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GENERAL 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 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.

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 ±1.5 V to ±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 μA maximum quiescent current per amplifier

Unity gain bandwidth: 1.8 MHz

Slew rate of 3.0 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 @ 10 kHz

No phase inversion

APPLICATIONS

Battery-powered precision instrumentation

Photodiode preamps

Active filters

12-bit to 14-bit data acquisition systems

Medical instrumentation

Low power references and regulators