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AD5293

Single-Channel, 1024-Position, 1% R-Tolerance Digital Potentiometer

Analog Devices 

AD5293

TABLE OF CONTENTS

Features ...............................................................................................1

Applications........................................................................................1

Functional Block Diagram ...............................................................1

General Description ..........................................................................1

Revision History ................................................................................2

Specifications......................................................................................3

Electrical Characteristics—20 kΩ Versions ...............................3

Resistor Performance Mode Code Range—20 kΩ Versions ...4

Electrical Characteristics—50 kΩ and 100 kΩ Versions..........5

Resistor Performance Mode Code Range—50 kΩ and 100 kΩ

Versions...........................................................................................6

Interface Timing Specifications...................................................7

Timing Diagrams...........................................................................8

Absolute Maximum Ratings.............................................................9

Thermal Resistance .......................................................................9

ESD Caution...................................................................................9

Pin Configuration and Function Descriptions........................... 10

Typical Performance Characteristics ........................................... 11

Test Circuits..................................................................................... 17

Theory of Operation ...................................................................... 18

Serial Data Interface................................................................... 18

Shift Register ............................................................................... 18

REVISION HISTORY

3/11—Rev. C to Rev. D

Changes to Table 1, Endnote 2 ................................................................4

Changes to Table 3, Endnote 2........................................................ 6

9/10—Rev. B to Rev. C

Added CPOL = 0, CPHA = 1 to Figure 3 and Figure 4 Captions.....8

Changes to SDO Pin and Daisy-Chain Operation Section....... 19

3/10—Rev. A to Rev. B

Changes to Resistor Noise Density Conditions (Table 3) ........... 6

12/09—Rev. 0 to Rev. A

Added 50 kΩ and 100 kΩ Specifications.........................Universal

Changes to Features Section............................................................ 1

RDAC Register............................................................................ 18

Write Protection ......................................................................... 18

Basic Operation .......................................................................... 18

Shutdown Mode.......................................................................... 18

Reset ............................................................................................. 19

Resistor Performance Mode...................................................... 19

SDO Pin and Daisy-Chain Operation ..................................... 19

RDAC Architecture .................................................................... 20

Programming the Variable Resistor......................................... 20

Programming the Potentiometer Divider ............................... 21

EXT_CAP Capacitor.................................................................. 21

Terminal Voltage Operating Range.......................................... 21

Applications Information .............................................................. 22

High Voltage DAC...................................................................... 22

Programmable Voltage Source with Boosted Output............ 22

High Accuracy DAC .................................................................. 22

Variable Gain Instrumentation Amplifier............................... 22

Audio Volume Control .............................................................. 23

Outline Dimensions ....................................................................... 24

Ordering Guide........................................................................... 24

Changes to Table 1............................................................................ 3

Changes to Table 2............................................................................ 4

Added Table 3; Renumbered Sequentially .................................... 5

Added Table 4.................................................................................... 6

Changes to Table 5............................................................................ 7

Changes to Table 6 and Note 1, Table 7 ......................................... 9

Changes to Typical Performance Characteristics Section......... 11

Changes to Programming the Variable Resistor Section .......... 20

Changes to Programming the Potentiometer

Divider Section ............................................................................... 21

Changes to Ordering Guide Section ............................................ 24

4/09—Revision 0: Initial Version

Rev. D | Page 2 of 24

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