AD5121/AD5141

Data Sheet

Rev. 0 | Page 2 of 32

TABLE OF CONTENTS

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

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

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

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

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

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

Electrical Characteristics—AD5121 .......................................... 3

Electrical Characteristics—AD5141 .......................................... 6

Interface Timing Specifications.................................................. 9

Shift Register and Timing Diagrams ....................................... 10

Absolute Maximum Ratings.......................................................... 12

Thermal Resistance .................................................................... 12

ESD Caution................................................................................ 12

Pin Configuration and Function Descriptions........................... 13

Typical Performance Characteristics ........................................... 14

Test Circuits..................................................................................... 19

Theory of Operation ...................................................................... 20

RDAC Register and EEPROM.................................................. 20

Input Shift Register .................................................................... 20

Serial Data Digital Interface Selection, DIS............................ 20

SPI Serial Data Interface............................................................ 20

I2C Serial Data Interface............................................................ 22

I2C Address.................................................................................. 22

Advanced Control Modes ......................................................... 23

EEPROM or RDAC Register Protection................................. 24

Load RDAC Input Register (LRDAC)..................................... 24

INDEP Pin................................................................................... 24

RDAC Architecture.................................................................... 27

Programming the Variable Resistor......................................... 27

Programming the Potentiometer Divider............................... 28

Terminal Voltage Operating Range ......................................... 29

Power-Up Sequence ................................................................... 29

Layout and Power Supply Biasing............................................ 29

Outline Dimensions....................................................................... 30

Ordering Guide .......................................................................... 30

REVISION HISTORY

10/12—Revision 0: Initial Version