GENERAL DESCRIPTION

The AD8476 is a very low power, fully differential precision amplifier with integrated gain resistors for unity gain. It is an ideal choice for driving low power, high performance ADCs as a single-ended-to-differential or differential-to-differential amplifier. It provides a precision gain of 1, common-mode level shifting, low temperature drift, and rail-to-rail outputs for maximum dynamic range.

FEATURES

Very low power

330 μA supply current

Extremely low harmonic distortion

−126 HD2 at 10 kHz

−128 HD3 at 10 kHz

Fully differential or single-ended inputs/outputs

Differential output designed to drive precision ADCs

Drives switched capacitor and Σ-Δ ADCs

Rail-to-rail outputs

VOCM pin adjusts output common mode

Robust overvoltage up to 18 V beyond supplies

High performance

Suitable for driving 16-bit converter up to 250 kSPS

39 nV/√Hz output noise

1 ppm/°C gain drift maximum

200 μV maximum output offset

10 V/μs slew rate

6 MHz bandwidth

Single supply: 3 V to 18 V

Dual supplies: ±1.5 V to ±9 V

APPLICATIONS

ADC driver

Differential instrumentation amplifier building block

Single-ended-to-differential converter

Battery-powered instruments