AD7980

Data Sheet

Rev. F | Page 2 of 26

TABLE OF CONTENTS

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

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

Typical Application Circuit ............................................................. 1

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

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

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

Timing Specifications .................................................................. 5

Absolute Maximum Ratings............................................................ 7

ESD Caution.................................................................................. 7

Pin Configurations and Function Descriptions ........................... 8

Terminology ...................................................................................... 9

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

Theory of Operation ...................................................................... 14

Circuit Information.................................................................... 14

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

Typical Application Circuit with Multiple Supplies............... 15

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

Driver Amplifier Choice ........................................................... 16

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

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

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

3-Wire CS Mode Without Busy Indicator .............................. 18

3-Wire CS Mode with Busy Indicator ..................................... 19

4-Wire CS Mode Without Busy Indicator .............................. 20

4-Wire CS Mode with Busy Indicator ..................................... 21

Chain Mode Without Busy Indicator ...................................... 22

Chain Mode with Busy Indicator............................................. 23

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

Layout .......................................................................................... 24

Evaluating the Performance of the AD7980 .............................. 24

Outline Dimensions....................................................................... 25

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

REVISION HISTORY

10/2017—Rev. E to Rev. F

Changes to Table 1............................................................................ 1

Changes to Figure 5.......................................................................... 8

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

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

7/2016—Rev. D to Rev. E

Changed VIO = 2.3 V to 5.5 V to VIO = 1.71 V to

5.5 V.................................................................................Throughout

Change to Features Section ............................................................. 1

Changes to Conversion Rate Parameter, Table 2.......................... 3

Changes to VIO Parameter, Table 3 ............................................... 4

Deleted VIO Range Parameter, Table 3 ......................................... 4

Added Table 5; Renumbered Sequentially .................................... 6

Changes to Table 7............................................................................ 8

Changes to Table 9.......................................................................... 16

Changes to Voltage Reference Input Section .............................. 17

Changes to Figure 32...................................................................... 18

Changes to Figure 34...................................................................... 19

Changes to Figure 36...................................................................... 20

Changes to Figure 38...................................................................... 21

Changes to Figure 40...................................................................... 22

Changes to Figure 42...................................................................... 23

7/2014—Rev. C to Rev. D

Changed QFN (LFCSP) to LFCSP .............................. Throughout

Changes to Features Section and Table 1 ...................................... 1

Added Patent Note, Note 1.............................................................. 1

Changes to AC Accuracy Parameter, Table 2 ................................3

Change to Standby Current Parameter, Table 3 ............................4

Changes to Figure 25...................................................................... 13

Changes to Table 8.......................................................................... 15

Changes to Power Supply Section ................................................ 16

8/2013—Rev. B to Rev. C

Change to Features Section..............................................................1

Changes to Table 3.............................................................................4

Change to Figure 5 ............................................................................7

Added EPAD Row, Table 6...............................................................7

Changes to Evaluating the Performance of the

AD7980 Section.............................................................................. 23

Updated Outline Dimensions....................................................... 24

Changes to Ordering Guide.......................................................... 25

6/2009—Rev. A to Rev. B

Changes to Table 5.............................................................................6

Changes to Figure 25...................................................................... 13

Updated Outline Dimensions....................................................... 24

Changes to Ordering Guide.......................................................... 25

9/2008—Rev. 0 to Rev. A

Deleted QFN Endnote .................................................. Throughout

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

8/2007—Revision 0: Initial Version