High Common-Mode Voltage, Bidirectional Current Shunt Amplifier Data Sheet AD8206 FEATURES FUNCTIONAL BLOCK DIAGRAM V+ Ideal for current shunt applications 6 High common-mode voltage range +IN 8 2 V to +65 V operating 5 OUT 1 25 V to +75 V survival IN Gain = 20 Wide operating temperature range 7 AD8206 V 1 REF 40C to +125C for Y grade and WY grade 40C to +150C for WH grade 3 V 2 REF Bidirectional operation NC 4 Available in 8-lead SOIC 2 Qualified for automotive applications GND NC = NO CONNECT Figure 1. EXCELLENT AC AND DC PERFORMANCE 15 V/C offset drift 30 ppm/C gain drift 80 dB CMRR dc to 20 kHz APPLICATIONS High-side current sensing in Motor controls Transmission controls Diesel-injection controls Engine management Suspension controls Vehicle dynamic controls DC-to-dc converters GENERAL DESCRIPTION The AD8206 is a single-supply difference amplifier for amplifying The output offset can be adjusted from 0.08 V to 4.7 V with a small differential voltages in the presence of large common-mode 5 V supply by using the VREF1 and VREF2 pins. With VREF1 voltages. The operating input common-mode voltage range extends attached to the V+ pin, and VREF2 attached to the GND pin, the from 2 V to +65 V. The typical single-supply voltage is 5 V. output is set at half scale. Attaching both pins to GND causes the output to be unipolar, starting near ground. Attaching both The AD8206 is offered in an 8-lead SOIC package. The Y grade pins to V+ causes the output to be unipolar starting near V+. and WY grade models are rated for operation from 40C to Other offsets can be obtained by applying an external voltage to +125C. The WH grade is rated from 40C to +150C. the V 1 and V 2 pins. REF REF Excellent DC performance over temperature keeps errors in the measurement loop to a minimum. Offset drift is typically less than 15 V/C, and gain drift is typically below 30 ppm/C. Rev. C 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 20052014 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. 04953-001AD8206 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Ground Referenced Output ...................................................... 10 Excellent AC and DC Performance ................................................ 1 V+ Referenced Output .............................................................. 10 Applications ....................................................................................... 1 Bidirectional Operation ............................................................. 10 Functional Block Diagram .............................................................. 1 External Referenced Output ..................................................... 11 General Description ......................................................................... 1 Splitting the Supply .................................................................... 11 Revision History ............................................................................... 2 Splitting an External Reference ................................................ 11 Specif icat ions ..................................................................................... 3 Applications Information .............................................................. 12 Absolute Maximum Ratings ............................................................ 5 High-Side Current Sense with a Low-Side Switch ................. 12 ESD Caution .................................................................................. 5 High-Side Current Sense with a High-Side Switch ............... 12 Pin Configuration and Function Descriptions ............................. 6 Outline Dimensions ....................................................................... 13 Typical Performance Characteristics ............................................. 7 Ordering Guide .......................................................................... 13 Theory of Operation ........................................................................ 9 Automotive Products ................................................................. 13 Output Offset Adjustment ............................................................. 10 Unidirectional Operation .......................................................... 10 REVISION HISTORY 11/14Rev. B to Rev. C 5/10Rev. 0 to Rev. A Changes to Pin Configuration and Function Descriptions Removed Die Form ............................................................ Universal Section ................................................................................................ 6 Changes to Features, General Description Sections ..................... 1 Changed Applications Section to Applications Information Changes to Output Resistance ......................................................... 3 Section .............................................................................................. 12 Changes to Table 2 ............................................................................. 4 Changes to Theory of Operation Section....................................... 8 11/12Rev. A to Rev. B Changes to Ordering Guide .......................................................... 12 Added WH Grade Models ................................................. Universal Added Automotive Products Section .......................................... 12 Change to Product Title, Features Section, and General Description Section .......................................................................... 1 7/05Revision 0: Initial Version Changes to Table 1 ............................................................................ 3 Added Y Grade and WY Grade Parameter, Table 2 and WH Grade Parameter, Table 2 ................................................................. 5 Changes to Theory of Operation Section ...................................... 9 Updated Outline Dimensions ....................................................... 13 Changes to Ordering Guide .......................................................... 13 Rev. C Page 2 of 13