AD5112 데이터 시트보기 (PDF) - Analog Devices

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AD5112

Single-Channel, 128-/64-/32-Position, I2C, ±8% Resistor Tolerance, Nonvolatile Digital Potentiometer

Analog Devices 

AD5110/AD5112/AD5114

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

REVISION HISTORY

10/11—Revision 0: Initial Version

Data Sheet

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

Rev. 0 | Page 2 of 28

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