AD9645

Data Sheet

Rev. 0 | Page 2 of 36

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

General Description ......................................................................... 1

Functional Block Diagram .............................................................. 1

Product Highlights ........................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

DC Specifications ......................................................................... 3

AC Specifications.......................................................................... 4

Digital Specifications ................................................................... 5

Switching Specifications .............................................................. 6

Timing Specifications .................................................................. 6

Absolute Maximum Ratings.......................................................... 10

Thermal Resistance .................................................................... 10

ESD Caution................................................................................ 10

Pin Configuration and Function Descriptions........................... 11

Typical Performance Characteristics ........................................... 12

AD9645-80 .................................................................................. 12

AD9645-125 ................................................................................ 15

Equivalent Circuits ......................................................................... 18

Theory of Operation ...................................................................... 19

Analog Input Considerations.................................................... 19

Voltage Reference ....................................................................... 20

Clock Input Considerations...................................................... 21

Power Dissipation and Power-Down Mode ........................... 22

Digital Outputs and Timing ..................................................... 23

Output Test Modes..................................................................... 26

Serial Port Interface (SPI).............................................................. 27

Configuration Using the SPI..................................................... 27

Hardware Interface..................................................................... 28

Configuration Without the SPI ................................................ 28

SPI Accessible Features.............................................................. 28

Memory Map .................................................................................. 29

Reading the Memory Map Register Table............................... 29

Memory Map Register Table..................................................... 30

Memory Map Register Descriptions........................................ 33

Applications Information .............................................................. 35

Design Guidelines ...................................................................... 35

Power and Ground Guidelines ................................................. 35

Exposed Pad Thermal Heat Slug Recommendations............ 35

VCM............................................................................................. 35

Reference Decoupling................................................................ 35

SPI Port........................................................................................ 35

Outline Dimensions....................................................................... 36

Ordering Guide .......................................................................... 36

REVISION HISTORY

6/12—Revision 0: Initial Version