AD7911/AD7921

Rev. A | Page 2 of 28

TABLE OF CONTENTS

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

AD7911 Specifications................................................................. 3

AD7921 Specifications................................................................. 5

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

Timing Diagrams.......................................................................... 7

Timing Examples.......................................................................... 8

Absolute Maximum Ratings............................................................ 9

ESD Caution.................................................................................. 9

Pin Configurations and Function Descriptions ......................... 10

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

Typical Performance Characteristics ........................................... 13

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

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

ADC Transfer Function............................................................. 15

Typical Connection Diagram ................................................... 16

Analog Input ............................................................................... 16

Digital Inputs .............................................................................. 17

DIN Input.................................................................................... 17

DOUT Output ............................................................................ 17

Modes of Operation ....................................................................... 18

Normal Mode.............................................................................. 18

Power-Down Mode .................................................................... 18

Power-Up Time .......................................................................... 19

Power vs. Throughput Rate....................................................... 20

Serial Interface ................................................................................ 21

Microprocessor Interfacing....................................................... 22

Application Hints ........................................................................... 24

Grounding and Layout .............................................................. 24

Outline Dimensions ....................................................................... 25

Ordering Guide .......................................................................... 25

REVISION HISTORY

5/11—Rev. 0 to Rev. A

Updated Outline Dimensions ....................................................... 25

Changes to Ordering Guide .......................................................... 25

4/04—Revision 0: Initial Version