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AD8212:  High Voltage Current Shunt Monitor

Product Status:Recommended for New Designs
Data
Sheet
AD8212 Data Sheet Rev B, 05/2009 (pdf 381kB)

Product Details

Product Status:Recommended for New Designs
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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

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    FEATURES and BENEFITS

    • 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

    Functional Block Diagram for AD8212

    AD8212 Diagram
    Typical Applications and Other Diagrams

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    Documentation

    Title Content Type File Type
    AD8212: High Voltage Current Shunt Monitor Data Sheet (Rev B, 05/2009) (pdf, 381 kB) Data Sheets PDF
    AN-669: Effectively Applying the AD628 Precision Gain Block  (pdf, 193 kB) Application Notes PDF
    CN-0218: 500 V Common-Mode Voltage Current Monitor  (pdf, 161 kB) Circuit Note PDF
    A Designer's Guide to Instrumentation Amplifiers (3rd Edition) Design Handbooks HTML
    Auto-Zero Amplifiers  (doc, 75 kB)
    A wide variety of electronic applications, especially those involving very small input signals, require signal paths with very low offset voltage and offset voltage drift over time and temperature.     		Technical Articles DOC
    High-performance Adder Uses Instrumentation Amplifiers
    Make an adder circuit using instrumentation amplifiers to increase input impedance.
    (EDN, 9/3/2009)     		Technical Articles HTML
    Power System Management (Spring 2007)  (pdf, 1170 kB) Overview PDF
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

    Evaluation Kits & Symbols & Footprints

    Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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    Updated 11/2011
    Circuit Note PDF

    CN0218:500 V Common-Mode Voltage Current Monitor

    Benefits & Features
    • 0 to 500 V common mode voltage
    • Single supply voltage
    • Galvanic isolation protects processor
    • Creates isolated supply for digital control
    Products Used

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    HARDWARE BLOCK DIAGRAM

    Available Design Resources

    CN0218:500 V Common-Mode Voltage Current Monitor

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    Price, packaging, availability

    AD8212 Model Options
    Model Package Pins Temp.
    Range         		Packing,
    Qty         		Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    AD8212WYRMZ Status: Production 8 ld MSOP 8 Auto Tube, 50 $1.84 $1.78 Y  Material Info Notify Me Purchase
    AD8212WYRMZ-R7 Status: Production 8 ld MSOP 8 Auto Reel, 1000 $1.84 $1.78 Y  Material Info Notify Me Purchase
    AD8212WYRMZ-RL Status: Production 8 ld MSOP 8 Auto Reel, 3000 $1.84 $1.78 Y  Material Info Notify Me Purchase
    AD8212YRMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $1.60 $1.32 Y  Material Info Notify Me Purchase Sample
    AD8212YRMZ-R7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 $1.60 $1.32 Y  Material Info Notify Me Purchase
    AD8212YRMZ-RL Status: Production 8 ld MSOP 8 Ind Reel, 3000 $1.60 $1.32 Y  Material Info Notify Me Purchase
    Price Table Help

    The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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