AD7476A/AD7477A/AD7478A

Rev. F | 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

AD7476A Specifications.............................................................. 3

AD7477A Specifications.............................................................. 5

AD7478A Specifications.............................................................. 6

Timing Specifications .................................................................. 8

Absolute Maximum Ratings.......................................................... 10

ESD Caution................................................................................ 10

Pin Configurations and Function Descriptions ......................... 11

Typical Performance Characteristics ........................................... 12

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

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

Circuit Information.................................................................... 15

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

ADC Transfer Function............................................................. 15

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

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

Digital Inputs .............................................................................. 17

Modes of Operation ....................................................................... 18

Normal Mode.............................................................................. 18

Power-Down Mode.................................................................... 18

Power-Up Time .......................................................................... 18

Power vs. Throughput Rate........................................................... 20

Serial Interface ................................................................................ 21

AD7478A in a 12 SCLK Cycle Serial Interface....................... 22

Microprocessor Interfacing........................................................... 23

AD7476A/AD7477A/AD7478A to TMS320C541 Interface 23

AD7476A/AD7477A/AD7478A to ADSP-218x Interface.... 23

AD7476A/AD7477A/AD7478A to DSP563xx Interface...... 24

Application Hints ........................................................................... 25

Grounding and Layout .............................................................. 25

Evaluating the AD7476A/AD7477A Performance............... 25

Outline Dimensions....................................................................... 26

Ordering Guide .......................................................................... 26

Automotive Products................................................................. 27

REVISION HISTORY

1/11—Rev. E to Rev. F

Changes to Features Section............................................................ 1

Changes to Ordering Guide .......................................................... 26

Added Automotive Products Section .......................................... 27

2/09—Rev. D to Rev. E

Changes to Features.......................................................................... 1

Changes to Ordering Guide .......................................................... 26

4/06—Rev. C to Rev. D

Updated Format..................................................................Universal

Changes to Ordering Guide .......................................................... 26