AD7322

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 .................................................................. 6

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

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

Pin Configuration and Function Descriptions............................. 8

Typical Performance Characteristics ............................................. 9

Terminology .................................................................................... 13

Theory of Operation ...................................................................... 15

Circuit Information.................................................................... 15

Converter Operation.................................................................. 15

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

Typical Connection Diagram ................................................... 18

Analog Input ............................................................................... 18

Driver Amplifier Choice............................................................ 20

Registers........................................................................................... 21

Addressing Registers.................................................................. 21

Control Register ......................................................................... 22

Range Register ............................................................................ 24

Sequencer Operation ..................................................................... 25

Reference ..................................................................................... 26

VDRIVE............................................................................................ 26

Modes of Operation ....................................................................... 27

Normal Mode (PM1 = PM0 = 0) ............................................. 27

Full Shutdown Mode (PM1 = PM0 = 1) ................................. 27

Autoshutdown Mode (PM1 = 1, PM0 = 0)............................. 28

Autostandby Mode (PM1 = 0, PM0 = 1) ................................ 28

Power vs. Throughput Rate....................................................... 29

Serial Interface ................................................................................ 30

Microprocessor Interfacing........................................................... 31

AD7322 to ADSP-21xx.............................................................. 31

AD7322 to ADSP-BF53x........................................................... 31

Application Hints ........................................................................... 32

Layout and Grounding .............................................................. 32

Power Supply Configuration .................................................... 32

Outline Dimensions....................................................................... 33

Ordering Guide .......................................................................... 33

REVISION HISTORY

12/13—Rev. A to Rev. B

Changes to Circuit Information Section and Table 6 ................ 15

Changes to Addressing Registers Section.................................... 21

Changes to Power Supply Configuration Section ...................... 32

1/10—Rev. 0 to Rev. A

Changes to Power Requirements, Normal Mode (Operational),

Parameter, Table 2............................................................................. 5

Changes to Endnote 1, Table 4........................................................ 7

Changes to Table 6.......................................................................... 15

Changes to Figure 25 and Figure 26............................................. 16

Changes to Figure 30 and Figure 31............................................. 17

Changes to Figure 33 and Figure 34............................................. 18

Changes to Figure 39...................................................................... 19

Changes to Figure 40 and Figure 41............................................. 20

Changes to Autostandby Mode (PM1 = 0, PM = 1) Section .... 28

Changes to Table 14 and Table 15 ................................................ 31

Added Power Supply Configuration Section.............................. 32

Added Table 16; Renumbered Sequentially ................................ 32

Added Figure 53; Renumbered Sequentially .............................. 32

Updated Outline Dimensions....................................................... 33

12/05—Revision 0: Initial Version