AD5251/AD5252

Data Sheet

Rev. E | Page 2 of 28

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

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........................................ 21

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

Terminal Voltage Operation Range ......................................... 22

Power-Up and Power-Down Sequences.................................. 22

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

Digital Potentiometer Operation ............................................. 23

Programmable Rheostat Operation......................................... 23

Programmable Potentiometer Operation ............................... 24

Applications Information .............................................................. 25

LCD Panel VCOM Adjustment.................................................... 25

Current-Sensing Amplifier ....................................................... 25

Adjustable High Power LED Driver ........................................ 25

Outline Dimensions....................................................................... 26

Ordering Guide .......................................................................... 27

REVISION HISTORY

11/2017—Rev. D to Rev. E

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

Changes to Theory of Operation Section.................................... 21

Changes to Ordering Guide .......................................................... 27

9/2012—Rev. C to Rev. D

Changed Temperature Range from –40°C to +85°C to –40°C to

+105°C (Throughout) ...................................................................... 1

Changed

EE

AA

Leakage Current from 5 µA to 8 µA, Table 1........ 4

WP

Changed

AA

AA

Leakage Current from 5 µA to 8 µA, Table 2........ 5

Changes to Figure 11 and Figure 12............................................. 11

12/2011—Rev. B to Rev. C

Changes to Theory of Operation Section.................................... 21

Changes to Ordering Guide .......................................................... 27

10/2009—Rev. A to Rev. B

Changes to Figure 15...................................................................... 12

Changes to Figure 27...................................................................... 15

9/2005—Rev. 0 to Rev. A

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

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

Changes to Figure 28...................................................................... 15

Changes to Figure 29...................................................................... 17

Changes to RDAC/EEMEM Quick Commands Section .......... 18

Changes to EEMEM Write Protection Section .......................... 18

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

Deleted Table 13 and Table 14 ...................................................... 23

Change to Figure 42 ....................................................................... 24

Change to Figure 46 ....................................................................... 25

Changes to Ordering Guide.......................................................... 27

6/2004—Revision 0: Initial Version