Datasheet

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
V
DRIVE
............................................................................................ 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),
I
CC
and I
DRIVE
Parameter; and Power Dissipation, Normal Mode
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