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AD5121 Fiches technique(PDF) 2 Page - Analog Devices

No de pièce AD5121
Description  Single Channel, 128-/256-Position, I2C/SPI, Nonvolatile Digital Potentiometer
Download  32 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

AD5121 Fiches technique(HTML) 2 Page - Analog Devices

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AD5121/AD5141
Data Sheet
Rev. 0 | Page 2 of 32
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics—AD5121 .......................................... 3
Electrical Characteristics—AD5141 .......................................... 6
Interface Timing Specifications.................................................. 9
Shift Register and Timing Diagrams ....................................... 10
Absolute Maximum Ratings.......................................................... 12
Thermal Resistance .................................................................... 12
ESD Caution................................................................................ 12
Pin Configuration and Function Descriptions........................... 13
Typical Performance Characteristics ........................................... 14
Test Circuits..................................................................................... 19
Theory of Operation ...................................................................... 20
RDAC Register and EEPROM.................................................. 20
Input Shift Register .................................................................... 20
Serial Data Digital Interface Selection, DIS............................ 20
SPI Serial Data Interface............................................................ 20
I2C Serial Data Interface............................................................ 22
I2C Address.................................................................................. 22
Advanced Control Modes ......................................................... 23
EEPROM or RDAC Register Protection................................. 24
Load RDAC Input Register (LRDAC)..................................... 24
INDEP Pin................................................................................... 24
RDAC Architecture.................................................................... 27
Programming the Variable Resistor......................................... 27
Programming the Potentiometer Divider............................... 28
Terminal Voltage Operating Range ......................................... 29
Power-Up Sequence ................................................................... 29
Layout and Power Supply Biasing............................................ 29
Outline Dimensions....................................................................... 30
Ordering Guide .......................................................................... 30
REVISION HISTORY
10/12—Revision 0: Initial Version


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