AD7276/AD7277/AD7278

Rev. C | Page 2 of 28

TABLE OF CONTENTS

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

 

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

 

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

 

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

 

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

 

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

 

AD7276 Specifications................................................................. 3

 

AD7277 Specifications................................................................. 5

 

AD7278 Specifications................................................................. 7

 

Timing Specifications—AD7276/AD7277/AD7278 ............... 8

 

Timing Examples........................................................................ 10

 

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

 

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

 

Pin Configurations and Function Descriptions ......................... 12

 

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

 

Terminology .................................................................................... 15

 

Theory of Operation ...................................................................... 16

 

Circuit Information.................................................................... 16

 

Converter Operation.................................................................. 16

 

ADC Transfer Function............................................................. 16

 

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

 

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

 

Power vs. Throughput Rate....................................................... 21

 

Serial Interface ................................................................................ 22

 

AD7278 in a 10 SCLK Cycle Serial Interface.......................... 24

 

Microprocessor Interfacing....................................................... 24

 

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

 

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

 

Evaluating Performance.............................................................. 25

 

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

 

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

 

REVISION HISTORY

5/11—Rev. B to Rev. C

Changes to Figure 21...................................................................... 16

Changes to Ordering Guide .......................................................... 27

Changes to Endnote 5 .................................................................... 27

11/09—Rev. A to Rev. B

Changes to Table 2............................................................................ 3

Changes to Table 3............................................................................ 5

Changes to Table 4............................................................................ 7

Changes to Ordering Guide .......................................................... 27

10/05—Rev. 0 to Rev. A

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

Changes to Table 2............................................................................ 3

Changes to Table 5............................................................................ 8

Changes to the Partial Power-Down Mode Section .................. 18

Changes to the Power vs. Throughput Rate Section.................. 21

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

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

7/05—Revision 0: Initial Version