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Single-Supply, Rail-to-Rail,
Low Power, FET-Input Op Amp
AD822
Data Sheet
FEATURES
CONNECTION DIAGRAM
True single-supply operation
Output swings rail-to-rail
Input voltage range extends below ground
Single-supply capability from 5 V to 30 V
Dual-supply capability from ±2.5 V to ±15 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 μA maximum quiescent current per amplifier
Unity-gain bandwidth: 1.8 MHz
Slew rate of 3 V/μs
Good dc performance
800 μV maximum input offset voltage
2 μV/°C typical offset voltage drift
25 pA maximum input bias current
Low noise
13 nV/√Hz at 10 kHz
No phase inversion
8 V+
OUT1 1
–IN1 2
7 OUT2
+IN1 3
6 –IN2
V– 4
AD822
5 +IN2
00874-001
Product
Overview
Figure 1. 8-Lead PDIP (N Suffix);
8-Lead MSOP (RM Suffix);
and 8-Lead SOIC_N (R Suffix)
APPLICATIONS
Battery-powered precision instrumentation
Photodiode preamps
Active filters
12-bit to 14-bit data acquisition systems
Medical instrumentation
Low power references and regulators
GENERAL DESCRIPTION
Rev. J
10
1
10
100
1k
FREQUENCY (Hz)
10k
00874-002
Offset voltage of 800 μV maximum, offset voltage drift of 2 μV/°C,
input bias currents below 25 pA, and low input voltage noise
provide dc precision with source impedances up to a gigaohm.
The 1.8 MHz unity-gain bandwidth, –93 dB total harmonic
distortion (THD) at 10 kHz, and 3 V/μs slew rate are provided
with a low supply current of 800 μA per amplifier.
100
INPUT VOLTAGE NOISE (nV/√Hz)
The AD822 is a dual precision, low power FET input op amp
that can operate from a single supply of 5 V to 30 V or from
dual supplies of ±2.5 V to ±15 V. It has true single-supply capability
with an input voltage range extending below the negative rail,
allowing the AD822 to accommodate input signals below ground
while in the single-supply mode. Output voltage swing extends
to within 10 mV of each rail, providing the maximum output
dynamic range.
Figure 2. Input Voltage Noise vs. Frequency
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