AD5254 データシートの表示（PDF） - Analog Devices

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AD5254

Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers

Analog Devices 

AD5253/AD5254

TABLE OF CONTENTS

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

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

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

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

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

Electrical Characteristics ................................................................. 3

1 kΩ Version.................................................................................. 3

10 kΩ, 50 kΩ, 100 kΩ Versions .................................................. 5

Interface Timing Characteristics ................................................ 7

Absolute Maximum Ratings............................................................ 8

ESD Caution.................................................................................. 8

Pin Configuration and Function Descriptions............................. 9

Typical Performance Characteristics ........................................... 10

I2C Interface..................................................................................... 14

I2C Interface General Description............................................ 14

I2C Interface Detail Description ............................................... 15

REVISION HISTORY

10/09—Rev. A to Rev. B

Change to Figure 27 ....................................................................... 15

9/05—Rev. 0 to Rev. A

Change to Figure 6 ......................................................................... 10

Change to EEMEM Write Protection Section ............................ 18

Changes to Figure 37...................................................................... 22

Deleted Table 13 and Table 14 ...................................................... 24

Change to Figure 43 ....................................................................... 25

Changes to Ordering Guide .......................................................... 29

5/03—Revision 0: Initial Version

I2C-Compatible 2-Wire Serial Bus ........................................... 20

Theory of Operation ...................................................................... 21

Linear Increment/Decrement Commands ............................. 21

±6 dB Adjustments (Doubling/Halving Wiper Setting) ....... 21

Digital Input/Output Configuration........................................ 22

Multiple Devices on One Bus ................................................... 22

Terminal Voltage Operation Range ......................................... 23

Power-Up and Power-Down Sequences.................................. 23

Layout and Power Supply Biasing ............................................ 23

Digital Potentiometer Operation ............................................. 24

Programmable Rheostat Operation......................................... 24

Programmable Potentiometer Operation ............................... 25

Applications Information .............................................................. 26

RGB LED Backlight Controller for LCD Panels .................... 26

Outline Dimensions ....................................................................... 28

Ordering Guide .......................................................................... 29

Rev. B | Page 2 of 32

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