AD8574ARUZ Description

The bias current, drift, and offset of this family of amplifiers are extremely low. Rail-to-rail input and output swings are a feature of the single, dual, and quad amplifiers designated AD8571, AD8572, and AD85741, respectively. All are guaranteed to function with a single supply between 2.7 V and 5 V.

The AD8571, AD8572, and AD8574 offer advantages that were previously only available in pricey auto-zeroing or chopper-stabilized amplifiers. These zerodrift amplifiers combine low cost and great accuracy using Analog Devices, Inc.'s architecture. (External capacitors are not necessary.) The AD8571/AD8572/AD8574 reduce the intermodulation effects caused by interaction of the chopping function with the signal frequency in ac applications by using a spread-spectrum, auto-zero approach.

AD8574ARUZ Features

• Low offset voltage: 1 μV

• Input offset drift: 0.005 μV/°C

• Rail-to-rail input and output swing

• 5 V/2.7 V single-supply operation

• High gain: 145 dB typical

• CMRR: 140 dB typical

• PSRR: 130 dB typical

• Ultralow input bias current: 10 pA typical

• Low supply current: 750 μA per op amp

• Overload recovery time: 50 μs

• No external capacitors required 

AD8574ARUZ Applications

• Temperature sensors

• Pressure sensors

• Precision current sensing

• Strain gage amplifiers

• Medical instrumentation

• Thermocouple amplifiers