AD8212:  High Voltage Current Shunt Monitor

The AD8212 is a high common-mode voltage, current shunt monitor. It accurately amplifies a small differential input voltage in the presence of large common-mode voltages up to 65 V (>500 V with an ...More

AD8212:  High Voltage Current Shunt Monitor

Product Description

The AD8212 is a high common-mode voltage, current shunt monitor. It accurately amplifies a small differential input voltage in the presence of large common-mode voltages up to 65 V (>500 V with an external PNP transistor).

The AD8212 is ideal for current monitoring across a shunt resistor in applications controlling loads, such as motors and solenoids. The current output of the device is proportional to the input differential voltage. The user can select an external resistor to set the desired gain. The typical common-mode voltage range of the AD8212 is 7 V to 65 V.

Another feature of the AD8212 is high voltage operation, which is achieved by using an external high voltage breakdown PNP transistor. In this configuration, the common-mode range of the AD8212 is equal to the breakdown of the external PNP transistor. Therefore, operation at several hundred volts is easily achieved (see Figure 23 in the data sheet).

The AD8212 features a patented output base current compensation circuit for high voltage operation mode. This ensures that no base current is lost through the external transistor and excellent output accuracy is maintained regardless of common-mode voltage or temperature.

Applications

  • Current shunt measurement
  • Motor controls
  • DC-to-DC converters
  • Power supplies
  • Battery monitoring
  • Remote sensing

    • Data Sheet, Rev. A, 11/07

    Features

    • Adjustable gain
    • High common-mode voltage range
      7 V to 65 V typical
      7 V to >500 V with external pass transistor
    • Current output
    • Integrated 5 V series regulator
    • 8-lead MSOP package
    • Operating temperature range of −40°C to +125°C

    Diagrams

    AD8212 Diagram
    Functional Block Diagram for AD8212

    技术指标

    Single/Dual Supply Single
    Voltage Supply (Vmax) +65V
    Gain Setting Method Resistor
    Gain Range (min to max) 1000
    Bandwidth G=10 (kHz typ) 1000kHz
    CMRR (dB) 100dB
    Vnoise RTI 1-10 Hz µVp-p 1.1µV p-p
    Temperature Range -40 to +125
    Supply Current (max) 720µA
    Package MSOP

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    订阅新产品资料
    Part# Common Mode Range (V) Bandwidth G=10 (kHz typ) CMRR (dB) Gain Range (min to max) Voltage Supply (Vmin) Voltage Supply (Vmax) Supply Current (max) VosiTC (µV/deg C) Gain temp co. Temperature Range Package Price* (1000-4999)
    AD22057 -1 to 24 30 80 20 +3 +26 0.5mA - - -40 to +125 DIP, SOIC $4.62
    AD626 0 to 54 100 66 90 ±2.4 ±6 2mA 0.000006 150ppm/C -40 to +85 DIP, SOIC $3.70
    AD628 +/- 100 600 77 100 ±5 ±18 1.6mA - - -40 to +85 SOIC $1.78
    AD629 +/- 270 500 77 1 ±2.5 ±18 1mA - - -40 to +85 DIP, SOIC $2.84
    AD8202 -12 to 30 50 82 20 +3.5 +12 0.25mA 10 20ppm/C -40 to +125 Die, SOIC, SOP $1.51
    AD8203 -12 to 30 60 82 14 +3.5 +12 0.25mA 10 20ppm/C -40 to +125 SOP $1.37
    AD8205 -2 to 65 50 78 50 +4.5 +5 2mA 15 30ppm/C -40 to +125 Die, SOIC $1.51
    AD8206 -2 to 65 100 76 20 +4.5 +5.5 2mA 15 30ppm/C -40 to +125 Die, SOIC $1.37
    AD8210 -2 to 65 500 100 20 +4.5 +5.5 1.5mA 10 20ppm/C -40 to +125 SOIC $1.81
    AD8211 -2 to 65 500 120 20 - - 2mA 12 20ppm/C -40 to +125 SOT $0.81
    AD8212 7 to 65 1000 100 1,000 +7 +65 720µA 10 - -40 to +125 MSOP $0.93
    AD8213 -2 to 65 500 100 20 +4.5 +5.5 2.5mA 12 10ppm/C -40 to +125 MSOP $2.01
    AD8214 5 to 65 - 80 100 +5 +65 1.2mA 15 - -40 to +125 MSOP $0.76
    AD8215