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AD5112 Datasheet(PDF) 2 Page - Analog Devices

Part No. AD5112
Description  Single-Channel, 128-/64-/32-Position, I2C, ±8% Resistor Tolerance, Nonvolatile Digital Potentiometer
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD5112 Datasheet(HTML) 2 Page - Analog Devices

 
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AD5110/AD5112/AD5114
Data Sheet
Rev. 0 | Page 2 of 28
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics—AD5110 .......................................... 3
Electrical Characteristics—AD5112 .......................................... 5
Electrical Characteristics—AD5114 .......................................... 7
Interface Timing Specifications.................................................. 9
Shift Register and Timing Diagram......................................... 10
Absolute Maximum Ratings.......................................................... 11
Thermal Resistance .................................................................... 11
ESD Caution................................................................................ 11
Pin Configuration and Function Descriptions........................... 12
Typical Performance Characteristics ........................................... 13
Test Circuits..................................................................................... 18
Theory of Operation ...................................................................... 19
RDAC Register and EEPROM.................................................. 19
I2C Serial Data Interface............................................................ 19
Input Shift Register .................................................................... 20
Write Operation.......................................................................... 21
EEPROM Write Acknowlegde Polling .................................... 23
Read Operation........................................................................... 23
Reset............................................................................................. 23
Shutdown Mode ......................................................................... 23
RDAC Architecture.................................................................... 24
Programming the Variable Resistor......................................... 24
Programming the Potentiometer Divider............................... 25
Terminal Voltage Operating Range ......................................... 26
Power-Up Sequence ................................................................... 26
Layout and Power Supply Biasing............................................ 26
Outline Dimensions....................................................................... 27
Ordering Guide .......................................................................... 27
REVISION HISTORY
10/11—Revision 0: Initial Version


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