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AD8217BRMZ-R7 데이터시트(PDF) 1 Page - Analog Devices |
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AD8217BRMZ-R7 데이터시트(HTML) 1 Page - Analog Devices |
1 / 16 page High Resolution, Zero -Drift Current Shunt Monitor AD8217 Rev. 0 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 ©2010 Analog Devices, Inc. All rights reserved. FEATURES High common-mode voltage range 4.5 V to 80 V operating 0 V to 85 V survival Buffered output voltage Wide operating temperature range: −40°C to +125°C Excellent ac and dc performance ±100 nV/°C typical offset drift ±100 µV/°C typical offset ±5 ppm/°C typical gain drift 100 dB typical CMRR at dc APPLICATIONS High side current sensing 48 V telecom Power management Base stations Unidirectional motor control Precision high voltage current sources FUNCTIONAL BLOCK DIAGRAM LDO R2 R1 AD8217 R4 R3 +IN GND –IN OUT Figure 1. GENERAL DESCRIPTION The AD8217 is a high voltage, high-resolution current shunt amplifier. It features a set gain of 20 V/V, with a maximum ±0.35% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. The AD8217 offers excellent common-mode rejection from 4.5 V to 80 V, and includes an internal LDO, which directly powers the device from the high voltage rail. Therefore, no addi- tional supply is necessary, provided that the input common-mode range is 4.5 V to 80 V. The AD8217 performs unidirectional current measurements across a shunt resistor in a variety of industrial and telecom applications including motor control, battery management, and base station power amplifier bias control. The AD8217 offers breakthrough performance throughout the −40°C to +125°C temperature range. It features a zero-drift core, which leads to a typical offset drift of ±100 nV/°C throughout the operating temperature and common-mode voltage range. Special attention is devoted to output linearity being maintained throughout the input differential voltage range of 0 mV to 250 mV, regardless of the common-mode voltage present, and the typical input offset voltage is ±100 μV. The AD8217 is offered in a 8-lead MSOP package and is specified from −40°C to +125°C. |
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