Datasheet

AD5227
Rev. B | Page 2 of 16
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
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
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