AD7910/AD7920

Rev. C | Page 2 of 24

TABLE OF CONTENTS

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

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

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

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

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

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

AD7910 .......................................................................................... 3

AD7920 .......................................................................................... 4

Timing Specifications .................................................................. 6

Timing Examples .............................................................................. 7

Timing Example 1 ........................................................................ 7

Timing Example 2 ........................................................................ 7

Absolute Maximum Ratings............................................................ 8

ESD Caution.................................................................................. 8

Pin Configurations and Function Descriptions ........................... 9

Typical Performance Characteristics ........................................... 10

Terminology .................................................................................... 12

Circuit Information ........................................................................ 13

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

ADC Transfer Function............................................................. 14

Typical Connection Diagram ................................................... 14

Analog Input ............................................................................... 15

Digital Inputs .............................................................................. 15

Modes of Operation ....................................................................... 16

Normal Mode.............................................................................. 16

Power-Down Mode .................................................................... 16

Power-Up Time .......................................................................... 16

Power vs. Throughput Rate........................................................... 18

Serial Interface ................................................................................ 19

Microprocessor Interfacing........................................................... 20

AD7910/AD7920 to TMS320C541 Interface ......................... 20

AD7910/AD7920 to ADSP-218x.............................................. 20

AD7910/AD7920 to DSP563xx Interface ............................... 21

Application Hints ........................................................................... 22

Grounding and Layout .............................................................. 22

Evaluating Performance ............................................................ 22

Outline Dimensions ....................................................................... 23

Ordering Guide .......................................................................... 24

REVISION HISTORY

9/05—Rev. B to Rev. C

Updated Formatting ..........................................................Universal

Updated Outline Dimensions....................................................... 23

Changes to Ordering Guide.......................................................... 24

3/04—Rev. A to Rev. B

Added U.S. Patent Number ............................................................ 1

Changes to Note 5 ............................................................................ 2

Changes to Note 6 of AD7920 Specifications............................... 4

Changes to Note 1 of Timing Specifications ................................ 4

Changes to Absolute Maximum Ratings ...................................... 6

Changes to Ordering Guide............................................................ 6

8/03—Rev. 0 to Rev. A

Changes to Ordering Guide.............................................................6

Changes to Evaluating the AD7910/AD7920 Performance

Section.............................................................................................. 18

Updated Outline Dimensions ...................................................... 19