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AD7609

8-Channel Differential DAS with 18-Bit, Bipolar, Simultaneous Sampling ADC

Analog Devices 

AD7609

TABLE OF CONTENTS

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

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

Companion Products ....................................................................... 1

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

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

General Description ......................................................................... 3

Specifications..................................................................................... 4

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

Absolute Maximum Ratings.......................................................... 11

Thermal Resistance .................................................................... 11

ESD Caution................................................................................ 11

Pin Configuration and Function Descriptions........................... 12

Typical Performance Characteristics ........................................... 15

Terminology .................................................................................... 19

Theory of Operation ...................................................................... 21

REVISION HISTORY

5/14—Rev. A to Rev. B

Changes to Patent Footnote .............................................................1

Changes to Figure 37.......................................................................22

Changes to Figure 39 and Figure 40..............................................23

2/12—Rev. 0 to Rev. A

Changes to Analog Input Ranges Section ....................................21

7/11—Revision 0: Initial Version

Data Sheet

Converter Details ....................................................................... 21

Analog Input ............................................................................... 21

ADC Transfer Function............................................................. 22

Internal/External Reference...................................................... 23

Typical Connection Diagram ................................................... 24

Power-Down Modes .................................................................. 24

Conversion Control ................................................................... 25

Digital Interface .............................................................................. 26

Parallel Interface (PAR/SER SEL = 0)...................................... 26

Serial Interface (PAR/SER SEL = 1) ......................................... 26

Reading During Conversion..................................................... 27

Digital Filter ................................................................................ 28

Layout Guidelines....................................................................... 32

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

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

Rev. B | Page 2 of 36

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