Datasheet

AD5253/AD5254 Data Sheet
Rev. C | Page 2 of 32
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
I
2
C Interface ..................................................................................... 14
I
2
C Interface General Description ............................................ 14
I
2
C Interface Detail Description ............................................... 15
I
2
C-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
REVISION HISTORY
9/12—Rev. B to Rev. C
Changed Temperature Range from –40°C to +85°C to –40°C
to +105°C (Throughout).................................................................. 1
Changed
WP
Leakage Current from 5 µA to 8 µA, Table 1 ........ 4
Changed
WP
Leakage Current from 5 µA to 8 µA, Table 2 ........ 5
Changes to Figure 11 and Figure 12 ............................................. 12
Changes to Ordering Guide .......................................................... 29
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