AD5121/AD5141
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
REVISION HISTORY
10/12—Revision 0: Initial Version
Data Sheet
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
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