A W B 256-/1024-Position, Digital Potentiometers with Maximum 1% R-Tolerance Error and 20-TP Memory Data Sheet AD5291/AD5292 FEATURES FUNCTIONAL BLOCK DIAGRAM V RESET DD Single-channel, 256-/1024-position resolution 20 k, 50 k, and 100 k nominal resistance POWER-ON AD5291/ RESET Maximum 1% nominal resistor tolerance error (resistor AD5292 performance mode) V LOGIC 20-times programmable wiper memory Rheostat mode temperature coefficient: 35 ppm/C RDAC REGISTER SCLK Voltage divider temperature coefficient: 5 ppm/C SERIAL DATA INTERFACE +9 V to +33 V single-supply operation SYNC 9 V to 16.5 V dual-supply operation OTP MEMORY DIN SPI-compatible serial interface BLOCK Wiper setting readback SDO Power-on refreshed from 20-TP memory RDY APPLICATIONS V EXT CAP GND SS Mechanical potentiometer replacement Figure 1. Instrumentation: gain and offset adjustment Programmable voltage-to-current conversion Programmable filters, delays, and time constants Programmable power supply Low resolution DAC replacement Sensor calibration GENERAL DESCRIPTION The AD5291 and AD5292 are single-channel, 256-/1024- The AD5291 and AD5292 device wiper settings are controllable 1 position digital potentiometers that combine industry leading through the SPI digital interface. Unlimited adjustments are variable resistor performance with nonvolatile memory (NVM) allowed before programming the resistance value into the in a compact package. These devices are capable of operating 20-TP memory. The AD5291 and AD5292 do not require any across a wide voltage range, supporting both dual supply operation external voltage supply to facilitate fuse blow, and there are 20 at 10.5 V to 16.5 V and single supply operation at +21 V to opportunities for permanent programming. During 20-TP +33 V, while ensuring less than 1% end-to-end resistor tolerance activation, a permanent blow fuse command freezes the wiper error and offering 20-time programmable (20-TP) memory. position (analogous to placing epoxy on a mechanical trimmer). The guaranteed industry leading low resistor tolerance error The AD5291 and AD5292 are available in a compact 14-lead feature simplifies open-loop applications as well as precision TSSOP package. The part is guaranteed to operate over the calibration and tolerance matching applications. extended industrial temperature range of 40C to +105C. 1 The terms digital potentiometer and RDAC are used interchangeably. Rev. F 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 20092019 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. 07674-001AD5291/AD5292 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 20-TP Memory ........................................................................... 23 Applications ....................................................................................... 1 Write Protection ......................................................................... 23 Functional Block Diagram .............................................................. 1 Basic Operation .......................................................................... 24 General Description ......................................................................... 1 20-TP Readback and Spare Memory Status ........................... 24 Revision History ............................................................................... 2 Shutdown Mode ......................................................................... 24 Specif icat ions ..................................................................................... 3 Resistor Performance Mode ...................................................... 25 Electrical CharacteristicsAD5291 .......................................... 3 Reset ............................................................................................. 25 Resistor Performance Mode Code Range ................................. 4 SDO Pin and Daisy-Chain Operation ..................................... 25 Electrical CharacteristicsAD5292 .......................................... 6 RDAC Architecture .................................................................... 25 Resistor Performance Mode Code Range ................................. 7 Programming the Variable Resistor ......................................... 26 Interface Timing Specifications .................................................. 8 Programming the Potentiometer Divider ............................... 26 Absolute Maximum Ratings .......................................................... 10 EXT CAP Capacitor .................................................................. 27 Thermal Resistance .................................................................... 10 Terminal Voltage Operating Range ......................................... 27 ESD Caution ................................................................................ 10 Applications Information .............................................................. 28 Pin Configuration and Function Descriptions ........................... 11 High Voltage DAC ...................................................................... 28 Typical Performance Characteristics ........................................... 12 Programmable Voltage Source with Boosted Output ........... 28 Test Circuits ..................................................................................... 21 High Accuracy DAC .................................................................. 28 Theory of Operation ...................................................................... 22 Variable Gain Instrumentation Amplifier .............................. 28 Serial Data Interface ................................................................... 22 Audio Volume Control .............................................................. 29 Shift Register ............................................................................... 22 Outline Dimensions ....................................................................... 30 RDAC Register ............................................................................ 22 Ordering Guide .......................................................................... 30 REVISION HISTORY 11/2019Rev. E to Rev. F 12/2009Rev. 0 to Rev. A Change to Ordering Guide ............................................................ 30 Added 50 k and 100 k specifications ......................... Universal Changes to Features Section ............................................................ 1 12/2014Rev. D to Rev. E Changes to Table 1 ............................................................................. 3 Changes to Shift Register Section and Table 11 ......................... 22 Changes to Table 2 ............................................................................. 4 Added Table 3 .................................................................................... 5 9/2010Rev. C to Rev. D Changes to Table 4 ............................................................................. 6 Changes to SDO Pin and Daisy-Chain Operation Section ....... 25 Changes to Table 5 ............................................................................. 7 Added Table 6 .................................................................................... 8 3/2010Rev. B to Rev. C Change to Table 7 .............................................................................. 8 Changes to Revision History ........................................................... 2 Changes to Absolute Maximum Rating Section ........................ 10 Changes to Figure 3 and Figure 4 Captions .................................. 9 Changes Table 9 .............................................................................. 11 Changes to Typical Performance Characteristics Section ........ 12 3/2010Rev. A to Rev. B Changes to Ordering Guide .......................................................... 30 Changes to Data Sheet Title ............................................................ 1 Changes to General Description Section ...................................... 1 4/2009Revision 0: Initial Version Changes to Theory of Operation Section .................................... 22 Rev. F Page 2 of 30