Data Sheet

AD5123/AD5143

TABLE OF CONTENTS

analog.com

Rev. C | 2 of 25

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

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

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

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

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

Electrical Characteristics—AD5123................... 3

Electrical Characteristics—AD5143................... 5

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

Shift Register and Timing Diagrams...................8

Absolute Maximum Ratings.................................10

Thermal Resistance......................................... 10

ESD Caution.....................................................10

Pin Configuration and Function Descriptions.......11

Typical Performance Characteristics................... 12

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

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

RDAC Register and EEPROM......................... 18

Input Shift Register...........................................19

I2C Serial Data Interface.................................. 19

I2C Address...................................................... 19

Advanced Control Modes.................................19

EEPROM or RDAC Register Protection...........22

RDAC Architecture........................................... 22

Programming the Variable Resistor..................23

Programming the Potentiometer Divider.......... 23

Terminal Voltage Operating Range.................. 24

Power-Up Sequence........................................ 24

Layout and Power Supply Biasing....................24

Outline Dimensions............................................. 25

Ordering Guide.................................................25

RAB (kΩ), Resolution, and Interface Options....25

Evaluation Boards............................................ 25

REVISION HISTORY

1/2022—Rev. B to Rev. C

Changes to Nominal Resistance Match Parameter, Single-Supply Power Range Parameter, and Dual-

Supply Power Range Parameter, Table 2...................................................................................................... 3

Changes to Nominal Resistance Match Parameter, Single-Supply Power Range Parameter, and Dual-

Supply Power Range Parameter, Table 2...................................................................................................... 5

Changes to Table 5........................................................................................................................................10

Moved Table 8 and Table 9............................................................................................................................18

Change to Input Shift Register Section..........................................................................................................19

Moved Table 11, Table 12, and Table 13........................................................................................................19

Updated Outline Dimensions......................................................................................................................... 25

Changes to Ordering Guide........................................................................................................................... 25

Added RAB (kΩ), Resolution, and Interface Options Section......................................................................... 25