AD5247 查看數據表（PDF） - Analog Devices

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AD5247

128-Position I2C-Compatible Digital Potentiometer

Analog Devices 

AD5247

TABLE OF CONTENTS

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

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

Functional Block Diagram .............................................................. 1

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

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

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

Electrical Characteristics—5 kΩ Version.................................. 3

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

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

Timing Characteristics—5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ

Versions.......................................................................................... 5

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

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

Pin Configuration and Function Descriptions............................. 7

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

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

REVISION HISTORY

5/12—Rev. E to Rev. F

Changes to Features and General Description Sections.............. 1

Changes to IDD Parameters, Table 1 ................................................ 3

Changes to IDD Parameters, Table 2 ................................................ 4

Changes to Figure 15........................................................................ 9

Changes to Figure 16...................................................................... 10

Removed Evaluation Board Section............................................. 17

Changes to Ordering Guide .......................................................... 18

1/11—Rev. D to Rev. E

Change to Table 1, Added Output Logic Low .............................. 3

Change to Table 2, Added Output Logic Low .............................. 4

3/10—Rev. C to Rev. D

Changes to Table 9 and Table 10................................................... 14

10/09—Rev. B to Rev. C

Changes to Zero-Scale Error (10 kΩ) Parameter, Table 2........... 4

Changes to Ordering Guide .......................................................... 18

Data Sheet

I2C Interface .................................................................................... 13

Theory of Operation ...................................................................... 14

Programming the Variable Resistor......................................... 14

Programming the Potentiometer Divider ............................... 15

I2C-Compatible 2-Wire Serial Bus ........................................... 15

Level Shifting for Bidirectional Interface ................................ 16

ESD Protection ........................................................................... 16

Terminal Voltage Operating Range ......................................... 16

Maximum Operating Current .................................................. 16

Power-Up Sequence ................................................................... 16

Layout and Power Supply Bypassing ....................................... 17

Constant Bias to Retain Resistance Setting............................. 17

Outline Dimensions ....................................................................... 18

Ordering Guide .......................................................................... 18

3/07—Rev. A to Rev. B

Changes to General Description Section .......................................1

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

Changes to I2C-Compatible 2-Wire Serial Bus Section ............ 15

Changes to Ordering Guide .......................................................... 18

7/06—Rev. 0 to Rev. A

Updated Format..................................................................Universal

Changes to Absolute Maximum Ratings section ..........................6

Changes to Ordering Guide .......................................................... 18

9/03—Revision 0: Initial Version

Rev. F | Page 2 of 20

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