AD5243/AD5248
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
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
I2C Interface .................................................................................... 16
I2C Compatible, 2-Wire Serial Bus .......................................... 16
I2C Controller Programming.................................................... 18
Outline Dimensions....................................................................... 19
Ordering Guide .......................................................................... 19
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
REVISION HISTORY
4/12—Rev. A to Rev. B
4/09—Rev. 0 to Rev. A
Changes to Rheostat Operation Section, Table 7, and
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
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
1/04—Revision 0: Initial Version
Rev. B | Page 2 of 20