AD8571:  Single, Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier

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 ...More

AD8571:  Single, Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier

Product 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.

With an offset voltage of only 1 μV and drift of 0.005 μV/°C, the AD857x family is perfectly suited for applications where error sources cannot be tolerated. Position and pressure sensors, medical equipment, and strain gage amplifiers benefit greatly from nearly zero drift over their operating temperature range. Many more systems require the rail-to-rail input and output swings provided by the AD857x family.

Applications

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

    • Data Sheet, Rev. D, 6/08

    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
    • See Data Sheet for Additional Information

    Diagrams

    • Enlarge
    • Symbols and Footprints
    AD8571 Diagram
    Pin Configuration Diagram for AD8571

    Specifications

    -3dB Bandwidth 1.5MHz
    Slew Rate 400mV/µs
    Vos 1µV
    Ib 10pA
    Input Noise (nV/rtHz) 51nV/rtHz
    Vcc-Vee Supply (V) 2.7 to 6
    Iq per Amplifier (max) 975µA
    # OpAmps per Pkg 1
    Operating Temp Range -40 to +125
    Packages SOIC,SOP

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    Part# Small Signal Bandwidth Slew Rate Vos Ib V Noise Density Amplifiers Per Package Widest Temp Range (°C)
    AD8551 1.5MHz 400mV/µs 1µV 10pA 42nV/rtHz 1 -40 to +125
    AD8571 1.5MHz 400mV/µs 1µV 10pA 51nV/rtHz 1 -40 to +125
    AD8572 1.5MHz 400mV/µs 1µV 10pA 51nV/rtHz 2 -40 to +125
    AD8552 1.5MHz 400mV/µs 1µV 10pA 42nV/rtHz 2 -40 to +125
    AD8628 2.5MHz 1V/µs 1µV 30pA 22nV/rtHz 1 -40 to +125
    AD8641 3.5MHz 3V/µs 50µV 250fA 27.5nV/rtHz 1 -40 to +125
    AD8661 4MHz 3.5V/µs 30µV 300fA 12nV/rtHz 1 -40 to +125