AD7986

Rev. B | Page 2 of 28

TABLE OF CONTENTS

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

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

Application Diagram........................................................................ 1

General Description ......................................................................... 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 ............................................. 9

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

Theory of Operation ...................................................................... 13

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

Converter Operation.................................................................. 13

Conversion Modes of Operation.............................................. 13

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

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

Driver Amplifier Choice ........................................................... 15

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

Power Supply............................................................................... 16

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

Data Reading Options ............................................................... 18

CS Mode, 3-Wire Without Busy Indicator ............................. 19

CS Mode, 3-Wire with Busy Indicator .................................... 20

CS Mode, 4-Wire Without Busy Indicator ............................. 21

CS Mode, 4-Wire with Busy Indicator .................................... 22

Chain Mode Without Busy Indicator ...................................... 23

Chain Mode with Busy Indicator............................................. 24

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

Layout .......................................................................................... 25

Evaluating the AD7986 Performance ...................................... 25

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

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

REVISION HISTORY

3/11—Rev. A to Rev. B

Added Common-Mode Input Range Parameter, Table 2 ........... 3

8/10—Rev. 0 to Rev. A

Changes to Conversion Time: CNV Rising Edge to Data

Available (Turbo Mode/Normal Mode) Parameter, Table 4....... 5

Changes to Figure 32...................................................................... 22

4/09—Revision 0: Initial Version