AD5258

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TABLE OF CONTENTS

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

Electrical Characteristics............................................................. 3

Timing Characteristics ................................................................ 5

Absolute Maximum Ratings............................................................ 6

ESD Caution.................................................................................. 6

Pin Configuration and Function Descriptions............................. 7

Typical Performance Characteristics ............................................. 8

Test Circuits..................................................................................... 13

Theory of Operation ...................................................................... 14

Programming the Variable Resistor......................................... 14

Programming the Potentiometer Divider ............................... 14

I2C Interface..................................................................................... 15

I2C Byte Formats ............................................................................. 16

Generic Interface ........................................................................ 16

Write Modes................................................................................ 17

Read Modes................................................................................. 17

Store/Restore Modes .................................................................. 17

Tolerance Readback Modes ...................................................... 18

ESD Protection of Digital Pins and Resistor Terminals........ 19

Power-Up Sequence ................................................................... 19

Layout and Power Supply Bypassing ....................................... 19

Multiple Devices on One Bus ................................................... 19

Evaluation Board ........................................................................ 19

Display Applications ...................................................................... 20

Circuitry ...................................................................................... 20

Outline Dimensions ....................................................................... 21

Ordering Guide .......................................................................... 21

REVISION HISTORY

3/05—Revision 0: Initial Version