AD7689

Preliminary Technical Data

Rev. PrC | Page 2 of 20

TABLE OF CONTENTS

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

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

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

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

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

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

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

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

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

Pin Configurations and Function Descriptions ........................... 8

Typical Performance Characteristics ............................................. 9

Terminology .................................................................................... 10

Theory of Operation ...................................................................... 11

Overview...................................................................................... 11

Converter Operation.................................................................. 11

Transfer Functions...................................................................... 12

Typical Connection Diagram ................................................... 12

Configuration Register, CFG .................................................... 13

Analog Inputs ............................................................................. 13

Driver Amplifier Choice ........................................................... 14

Voltage Reference Output/Input .............................................. 15

Power Supply............................................................................... 16

Supplying the ADC from the Reference.................................. 16

Digital Interface.......................................................................... 16

Without Busy Indicator ............................................................. 17

With Busy Indicator................................................................... 18

Application Hints ........................................................................... 19

Layout .......................................................................................... 19

Evaluating AD7689 Performance............................................. 19

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

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

REVISION HISTORY