AD8639WARZ 精密放大器

AD8639WARZ

精密放大器 16V Dual Auto-Zero RRO Precision

16 V Auto-Zero, Rail-to-Rail Output  Operational Amplifiers

GENERAL DESCRIPTION AD8639WARZ

The AD8638/AD8639 are single and dual wide bandwidth, auto-zero amplifiers featuring rail-to-rail output swing and low noise. These amplifiers have very low offset, drift, and bias current. Operation is fully specified from 5 V to 16 V single supply (±2.5 V to ±8 V dual supply).

The AD8638/AD8639 provide benefits previously found only  in expensive zero-drift or chopper-stabilized amplifiers. Using  the Analog Devices, Inc., topology, these auto-zero amplifiers  combine low cost with high accuracy and low noise. No external  capacitors are required. In addition, the AD8638/AD8639  greatly reduce the digital switching noise found in most chopperstabilized  amplifiers.

FEATURES AD8639WARZ

Low offset voltage: 9 μV maximum

Offset drift: 0.04 μV/°C maximum

Rail-to-rail output swing

5 V to 16 V single-supply or ±2.5 V to ±8 V dual-supply

operation

High gain: 136 dB typical

High CMRR: 133 dB typical

High PSRR: 143 dB typical

Very low input bias current: 40 pA maximum

Low supply current: 1.3 mA maximum

AD8639: qualified for automotive applications

APPLICATIONS AD8639WARZ

Pressure and position sensors

Strain gage amplifiers

Medical instrumentation

Thermocouple amplifiers

Automotive sensors

Precision references

Precision current sensing