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AD8212:  High Voltage Current Shunt Monitor

Product Details

Product Status:Recommended for New Designs

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.


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


  • 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

MSOP Breakout Board

The MSOP breakout board is not an Analog Devices board. This board is helpful in evaluating the AD8212 as part of a breadboard or vector setup.

This board is available for purchase at Digikey. The Digikey part number is 33108CA-ND.


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
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Price, packaging, availability

AD8212 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD8212WYRMZ Status: Production 8 ld MSOP 8 Auto Tube, 50 $1.84 $1.78 Y  Material Info Notify Me Purchase Sample
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 PDN 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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