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GENERAL DESCRIPTION

The AD8276/AD8277 are general-purpose, unity-gain difference amplifiers intended for precision signal conditioning in power critical applications that require both high performance and low power. They provide exceptional common-mode rejection ratio (86 dB) and high bandwidth while amplifying signals well beyond the supply rails. The on-chip resistors are laser-trimmed for excellent gain accuracy and high CMRR. They also have extremely low gain drift vs. temperature.

The common-mode range of the amplifiers extends to almost double the supply voltage, making these amplifiers ideal for single supply applications that require a high common-mode voltage range. The internal resistors and ESD circuitry at the inputs also provide overvoltage protection to the op amps.

FEATURES

Wide input range beyond supplies

Rugged input overvoltage protection

Low supply current: 200 μA maximum per channel

Low power dissipation: 0.5 mW at VS = 2.5 V

Bandwidth: 550 kHz

CMRR: 86 dB minimum, dc to 10 kHz

Low offset voltage drift: ±2 μV/°C maximum (B Grade)

Low gain drift: 1 ppm/°C maximum (B Grade)

Enhanced slew rate: 1.1 V/μs

Wide power supply range:

Single supply: 2 V to 36 V

Dual supplies: ±2 V to ±18 V

APPLICATIONS

Voltage measurement and monitoring

Current measurement and monitoring

Differential output instrumentation amplifier

Portable, battery-powered equipment

Test and measurement