC PERFORMANCE
Input Voltage Noise
0.1 Hz to 10 Hz
2
mV p-p
f = 10 Hz
25
nV/ÖHz
f = 100 Hz
21
nV/ÖHz
f = 1 kHz
16
nV/ÖHz
f = 10 kHz
13
nV/ÖHz
Input Current Noise
0.1 Hz to 10 Hz
18
fA p-p
f = 1 kHz
0.8
fA/ÖHz
Harmonic Distortion
R L = 10 k to 1.5 V
f = 10 kHz
V O = ± 1.25 V
–92
dB
DYNAMIC PERFORMANCE
Unity Gain Frequency
1.5
MHz
Full Power Response
V O p-p = 2.5 V
240
kHz
Slew Rate
3
V/ms
Settling Time
to 0.1%
V O = 0.2 V to 2.5 V
1
ms
to 0.01%
1.4
ms
MATCHING CHARACTERISTICS
Initial Offset
1
mV
Max Offset Over Temperature
2
mV
Offset Drift
2
mV/°C
Input Bias Current
10
pA
Crosstalk @ f = 1 kHz
R L = 5 kW
–130
dB
f = 100 kHz
–93
dB
INPUT CHARACTERISTICS
Common-Mode Voltage Range 2
–0.2
2
V
T MIN to T MAX
–0.2
2
V
CMRR
V CM = 0 V to +1 V
60
74
dB
T MIN to T MAX
60
dB
Input Impedance
Differential
10 13
||0.5
W||pF
Common Mode
10 13
||2.8
W||pF
OUTPUT CHARACTERISTICS
Output Saturation Voltage 3
V OL –V EE
I SINK = 20 mA
5
7
mV
T MIN to T MAX
10
mV
V CC –V OH
I SOURCE = 20 mA
10
14
mV
T MIN to T MAX
20
mV
V OL –V EE
I SINK = 2 mA
40
55
mV
T MIN to T MAX
80
mV
V CC –V OH
I SOURCE = 2 mA
80
110
mV
T MIN to T MAX
160
mV
V OL –V EE
I SINK = 10 mA
200
400
mV
T MIN to T MAX
400
mV
V CC –V OH
I SOURCE = 10 mA
500
1000
mV
T MIN to T MAX
1000
mV
Operating Output Current
15
mA
T MIN to T MAX
12
mA
Capacitive Load Drive
350
pF
POWER SUPPLY
Quiescent Current T MIN to T MAX
1.24
1.6
mA
Power Supply Rejection
V S + = 3 V to 15 V
70
80
dB
T MIN to T MAX
70
dB
REV. A
–5–
11023712.026.png 11023712.027.png

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