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AD5122 Datasheet(PDF) 2 Page - Analog Devices

Part No. AD5122
Description  Dual Channel, 128-/256-Position, SPI, Nonvolatile Digital Potentiometer
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD5122 Datasheet(HTML) 2 Page - Analog Devices

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AD5122/AD5142
Data Sheet
Rev. C | Page 2 of 32
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics—AD5122 .......................................... 3
Electrical Characteristics—AD5142 .......................................... 6
Interface Timing Specifications.................................................. 9
Shift Register and Timing Diagrams ....................................... 10
Absolute Maximum Ratings.......................................................... 11
Thermal Resistance .................................................................... 11
ESD Caution................................................................................ 11
Pin Configurations and Function Descriptions ......................... 12
Typical Performance Characteristics ........................................... 14
Test Circuits..................................................................................... 19
Theory of Operation ...................................................................... 20
RDAC Register and EEPROM.................................................. 20
Input Shift Register .................................................................... 20
SPI Serial Data Interface............................................................ 20
Advanced Control Modes ......................................................... 23
EEPROM or RDAC Register Protection................................. 24
INDEP Pin................................................................................... 24
RDAC Architecture.................................................................... 27
Programming the Variable Resistor......................................... 27
Programming the Potentiometer Divider............................... 28
Terminal Voltage Operating Range ......................................... 28
Power-Up Sequence ................................................................... 28
Layout and Power Supply Biasing............................................ 28
Outline Dimensions....................................................................... 29
Ordering Guide .......................................................................... 30
Automotive Products................................................................. 30
REVISION HISTORY
5/2017—Rev. B to Rev. C
Changes to Figure 6 and Table 8................................................... 12
Changes to Figure 16 and Figure 17............................................. 15
Changes to EEPROM or RDAC Register Protection Section........ 24
Updated Outline Dimensions....................................................... 29
Changes to Ordering Guide .......................................................... 30
6/2016—Rev. A to Rev. B
Changes to Features Section............................................................ 1
Changes to Logic Supply Current Parameter, Table 2 ................. 4
Changes to Logic Supply Current Parameter, Table 3 ................. 7
Changes to Figure 16...................................................................... 15
Added Figure 17; Renumbered Sequentially .............................. 15
Changes to Figure 18...................................................................... 16
Change to Linear Gain Setting Mode Section ............................ 23
Changes to RDAC Architecture Section ..................................... 27
Changes to Ordering Guide.......................................................... 30
Added Automotive Products Section .......................................... 30
2/2016—Rev. 0 to Rev. A
Changes to Features Section ............................................................1
Added Endnote, Table 2 ...................................................................5
Added Endnote, Table 3 ...................................................................8
Added Endnote, Table 4 ...................................................................9
Changes to Figure 3 Caption and Figure 4 Caption .................. 10
Changes to Table 6.......................................................................... 11
Changes to Figure 6........................................................................ 12
10/2012—Revision 0: Initial Version


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