Datasheet

AD7980 Data Sheet
Rev. C | Page 2 of 28
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Application Diagram Example........................................................ 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Timing Specifications ....................................................................... 5
Absolute Maximum Ratings ............................................................ 6
ESD Caution .................................................................................. 6
Pin Configurations and Function Descriptions ........................... 7
Terminology ...................................................................................... 8
Typical Performance Characteristics ............................................. 9
Theory of Operation ...................................................................... 13
Circuit Information .................................................................... 13
Converter Operation .................................................................. 13
Typical Connection Diagram ................................................... 14
Analog Input ............................................................................... 15
Driver Amplifier Choice ........................................................... 15
Voltage Reference Input ............................................................ 16
Power Supply ............................................................................... 16
Digital Interface .......................................................................... 16
CS
Mode, 3-Wire, Without Busy Indicator ............................ 17
CS
Mode 3-Wire with Busy Indicator ..................................... 18
CS
Mode 4-Wire, Without Busy Indicator ............................. 19
CS
Mode 4-Wire with Busy Indicator ..................................... 20
Chain Mode, Without Busy Indicator ..................................... 21
Chain Mode with Busy Indicator ............................................. 22
Application Hints ........................................................................... 23
Layout .......................................................................................... 23
Evaluating the Performance of the AD7980 ............................... 23
Outline Dimensions ....................................................................... 24
Ordering Guide .......................................................................... 25
REVISION HISTORY
8/13—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
6/09—Rev. A to Rev. B
Changes to Table 5 ............................................................................ 6
Changes to Figure 25 ...................................................................... 13
Updated Outline Dimensions ....................................................... 24
Changes to Ordering Guide .......................................................... 25
9/08—Rev. 0 to Rev. A
Delete QFN Endnote ..................................................... Throughout
Changes to Ordering Guide .......................................................... 24
8/07—Revision 0: Initial Version