AD6644

Rev. D | Page 2 of 24

TABLE OF CONTENTS

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

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

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

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

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

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

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

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

Digital Specifications ................................................................... 4

Switching Specifications .............................................................. 4

AC Specifications.......................................................................... 5

Timing Diagram ........................................................................... 6

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

Explanation of Test Levels............................................................7

Thermal Resistance .......................................................................7

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

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

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

Equivalent Circuits......................................................................... 12

Terminology .................................................................................... 13

Theory of Operation ...................................................................... 15

Applying the AD6644 ................................................................ 15

Evaluation Board ............................................................................ 18

Outline Dimensions ....................................................................... 21

Ordering Guide .......................................................................... 21

REVISION HISTORY

8/07—Rev. C to Rev. D

Changes to Table 5............................................................................ 5

Changes to Noise (for Any Range Within the ADC) Definition .. 13

Added Table 8.................................................................................. 16

Changes to Evaluation Board Section.......................................... 18

Changes to Ordering Guide .......................................................... 21

5/03—Data Sheet changed from Rev. B to Rev. C

Updated Outline Dimensions ....................................................... 19

3/03—Data Sheet changed from Rev. A to Rev. B

Change to Digital Specifications Note ........................................... 2

3/03—Data Sheet changed from Rev. 0 to Rev. A

Edits to Specifications ...................................................................... 2

Renumbering of Figures and TPCs ..................................Universal

Updated Outline Dimensions ....................................................... 19