Datasheet

AD5293 Data Sheet
Rev. E | Page 2 of 24
TABLE OF CONTENTS
Features ...............................................................................................1
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
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
REVISION HISTORY
3/16—Rev. D to Rev. E
Changes to Figure 21 Caption and Figure 22 Caption .............. 13
3/11—Rev. C to Rev. D
Changes to Table 1, Endnote 2 ................................................................ 4
Changes to Table 3, Endnote 2 ........................................................ 6
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
12/09—Rev. 0 to Rev. A
Added 50 kΩ and 100 kΩ Specifications ......................... Universal
Changes to Features Section............................................................ 1
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
Divider Section ............................................................................... 21
Changes to Ordering Guide Section ............................................ 24
4/09—Revision 0: Initial Version
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