AD7643

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TABLE OF CONTENTS

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

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

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

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

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

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

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

Timing Specifications....................................................................... 5

Absolute Maximum Ratings............................................................ 7

ESD Caution.................................................................................. 7

Pin Configuration and Function Descriptions............................. 8

Terminology .................................................................................... 11

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

Applications Information .............................................................. 15

Circuit Information.................................................................... 15

Converter Operation.................................................................. 15

Transfer Functions...................................................................... 16

Typical Connection Diagram........................................................ 17

Analog Inputs.............................................................................. 17

Multiplexed Inputs ..................................................................... 17

Driver Amplifier Choice ........................................................... 18

Voltage Reference Input ............................................................ 18

Power Supply............................................................................... 20

Conversion Control ................................................................... 20

Interfaces.......................................................................................... 21

Digital Interface.......................................................................... 21

Parallel Interface......................................................................... 21

Serial interface ............................................................................ 22

Master Serial Interface............................................................... 22

Slave Serial Interface .................................................................. 24

Microprocessor Interfacing....................................................... 26

Application Hints ........................................................................... 27

Layout .......................................................................................... 27

Evaluating the AD7643 Performance ...................................... 27

Outline Dimensions ....................................................................... 28

Ordering Guide .......................................................................... 28

REVISION HISTORY

4/06—Revision 0: Initial Version