GENERAL DESCRIPTION
This family of amplifiers has ultralow offset, drift, and bias current. The AD8571, AD8572, and AD8574 are single, dual, and quad amplifiers, respectively, featuring rail-to-rail input and output swings. All are guaranteed to operate from 2.7 V to 5 V single supply.
The AD857x family provides benefits previously found only in expensive auto-zeroing or chopper-stabilized amplifiers. Using Analog Devices, Inc., topology, these zero-drift amplifiers combine low cost with high accuracy. (No external capacitors are required.) Using a patented spread-spectrum, auto-zero technique, the AD857x family eliminates the intermodulation effects from interaction of the chopping function with the signal frequency in ac applications.

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
  
APPLICATIONS
   Temperature sensors
   Pressure sensors
   Precision current sensing
   Strain gage amplifiers
   Medical instrumentation
   Thermocouple amplifiers