AD7991/AD7995/AD7999

Rev. 0 | Page 2 of 28

TABLE OF CONTENTS

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

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

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

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

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

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

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

AD7991 .......................................................................................... 3

AD7995 .......................................................................................... 5

AD7999 .......................................................................................... 7

I2C Timing Specifications............................................................ 9

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

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

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

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

Terminology .................................................................................... 16

Theory of Operation ...................................................................... 17

Converter Operation.................................................................. 17

Typical Connection Diagram ................................................... 18

Analog Input ............................................................................... 18

Internal Register Structure ............................................................ 20

Configuration Register .............................................................. 20

Sample Delay and Bit Trial Delay............................................. 21

Conversion Result Register ....................................................... 21

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

Serial Bus Address...................................................................... 22

Writing to the AD7991/AD7995/AD7999.................................. 23

Reading from the AD7991/AD7995/AD7999............................ 24

Placing the AD7991/AD7995/AD7999

into High Speed Mode............................................................... 25

Mode of Operation......................................................................... 26

Outline Dimensions ....................................................................... 27

Ordering Guide .......................................................................... 27

REVISION HISTORY

12/07—Revision 0: Initial Version