AD7321

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TABLE OF CONTENTS

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

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

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

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

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

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

Timing Specifications .................................................................. 7

Absolute Maximum Ratings............................................................ 8

ESD Caution.................................................................................. 8

Pin Configuration and Function Descriptions............................. 9

Typical Performance Characteristics ........................................... 10

Terminology .................................................................................... 14

Theory of Operation ...................................................................... 16

Circuit Information.................................................................... 16

Converter Operation.................................................................. 16

Analog Input Structure.............................................................. 17

Typical Connection Diagram ................................................... 19

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

Driver Amplifier Choice............................................................ 21

Registers ........................................................................................... 22

Addressing Registers.................................................................. 22

Control Register ......................................................................... 23

Range Register ............................................................................ 25

Sequencer Operation ..................................................................... 26

Reference ..................................................................................... 27

VDRIVE............................................................................................ 27

Modes of Operation ....................................................................... 28

Normal Mode.............................................................................. 28

Full Shutdown Mode.................................................................. 28

Auto Shutdown Mode................................................................ 29

Autostandby Mode..................................................................... 29

Power vs. Throughput Rate....................................................... 30

Serial Interface ................................................................................ 31

Microprocessor Interfacing........................................................... 32

AD7321 to ADSP-21xx.............................................................. 32

AD7321 to ADSP-BF53x ........................................................... 32

Application Hints ........................................................................... 33

Layout and Grounding .............................................................. 33

Outline Dimensions ....................................................................... 34

Ordering Guide .......................................................................... 34

REVISION HISTORY

1/06—Revision 0: Initial Version