AD8500:  Micropower Precision CMOS Operational Amplifier

The AD8500 is a low power, precision CMOS op amp featuring a maximum supply current of 1 μA. The AD8500 has a maximum offset voltage of 1 mV and a typical input bias current of 1 pA, and it operates ...More

AD8500:  Micropower Precision CMOS Operational Amplifier

Product Description

The AD8500 is a low power, precision CMOS op amp featuring a maximum supply current of 1 μA. The AD8500 has a maximum offset voltage of 1 mV and a typical input bias current of 1 pA, and it operates rail-to-rail on both the input and output. The AD8500 can operate from a single-supply voltage of +1.8 V to +5.5 V or a dual-supply voltage of ±0.9 V to ±2.75 V.

With its low power consumption, low input bias current, and rail-to-rail input and output, the AD8500 is ideally suited for a variety of battery-powered portable applications. Potential applications include ECGs, pulse monitors, glucose meters, smoke and fire detectors, vibration monitors, and backup battery sensors.

The ability to swing rail-to-rail at both the input and output helps maximize dynamic range and signal-to-noise ratio in systems that operate at very low voltages. The low offset voltage allows the AD8500 to be used in systems with high gain without having excessively large output offset errors, and it provides high accuracy without the need for system calibration.

The AD8500 is fully specified over the industrial temperature range (−40°C to +85°C) and is operational over the extended industrial temperature range (−40°C to +125°C). It is available in a 5-lead, SC70 surface-mount package.


Applications
  • Portable Equipment
  • Remote Sensors
  • Low Power Filters
  • Threshold Detectors
  • Current Sensing

    • Features

    • Supply Current: 1 μA Maximum
    • Offset Voltage: 1 mV Maximum
    • Single-supply or Dual-supply Operation
    • Rail-to-rail Input and Output
    • No Phase Reversal
    • Unity Gain Stable

    Diagrams

    AD8500 Diagram
    Pin Configuration Diagram for AD8500

    Specifications

    -3dB Bandwidth 7kHz
    Slew Rate 0.0040V/µs
    Vos 235µV
    Ib 1pA
    Input Noise (nV/rtHz) 190nV/rtHz
    Vcc-Vee Supply (V) 1.8 to 5.5
    Iq per Amplifier (max) 1µA
    # OpAmps per Pkg 1
    Operating Temp Range -40 to +125
    Packages SC70

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    Part# Small Signal Bandwidth Slew Rate Vos Ib V Noise Density Amplifiers Per Package Widest Temp Range (°C)
    AD8500 7KHz 4mV/µs 235µV 1pA 190nV/rtHz 1 -40 to +125
    AD8603 400KHz 100mV/µs 12µV 200fA 22nV/rtHz 1 -40 to +125
    AD8663 540KHz 300mV/µs 30µV 300fA 21nV/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
    AD8605 10MHz 5V/µs 20µV 200fA 6.5nV/rtHz 1 -40 to +125
    AD8615 23MHz 12V/µs 80µV 200fA 7nV/rtHz 1 -40 to +125
    AD8651 50MHz