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GENERAL DESCRIPTION

The ADA4691-2/ADA4692-2 are dual and the ADA4691-4/ ADA4692-4 are the quad rail-to-rail output, single-supply amplifiers featuring low power, wide bandwidth, and low noise. The ADA4691-2 has two independent shutdown pins, allowing further reduction in supply current. The ADA4691-4 is a quad with dual shutdown pins each controlling a pair of amplifiers and is available in the 16-lead LFCSP. The ADA4692-4 is a quad version without shutdown.

FEATURES

Low power: 180 μA typical

Very low input bias currents: 0.5 pA typical

Low noise: 16 nV/√Hz typical

3.6 MHz bandwidth

Offset voltage: 500 μV typical

Low offset voltage drift: 4 μV/°C maximum

Low distortion: 0.003 THD + N

2.7 V to 5 V single supply or ±1.35 V to ±2.5 V dual supply

Available in very small 2 mm × 2 mm LFCSP packages

APPLICATIONS

Photodiode amplifiers

Sensor amplifiers

Portable medical and instrumentation

Portable audio: MP3s, PDAs, and smartphones

Communications

Low-side current sense

ADC drivers

Active filters

Sample-and-hold