GENERAL DESCRIPTION

The AD627 is an integrated, micropower instrumentation amplifier that delivers rail-to-rail output swing on single and dual (+2.2 V to ±18 V) supplies. The AD627 provides excellent ac and dc specifications while operating at only 85 μA maximum.

FEATURES

Micropower, 85 μA maximum supply current

Wide power supply range (+2.2 V to ±18 V)

Easy to use

Gain set with one external resistor

Gain range 5 (no resistor) to 1000

Higher performance than discrete designs

Rail-to-rail output swing

High accuracy dc performance

0.03 typical gain accuracy (G = +5) (AD627A)

10 ppm/°C typical gain drift (G = +5)

125 μV maximum input offset voltage (AD627B dual supply)

200 μV maximum input offset voltage (AD627A dual supply)

1 μV/°C maximum input offset voltage drift (AD627B)

3 μV/°C maximum input offset voltage drift (AD627A)

10 nA maximum input bias current

Noise: 38 nV/√Hz RTI noise @ 1 kHz (G = +100)

Excellent ac specifications

AD627A: 77 dB minimum CMRR (G = +5)

AD627B: 83 dB minimum CMRR (G = +5)

80 kHz bandwidth (G = +5)

135 μs settling time to 0.01 (G = +5, 5 V step)

APPLICATIONS

4 to 20 mA loop-powered applications

Low power medical instrumentation—ECG, EEG

Transducer interfacing

Thermocouple amplifiers

Industrial process controls

Low power data acquisition

Portable battery-powered instruments