AD7991/AD7995/AD7999

Preliminary Technical Data

Rev.PrB | Page 2 of 25

TABLE OF CONTENTS

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

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

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

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

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

ad7991 Specifications....................................................................... 3

ad7995 Specifications....................................................................... 5

ad7999 Specifications....................................................................... 7

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

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

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

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

Terminology .................................................................................... 14

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

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

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

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

Internal Register Structure ............................................................ 18

Configuration Register .............................................................. 18

SAMPLE DELAY and BIT TRIAL DELAY ............................ 18

Conversion Result Register ....................................................... 19

Serial Interface ................................................................................ 20

Serial Bus Address...................................................................... 20

Writing to the AD7991/AD7995/AD7999.................................. 21

Writing a Single Byte of Data to the Configuration Register 21

reading from the AD7991/AD7995/AD7999 ............................. 22

Placing the AD7991/AD7995/AD7999................................... 23

into High Speed Mode............................................................... 23

Mode of operation.......................................................................... 24

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

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

REVISION HISTORY

PrB/Sept 06—Revision 0: Initial Version