AD5243(RevC) 查看數據表（PDF） - Analog Devices

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AD5243
(Rev.:RevC)

Dual, 256-Position, I2C-Compatible Digital Potentiometers

Analog Devices 

AD5243/AD5248

TABLE OF CONTENTS

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

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

Functional Block Diagrams............................................................. 1

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

Revision History ............................................................................... 2

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

Electrical Characteristics: 2.5 kΩ Version................................. 3

Electrical Characteristics: 10 kΩ, 50 kΩ, and 100 kΩ

Versions.......................................................................................... 4

Timing Characteristics: All Versions ......................................... 5

Absolute Maximum Ratings............................................................ 6

ESD Caution.................................................................................. 6

Pin Configurations and Function Descriptions ........................... 7

Typical Performance Characteristics ............................................. 8

REVISION HISTORY

4/16—Rev. B to Rev. C

Changes to Applications Section and General Description

Section................................................................................................ 1

Changed Digital Inputs and Outputs Parameter to Digital

Inputs Parameter, Table 1 ................................................................ 3

Changed Digital Inputs and Outputs Parameter to Digital

Inputs Parameter, Table 2 ................................................................ 4

Changes to Ordering Guide .......................................................... 19

4/12—Rev. A to Rev. B

Changes to Rheostat Operation Section, Table 7, and

Table 8 .............................................................................................. 13

Changes to Voltage Output Operation Section .......................... 14

Deleted Evaluation Board Section and Figure 45, Renumbered

Sequentially ..................................................................................... 15

Changes to Table 13........................................................................ 17

Updated Outline Dimensions ....................................................... 19

Changes to Ordering Guide .......................................................... 19

Data Sheet

Test Circuits..................................................................................... 12

Theory of Operation ...................................................................... 13

Programming the Variable Resistor and Voltage ................... 13

Programming the Potentiometer Divider ............................... 14

ESD Protection ........................................................................... 14

Terminal Voltage Operating Range ......................................... 14

Power-Up Sequence ................................................................... 14

Layout and Power Supply Bypassing ....................................... 14

Constant Bias to Retain Resistance Setting............................. 15

I2C Interface .................................................................................... 16

I2C Compatible, 2-Wire Serial Bus .......................................... 16

I2C Controller Programming .................................................... 18

Outline Dimensions ....................................................................... 19

Ordering Guide .......................................................................... 19

4/09—Rev. 0 to Rev. A

Changes to DC Characteristics—Rheostat Mode Parameter and

to DC Characteristics—Potentiometer Divider Mode Parameter,

Table 1 .................................................................................................3

Moved Figure 3 ..................................................................................5

Updated Outline Dimensions ....................................................... 19

Changes to Ordering Guide .......................................................... 19

1/04—Revision 0: Initial Version

Rev. C | Page 2 of 20

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