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AD8207:  Zero Drift, High Voltage, Bidirectional Difference Amplifier

Product Details

Product Status:Recommended for New Designs

The AD8207 is a single-supply difference amplifier ideal for amplifying small differential voltages in the presence of large common-mode voltage. The operating input common-mode voltage range extends from −4 V to +65 V with a 5 V supply. The AD8207 works with a single-supply voltage of 3.3 V to 5 V, and is ideally suited to withstand large input PWM common-mode voltages, typical in solenoid and motor control applications.

The AD8207 is available in an 8-lead SOIC package. Excellent dc performance over temperature keeps errors in the mea-surement loop to a minimum. Offset drift is typically less than 500 nV/°C, and gain drift is typically below 10 ppm/°C.

The AD8207 is ideal for bidirectional current sensing applications. It features two reference pins,VREF1 and VREF2, that allow the user to easily offset the output of the device to any voltage within the supply range. With VREF1 attached to the V+ pin and VREF2 attached to the GND pin, the output is set at half scale. Attaching both pins to GND causes the output to be unipolar, starting near ground. Attaching both pins to V+ causes the output to be unipolar starting near V+. Other output offsets are achieved by applying an external low impedance voltage to the VREF1 and VREF2 pins.


Applications
  • High-side current sensing in
    Motor control
    Solenoid control
    Diesel-injection control
    Engine management
    Suspension control
    Vehicle dynamic control
    DC-to-dc converters

FEATURES and BENEFITS

  • Ideal for current shunt applications
  • EMI filters included
  • 1 μV/°C maximum input offset drift
  • High common-mode voltage range
    −4 V to +65 V operating (5V supply)
    −4 V to +35V operating (3.3V supply)
    −25 V to +75 V survival
  • Gain = 20 V/V
  • 3.3 V to 5.5 V supply range
  • Wide operating temperature range: −40°C to +125°C
  • Bidirectional current monitoring
  • <500 nV/°C typical offset drift
  • <10 ppm/°C typical gain drift
  • >90 dB CMRR dc to 10 kHz
  • Qualified for automotive applications

Functional Block Diagram

Video: AD8207 High Voltage Current Sense Amplifier

Documentation

Title Content Type File Type
AD8207: Zero-Drift, High Voltage, Bidirectional Difference Amplifier Data Sheet (Rev 0, 08/2010) (pdf, 434 kB) Data Sheets PDF
AN-1308: Common-Mode Step Response of Current Sense Amplifiers  (pdf, 176 kB) Application Notes PDF
AD8207: High Voltage Current Sense Amplifier
The AD8207 high-voltage current sense amplifier is the first to deliver a max 1 uV/°C offset temperature drift while featuring negative common-mode voltage operation and high bandwidth. It is suitable for a variety of PWM closed-loop current systems.
Videos HTML
RAQs index Rarely Asked Questions HTML
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Design Tools,Models,Drivers & Software

Title Content Type File Type
AD8207 SPICE Macro-Model SPICE Models 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.

SampleSample & Buy

Price, packaging, availability

AD8207 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD8207WBRZ Status: Production 8 ld SOIC 8 Auto Tube, 98 $2.37 $2.29 Y  Material Info PCN Purchase Sample
AD8207WBRZ-R7 Status: Production 8 ld SOIC 8 Auto Reel, 1000 $2.37 $2.29 Y  Material Info PCN Purchase
AD8207WBRZ-RL Status: Production 8 ld SOIC 8 Auto Reel, 2500 $2.37 $2.29 Y  Material Info PCN 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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