AD5255(Rev0) 데이터 시트보기 (PDF) - Analog Devices

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AD5255
(Rev.:Rev0)

3-Channel Digital Potentiometer with Nonvolatile Memory

Analog Devices 

AD5255

TABLE OF CONTENTS

Electrical Characteristics ................................................................. 3

Electrical Characteristics ................................................................. 5

Absolute Maximum Ratings............................................................ 6

ESD Caution.................................................................................. 6

Pin Configuration and Function Descriptions............................. 7

Typical Performance Characteristics ............................................. 8

Interface Descriptions .................................................................... 10

I2C Interface ................................................................................ 10

EEPROM Interface..................................................................... 11

RDAC I2C Interface.................................................................... 12

Theory of Operation ...................................................................... 15

Linear Increment and Decrement Commands ...................... 15

Logarithmic Taper Mode Adjustment (±6 dB/step) .............. 15

Using Additional Internal Nonvolatile EEPROM .................. 16

REVISION HISTORY

7/04—Revision 0: Initial Version

Digital Input/Output Configuration........................................ 16

Multiple Devices on One Bus ................................................... 16

Level Shift for Bidirectional Communication ........................ 16

Terminal Voltage Operation Range ......................................... 16

Power-Up Sequence ................................................................... 17

Layout and Power Supply Biasing ............................................ 17

RDAC Structure.......................................................................... 17

Calculating the Programmable Resistance ............................. 17

Programming the Potentiometer Divider............................... 18

Applications..................................................................................... 19

Laser Diode Driver (LDD) Calibration................................... 19

Outline Dimensions ....................................................................... 20

Ordering Guide .......................................................................... 20

Rev. 0 | Page 2 of 20

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