AD7903

Data Sheet

Rev. A | 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

 

Single-to-Differential Driver .................................................... 16

 

Voltage Reference Input ............................................................ 17

 

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

 

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

 

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

 

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

 

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

 

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

 

Functional Safety Considerations ............................................ 25

 

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

 

Evaluating Performance of the AD7903.................................. 26

 

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

 

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

 

REVISION HISTORY

1/14—Rev. 0 to Rev. A

Change to Gain Error Temperature Drift Parameter .................. 3

Changes to Figure 12........................................................................ 9

Changes to Figure 17 and Figure 20............................................. 10

Changes to Figure 28...................................................................... 11

12/13—Revision 0: Initial Version