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