AD5122/AD5142
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics—AD5122 .......................................... 3
Electrical Characteristics—AD5142 .......................................... 6
Interface Timing Specifications .................................................. 9
Shift Register and Timing Diagrams ....................................... 10
Absolute Maximum Ratings.......................................................... 11
Thermal Resistance .................................................................... 11
ESD Caution................................................................................ 11
Pin Configurations and Function Descriptions ......................... 12
Typical Performance Characteristics ........................................... 14
Test Circuits..................................................................................... 19
REVISION HISTORY
10/12—Revision 0: Initial Version
Data Sheet
Theory of Operation ...................................................................... 20
RDAC Register and EEPROM.................................................. 20
Input Shift Register .................................................................... 20
SPI Serial Data Interface............................................................ 20
Advanced Control Modes ......................................................... 23
EEPROM or RDAC Register Protection ................................. 24
INDEP Pin................................................................................... 24
RDAC Architecture.................................................................... 27
Programming the Variable Resistor......................................... 27
Programming the Potentiometer Divider ............................... 28
Terminal Voltage Operating Range ......................................... 28
Power-Up Sequence ................................................................... 28
Layout and Power Supply Biasing ............................................ 28
Outline Dimensions ....................................................................... 29
Ordering Guide .......................................................................... 30
Rev. 0 | Page 2 of 32