AD8207

Zero Drift, High Voltage, Bidirectional Difference Amplifier
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Product Details

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

Product Lifecycle

checked Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

AD8207 Material Declaration
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Overview

2 Reviews
2 out of 2 (100%) customers recommend this product.
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Most Helpful Review

by Anonymous
Functional Blockdiagram on Page 1: the Vref-resistors are incorrect connected to the minus-Op-input. Page 10 Figure 25: For Gain=400 there needs to have 250 Ohm Resistors in the differential Amplifier.

Most Recent Review

by anon
Figure 34, 3 phase motor control has solder dots shorting all 3 phases to node labeled "Iu". Also has coil "Iv" attched to a transistor's base terminal. Figures 35 and 36 have upside-down (negative) batteries.

All Reviews

by anon, 7 Jan 15
More wrong schemaitcs in Datasheet
Figure 34, 3 phase motor control has solder dots shorting all 3 phases to node labeled "Iu". Also has coil "Iv" attched to a transistor's base terminal. Figures 35 and 36 have upside-down (negative) batteries.
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by Anonymous, 29 Oct 13
Wrong schematics in your Datasheet
Functional Blockdiagram on Page 1: the Vref-resistors are incorrect connected to the minus-Op-input. Page 10 Figure 25: For Gain=400 there needs to have 250 Ohm Resistors in the differential Amplifier.
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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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