High Voltage, Precision Difference Amplifier Data Sheet AD8209A FEATURES FUNCTIONAL BLOCK DIAGRAM V A1 A2 S 8000 V HBM ESD for shunt-based applications AEC-Q100 qualified AD8209A EMI FILTER EMI filters included EMI High common-mode voltage range +IN + FILTER + G = 7 G = 2 OUT 2 V to +50 V operating EMI IN FILTER 20 V to +70 V survival Buffered output voltage Gain = 14 V/V Low-pass filter (single-pole or two-pole) Wide operating temperature range: 40C to +125C GND Excellent ac and dc performance Figure 1. 1 mV typical voltage offset 5 ppm/C typical gain drift 80 dB CMRR minimum dc to 10 kHz Qualified for automotive applications APPLICATIONS High-side current sensing Motor controls Solenoid controls Power management Low-side current sensing Diagnostic protection GENERAL DESCRIPTION The AD8209A is a single-supply difference amplifier ideal for Automotive applications demand robust, precision components for amplifying and low-pass filtering small differential voltages in the improved system control. The AD8209A provides excellent ac and presence of a large common-mode voltage. The input common- dc performance, minimizing errors in the application. Typical mode voltage range extends from 2 V to +50 V at a single 5 V offset and gain drift in the MSOP package are less than 5 V/C supply. The AD8209A is qualified per AEC-Q100 specifications. and 5 ppm/C, respectively. The device also delivers a minimum The amplifier offers enhanced input overvoltage and ESD common-mode rejection ratio (CMRR) of 80 dB from dc to protection, and includes electromagnetic interference (EMI) 10 kHz. filtering. The AD8209A features an externally accessible 100 k resistor at the output of the preamplifier (A1) that can be used for low- pass filtering and for establishing gains other than 14 V/V. Rev. A 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 2016 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com 14511-001AD8209A Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 High-Side Current Sensing with a Low-Side Switch ............. 11 Applications ....................................................................................... 1 High Rail Current Sensing ........................................................ 11 Functional Block Diagram .............................................................. 1 Low-Side Current Sensing ........................................................ 11 General Description ......................................................................... 1 Gain Adjustment ........................................................................ 12 Revision History ............................................................................... 2 Gain Trim .................................................................................... 13 Specifications ..................................................................................... 3 Low-Pass Filtering ...................................................................... 13 Absolute Maximum Ratings ............................................................ 4 High Line Current Sensing with Low-Pass Filtering and Gain Adjustment .................................................................................. 14 ESD Caution .................................................................................. 4 Outline Dimensions ....................................................................... 15 Pin Configuration and Function Descriptions ............................. 5 Ordering Guide .......................................................................... 15 Typical Performance Characteristics ............................................. 6 Automotive Products ................................................................. 15 Theory of Operation ...................................................................... 10 Applications Information .............................................................. 11 REVISION HISTORY 11/2016Rev. 0 to Rev. A Change to Figure 27 ....................................................................... 11 7/2016Revision 0: Initial Version Rev. A Page 2 of 15