AD8479BRZ Analog Devices

Very High Common-Mode Voltage Precision Difference Amplifier Enhanced Product AD8479-EP FEATURES FUNCTIONAL BLOCK DIAGRAM 600 V dc common-mode voltage range AD8479-EP Rail-to-rail output REF() 1 8 NC Fixed gain of 1 Wide power supply operating voltage range of 2.5 V to 18 V +V 7 S 1M IN 2 550 A typical power supply current 6 OUTPUT Excellent ac specifications +IN 3 80 dB minimum CMRR 1M 130 kHz small signal 3 dB bandwidth V 4 S REF(+) 5 High accuracy dc performance 10 ppm maximum gain nonlinearity 15 V/C maximum offset voltage drift NOTES 1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN. 5 ppm/C maximum gain drift Figure 1. ENHANCED PRODUCT FEATURES Supports defense and aerospace applications (AQEC standard) Military temperature range (55C to +125C) Controlled manufacturing baseline One assembly/test site One fabrication site Product change notification Qualification data available on request APPLICATIONS Avionics Unmanned systems High voltage current sensing Motor controls Isolation GENERAL DESCRIPTION The AD8479-EP is a difference amplifier with a very high input Additional application and technical information can be found common-mode voltage (VCM) range. The AD8479-EP is a in the AD8479 data sheet. precision device that allows the user to accurately measure 800 V = 15V differential signals in the presence of high VCM up to 600 V dc. S 600 The AD8479-EP can replace costly isolation amplifiers in 400 V = 5V applications that do not require galvanic isolation. The device S 200 operates over a 600 V dc V range and has inputs that are CM protected from common-mode or differential mode transients 0 up to 600 V. 200 The AD8479-EP has low offset voltage, low offset voltage drift, 400 low gain drift, low common-mode rejection drift, and excellent common-mode rejection ratio (CMRR) over a wide frequency 600 range. 800 20 15 10 5 0 5 10 15 20 The AD8479-EP is available in a space-saving 8-lead SOIC package V (V) OUT and is operational over the 55C to +125C temperature range. Figure 2. Input Common-Mode Voltage vs. Output Voltage (V ) OUT Rev. 0 Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 2019 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. COMMON-MODE VOLTAGE (V) 20677-001 20677-002AD8479-EP Enhanced Product TABLE OF CONTENTS Features .............................................................................................. 1 Absolute Maximum Ratings ............................................................4 Enhanced Product Features ............................................................ 1 ESD Caution...................................................................................4 Applications ....................................................................................... 1 Pin Configuration and Function Descriptions ..............................5 Functional Block Diagram .............................................................. 1 Typical Performance Characteristics ..............................................6 General Description ......................................................................... 1 Outline Dimensions ..........................................................................7 Revision History ............................................................................... 2 Ordering Guide .............................................................................7 Specifications ..................................................................................... 3 REVISION HISTORY 6/2019Revision 0: Initial Version Rev. 0 Page 2 of 7