Datasheet
AD7321 Data Sheet
Rev. B | Page 2 of 36
TABLE OF CONTENTS
Features .............................................................................................. 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Timing Specifications .................................................................. 7
Absolute Maximum Ratings ............................................................ 8
ESD Caution .................................................................................. 8
Pin Configuration and Function Descriptions ............................. 9
Typical Performance Characteristics ........................................... 10
Terminology .................................................................................... 14
Theory of Operation ...................................................................... 16
Circuit Information .................................................................... 16
Converter Operation .................................................................. 16
Analog Input Structure .............................................................. 17
Typical Connection Diagram ................................................... 19
Analog Input ............................................................................... 19
Driver Amplifier Choice ............................................................ 21
Registers ........................................................................................... 22
Addressing Registers .................................................................. 22
Control Register ......................................................................... 23
Range Register ............................................................................ 25
Sequencer Operation ..................................................................... 26
Reference ..................................................................................... 27
V
DRIVE
............................................................................................ 27
Modes of Operation ....................................................................... 28
Normal Mode .............................................................................. 28
Full Shutdown Mode .................................................................. 28
Autoshutdown Mode ................................................................. 29
Autostandby Mode ..................................................................... 29
Power vs. Throughput Rate ....................................................... 30
Serial Interface ................................................................................ 31
Microprocessor Interfacing ........................................................... 32
AD7321 to ADSP-21xx .............................................................. 32
AD7321 to ADSP-BF53x ........................................................... 32
Application Hints ........................................................................... 33
Layout and Grounding .............................................................. 33
Power Supply Configuration .................................................... 33
Outline Dimensions ....................................................................... 34
Ordering Guide .......................................................................... 34
REVISION HISTORY
12/13—Rev. A to Rev. B
Changes to Circuit Information Section and Table 6 ................ 16
Changes to Addressing Registers Section .................................... 22
Changes to Power Supply Configuration Section ...................... 33
10/09—Rev. 0 to Rev. A
Changes to Table 2 ............................................................................ 4
Changes to Figure 53 ...................................................................... 33
Changes to Power Supply Configuration Section ...................... 33
Changes to Table 16 ........................................................................ 33
Changes to Outline Dimensions ................................................... 34
Changes to Ordering Guide .......................................................... 34
1/06—Revision 0: Initial Version