AD5227 데이터 시트보기 (PDF) - Analog Devices

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AD5227

64-Position Up/Down Control Digital Potentiometer

Analog Devices 

AD5227

TABLE OF CONTENTS

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

Interface Timing Diagrams ......................................................... 4

Absolute Maximum Ratings............................................................ 5

ESD Caution.................................................................................. 5

Pin Configuration and Function Descriptions............................. 6

Typical Performance Characteristics ............................................. 7

Theory of Operation ...................................................................... 10

Programming the Digital Potentiometers............................... 10

Digital Interface .......................................................................... 11

Terminal Voltage Operation Range ......................................... 11

Power-Up and Power-Down Sequences.................................. 11

Layout and Power Supply Biasing ............................................ 11

REVISION HISTORY

5/09—Rev. A to Rev. B

Changes to Table 2……………………………………………3

4/09—Rev. 0 to Rev. A

Changes to Table 2……………………………………………3

Changes to Ordering Guide …………………………………15

3/04—Revision 0: Initial Version

Applications..................................................................................... 12

Manual Control with Toggle and Pushbutton Switches........ 12

Manual Control with Rotary Encoder..................................... 12

Adjustable LED Driver .............................................................. 12

Adjustable Current Source for LED Driver ............................ 12

Adjustable High Power LED Driver ........................................ 13

Automatic LCD Panel Backlight Control................................ 13

6-Bit Controller .......................................................................... 13

Constant Bias with Supply to Retain Resistance Setting....... 14

Outline Dimensions ....................................................................... 15

Ordering Guide .......................................................................... 15

Rev. B | Page 2 of 16

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