AD5293
TABLE OF CONTENTS
Features ...............................................................................................1
RDAC Register............................................................................ 18
Write Protection ......................................................................... 18
Basic Operation .......................................................................... 18
Shutdown Mode.......................................................................... 18
Reset ............................................................................................. 19
Resistor Performance Mode...................................................... 19
SDO Pin and Daisy-Chain Operation..................................... 19
RDAC Architecture.................................................................... 20
Programming the Variable Resistor......................................... 20
Programming the Potentiometer Divider............................... 21
EXT_CAP Capacitor.................................................................. 21
Terminal Voltage Operating Range.......................................... 21
Applications Information .............................................................. 22
High Voltage DAC...................................................................... 22
Programmable Voltage Source with Boosted Output............ 22
High Accuracy DAC .................................................................. 22
Variable Gain Instrumentation Amplifier............................... 22
Audio Volume Control .............................................................. 23
Outline Dimensions ....................................................................... 24
Ordering Guide........................................................................... 24
Applications........................................................................................1
Functional Block Diagram ...............................................................1
General Description..........................................................................1
Revision History ................................................................................2
Specifications......................................................................................3
Electrical Characteristics—20 kΩ Versions...............................3
Resistor Performance Mode Code Range—20 kΩ Versions ...4
Electrical Characteristics—50 kΩ and 100 kΩ Versions..........5
Resistor Performance Mode Code Range—50 kΩ and 100 kΩ
Versions...........................................................................................6
Interface Timing Specifications...................................................7
Timing Diagrams...........................................................................8
Absolute Maximum Ratings.............................................................9
Thermal Resistance .......................................................................9
ESD Caution...................................................................................9
Pin Configuration and Function Descriptions........................... 10
Typical Performance Characteristics ........................................... 11
Test Circuits..................................................................................... 17
Theory of Operation ...................................................................... 18
Serial Data Interface................................................................... 18
Shift Register ............................................................................... 18
REVISION HISTORY
3/11—Rev. C to Rev. D
Changes to Table 1, Endnote 2 ................................................................4
Changes to Table 3, Endnote 2........................................................ 6
Changes to Table 1............................................................................ 3
Changes to Table 2............................................................................ 4
Added Table 3; Renumbered Sequentially .................................... 5
Added Table 4.................................................................................... 6
Changes to Table 5............................................................................ 7
Changes to Table 6 and Note 1, Table 7......................................... 9
Changes to Typical Performance Characteristics Section......... 11
Changes to Programming the Variable Resistor Section .......... 20
Changes to Programming the Potentiometer
9/10—Rev. B to Rev. C
Added CPOL = 0, CPHA = 1 to Figure 3 and Figure 4 Captions.....8
Changes to SDO Pin and Daisy-Chain Operation Section....... 19
3/10—Rev. A to Rev. B
Changes to Resistor Noise Density Conditions (Table 3) ........... 6
Divider Section ............................................................................... 21
Changes to Ordering Guide Section ............................................ 24
12/09—Rev. 0 to Rev. A
Added 50 kΩ and 100 kΩ Specifications.........................Universal
Changes to Features Section............................................................ 1
4/09—Revision 0: Initial Version
Rev. D | Page 2 of 24
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