AD5291/AD5292

Rev. 0 | Page 2 of 28

TABLE OF CONTENTS

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

 

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

 

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

 

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

 

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

 

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

 

Electrical Characteristics—AD5291 .......................................... 3

 

Resistor Performance Mode Code Range—AD5291............... 4

 

Electrical Characteristics—AD5292 .......................................... 5

 

Resistor Performance Mode Code Range—AD5292............... 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

 

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

 

20-TP Memory ........................................................................... 19

 

Write Protection ......................................................................... 19

 

Basic Operation .......................................................................... 20

 

20-TP Readback and Spare Memory Status ........................... 20

 

Shutdown Mode ......................................................................... 21

 

Resistor Performance Mode...................................................... 21

 

Reset ............................................................................................. 21

 

Daisy-Chain Operation ............................................................. 21

 

RDAC Architecture.................................................................... 21

 

Programming the Variable Resistor......................................... 21

 

Programming the Potentiometer Divider............................... 22

 

EXT_CAP Capacitor.................................................................. 22

 

Terminal Voltage Operating Range ......................................... 23

 

Applications Information .............................................................. 24

 

High Voltage DAC...................................................................... 24

 

Programmable Voltage Source with Boosted Output ........... 24

 

High Accuracy DAC .................................................................. 24

 

Variable Gain Instrumentation Amplifier .............................. 24

 

Audio Volume Control .............................................................. 25

 

Outline Dimensions ....................................................................... 26

 

Ordering Guide .......................................................................... 26

 

REVISION HISTORY

5/09—Revision 0: Initial Version