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AD8212WYRMZ-RL1 Datasheet(PDF) 1 Page - Analog Devices |
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AD8212WYRMZ-RL1 Datasheet(HTML) 1 Page - Analog Devices |
1 / 16 page High Voltage Current Shunt Monitor AD8212 Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2007–2009 Analog Devices, Inc. All rights reserved. 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 APPLICATIONS Current shunt measurement Motor controls DC-to-DC converters Power supplies Battery monitoring Remote sensing FUNCTIONAL BLOCK DIAGRAM AD8212 V+ IOUT COM BIAS ALPHA VSENSE OUTPUT CURRENT COMPENSATION BIAS CIRCUIT 8 6 3 2 5 1 Figure 1. GENERAL 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). The AD8212 features a patented output base current compensa- tion 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. |
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