AD7902

Data Sheet

Rev. B | Page 2 of 28

TABLE OF CONTENTS

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

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

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

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

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

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

Timing Specifications .................................................................. 5

Absolute Maximum Ratings............................................................ 6

ESD Caution.................................................................................. 6

Pin Configuration and Function Descriptions............................. 7

Typical Performance Characteristics ............................................. 8

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

Theory of Operation ...................................................................... 14

Circuit Information.................................................................... 14

Converter Operation.................................................................. 14

Typical Connection Diagram ................................................... 15

Analog Inputs ............................................................................. 15

Driver Amplifier Choice ........................................................... 16

Voltage Reference Input ............................................................ 16

Power Supply............................................................................... 17

Digital Interface.......................................................................... 17

CS Mode ...................................................................................... 18

Chain Mode ................................................................................ 22

Applications Information .............................................................. 24

Simultaneous Sampling ............................................................. 24

Functional Saftey Considerations ............................................ 25

Layout............................................................................................... 26

Evaluating Performance of the AD7902.................................. 26

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

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

REVISION HISTORY

8/15—Rev. A to Rev. B

Changed ADA4841-x to ADA4841-1/ADA4841-2 .. Throughout

Change to Absolute Input Voltage Parameter, Table 2 ................ 3

Changes to Voltage Reference Input Section .............................. 16

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

7/14—Rev. 0 to Rev. A

Changed Standby Current Unit from nA to μA ........................... 4

Changes to Power Supply Section ................................................ 17

2/14—Revision 0: Initial Version