A W B Single-Channel, 1024-Position, 1% R-Tolerance Digital Potentiometer Data Sheet AD5293 FEATURES FUNCTIONAL BLOCK DIAGRAM V RESET DD Single-channel, 1024-position resolution 20 k, 50 k, and 100 k nominal resistance POWER-ON AD5293 Calibrated 1% nominal resistor tolerance (resistor RESET performance mode) V LOGIC Rheostat mode temperature coefficient: 35 ppm/C Voltage divider temperature coefficient: 5 ppm/C RDAC 10 REGISTER SCLK Single-supply operation: 9 V to 33 V SERIAL INTERFACE Dual-supply operation: 9 V to 16.5 V SYNC SPI-compatible serial interface DIN Wiper setting readback SDO APPLICATIONS RDY Mechanical potentiometer replacement V EXT CAP GND SS Instrumentation: gain and offset adjustment Programmable voltage-to-current conversion Figure 1. Programmable filters, delays, and time constants Programmable power supply Low resolution DAC replacements Sensor calibration GENERAL DESCRIPTION The AD5293 is a single-channel, 1024-position digital potentiome- The AD5293 offers guaranteed industry-leading low resistor ter (in this data sheet, the terms digital potentiometer and RDAC tolerance errors of 1% with a nominal temperature coefficient are used interchangeably) with a <1% end-to-end resistor tolerance of 35 ppm/C. The low resistor tolerance feature simplifies open- error. The AD5293 performs the same electronic adjustment loop applications as well as precision calibration and tolerance function as a mechanical potentiometer with enhanced resolution, matching applications. solid state reliability, and superior low temperature coefficient The AD5293 is available in a compact 14-lead TSSOP package. performance. This device is capable of operating at high voltages The part is guaranteed to operate over the extended industrial and supporting both dual-supply operation at 10.5 V to 15 V temperature range of 40C to +105C. and single-supply operation at 21 V to 30 V. Rev. E 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 20092016 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. 07675-001AD5293 Data Sheet TABLE OF CONTENTS Features ...............................................................................................1 RDAC Register ............................................................................ 18 Applications ........................................................................................1 Write Protection ......................................................................... 18 Functional Block Diagram ...............................................................1 Basic Operation .......................................................................... 18 General Description ..........................................................................1 Shutdown Mode .......................................................................... 18 Revision History ................................................................................2 Reset ............................................................................................. 19 Specifications ......................................................................................3 Resistor Performance Mode ...................................................... 19 Electrical Characteristics20 k Versions ...............................3 SDO Pin and Daisy-Chain Operation ..................................... 19 Resistor Performance Mode Code Range20 k Versions ...4 RDAC Architecture .................................................................... 20 Electrical Characteristics50 k and 100 k Versions ..........5 Programming the Variable Resistor ......................................... 20 Resistor Performance Mode Code Range50 k and 100 k Programming the Potentiometer Divider ............................... 21 Versions ...........................................................................................6 EXT CAP Capacitor .................................................................. 21 Interface Timing Specifications ...................................................7 Terminal Voltage Operating Range .......................................... 21 Timing Diagrams ...........................................................................8 Applications Information .............................................................. 22 Absolute Maximum Ratings .............................................................9 High Voltage DAC ...................................................................... 22 Thermal Resistance .......................................................................9 Programmable Voltage Source with Boosted Output............ 22 ESD Caution ...................................................................................9 High Accuracy DAC .................................................................. 22 Pin Configuration and Function Descriptions ........................... 10 Variable Gain Instrumentation Amplifier ............................... 22 Typical Performance Characteristics ........................................... 11 Audio Volume Control .............................................................. 23 Test Circuits ..................................................................................... 17 Outline Dimensions ....................................................................... 24 Theory of Operation ...................................................................... 18 Ordering Guide ........................................................................... 24 Serial Data Interface ................................................................... 18 Shift Register ............................................................................... 18 REVISION HISTORY 3/16Rev. D to Rev. E Added 50 k and 100 k Specifications ......................... Universal Changes to Figure 21 Caption and Figure 22 Caption .............. 13 Changes to Features Section............................................................ 1 Changes to Table 1 ............................................................................ 3 3/11Rev. C to Rev. D Changes to Table 2 ............................................................................ 4 Added Table 3 Renumbered Sequentially .................................... 5 Changes to Table 1, Endnote 2 ................................................................ 4 Changes to Table 3, Endnote 2 ........................................................ 6 Added Table 4 .................................................................................... 6 Changes to Table 5 ............................................................................ 7 9/10Rev. B to Rev. C Changes to Table 6 and Note 1, Table 7 ......................................... 9 Added CPOL = 0, CPHA = 1 to Figure 3 and Figure 4 Captions ..... 8 Changes to Typical Performance Characteristics Section ......... 11 Changes to SDO Pin and Daisy-Chain Operation Section ....... 19 Changes to Programming the Variable Resistor Section .......... 20 Changes to Programming the Potentiometer 3/10Rev. A to Rev. B Divider Section ............................................................................... 21 Changes to Resistor Noise Density Conditions (Table 3) ........... 6 Changes to Ordering Guide Section ............................................ 24 12/09Rev. 0 to Rev. A 4/09Revision 0: Initial Version Rev. E Page 2 of 24