GENERAL DESCRIPTION

The AD8555 is a zero-drift, sensor signal amplifier with digitally programmable gain and output offset. Designed to easily and accurately convert variable pressure sensor and strain bridge outputs to a well-defined output voltage range, the AD8555 also accurately amplifies many other differential or single-ended sensor outputs. The AD8555 uses the ADI patented low noise auto-zero and DigiTrim® technologies to create an incredibly accurate and flexible signal processing solution in a very compact footprint.

FEATURES

Very low offset voltage: 10 µV maximum over temperature

Very low input offset voltage drift: 60 nV/°C maximum

High CMRR: 96 dB minimum

Digitally programmable gain and output offset voltage

Single-wire serial interface

Open and short wire fault detection

Low-pass filtering

Stable with any capacitive load

Externally programmable output clamp voltage for driving

low voltage ADCs

LFCSP-16 and SOIC-8 packages

2.7 V to 5.5 V operation

−40°C to +125°C operation

APPLICATIONS

Pressure and position sensors

Thermocouple amplifiers

Industrial weigh scales

Precision current sensing

Strain gages