AD8211:  High Voltage Current Shunt Monitor

The AD8211 is a high voltage, precision current shunt amplifier. It features a set gain of 20 V/V, with a typical ±0.5% gain error over the entire temperature range. The buffered output voltage ...More

AD8211:  High Voltage Current Shunt Monitor

Product Description

The AD8211 is a high voltage, precision current shunt amplifier. It features a set gain of 20 V/V, with a typical ±0.5% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. Excellent common-mode rejection from −2 V to +65 V is independent of the 5 V supply. The AD8211 performs unidirectional current measurements across a shunt resistor in a variety of industrial and automotive applications, such as motor control, solenoid control, or battery management.

Special circuitry is devoted to output linearity being maintained throughout the input differential voltage range of 0 mV to 250 mV, regardless of the common-mode voltage present. The AD8211 has an operating temperature range of −40°C to +125°C and is offered in a small 5-lead SOT package.

Applications

  • High-side current sensing
    • Motor controls
    Transmission controls
    Engine management
    Suspension controls
    Vehicle dynamic controls
    DC-to-dc converters

    Data Sheet, Rev. 0, 7/07

    Features

    • ±4000 V HBM ESD
    • High common-mode voltage range
      −2 V to +65 V operating
      −3 V to +68 V survival
    • Wide operating temperature range
      5-lead SOT: −40°C to +125°C
    • Buffered output voltage
    • Excellent ac and dc performance
      5 μV/°C typical offset drift
      −13 ppm/°C typical gain drift
      120 dB typical CMRR at dc

    Diagrams

    AD8211 Diagram
    Functional Block Diagram for AD8211

    Specifications

    Single/Dual Supply Single
    Gain Setting Method fixed
    Gain Range (min to max) 20
    Bandwidth G=10 (kHz typ) 500kHz
    CMRR (dB) 120dB
    Vnoise RTI 1-10 Hz µVp-p 7µµV p-p
    Temperature Range -40 to +125
    Supply Current (max) 2mA
    Package SOT

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