Datasheet

AD5243/AD5248 Data Sheet
Rev. B | Page 2 of 20
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagrams ............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Electrical Characteristics: 2.5 kΩ Version ................................. 3
Electrical Characteristics: 10 kΩ, 50 kΩ, and 100 kΩ
Versions .......................................................................................... 4

Timing Characteristics: All Versions ......................................... 5
Absolute Maximum Ratings ............................................................ 6
ESD Caution .................................................................................. 6
Pin Configurations and Function Descriptions ........................... 7
Typical Performance Characteristics ............................................. 8
Test Circuits ..................................................................................... 12
Theory of Operation ...................................................................... 13
Programming the Variable Resistor and Voltage ................... 13
Programming the Potentiometer Divider ............................... 14
ESD Protection ........................................................................... 14
Terminal Voltage Operating Range ......................................... 14
Power-Up Sequence ................................................................... 14
Layout and Power Supply Bypassing ....................................... 14
Constant Bias to Retain Resistance Setting ............................. 15
I
2
C Interface .................................................................................... 16
I
2
C Compatible, 2-Wire Serial Bus .......................................... 16
I
2
C Controller Programming .................................................... 18
Outline Dimensions ....................................................................... 19
Ordering Guide .......................................................................... 19
REVISION HISTORY
4/12—Rev. A to Rev. B
Changes to Rheostat Operation Section, Table 7, and
Table 8 ............................................................................................... 13
Changes to Voltage Output Operation Section ........................... 14
Deleted Evaluation Board Section and Figure 45, Renumbered
Sequentially ...................................................................................... 15
Changes to Table 13 ......................................................................... 17
Updated Outline Dimensions ........................................................ 19
Changes to Ordering Guide ........................................................... 19
4/09—Rev. 0 to Rev. A
Changes to DC Characteristics—Rheostat Mode Parameter and
to DC Characteristics—Potentiometer Divider Mode Parameter,
Table 1 ................................................................................................. 3
Moved Figure 3 .................................................................................. 5
Updated Outline Dimensions ........................................................ 19
Changes to Ordering Guide ........................................................... 19
1/04—Revision 0: Initial Version