AD7322 Analog Devices, AD7322 Datasheet - Page 2

• Manufacturer Part Number: AD7322
• Description: Software Selectable True Bipolar Input, 2-Channel, 12-Bit Plus Sign ADC
• Manufacturer: Analog Devices

Specifications of AD7322

• Resolution (bits): 13bit
• # Chan: 2
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Bip,Diff-Uni,SE-Uni
• Ain Range: Bip (Vref),Bip (Vref) x 2,Bip (Vref) x 4,Bip 10V,Bip 2.5V,Bip 5.0V,Uni (Vref) x 4,Uni 10V
• Adc Architecture: SAR
• Pkg Type: SOP

AD7322
TABLE OF CONTENTS
Features .............................................................................................. 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 7
Pin Configuration and Function Descriptions ............................. 8
Typical Performance Characteristics ............................................. 9
Terminology .................................................................................... 13
Theory of Operation ...................................................................... 15
Registers ........................................................................................... 21
REVISION HISTORY
1/10—Rev. 0 to Rev. A
Changes to Power Requirements, Normal Mode (Operational),
I
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
CC
Timing Specifications .................................................................. 6
ESD Caution .................................................................................. 7
Circuit Information .................................................................... 15
Converter Operation .................................................................. 15
Analog Input Structure .............................................................. 16
Typical Connection Diagram ................................................... 18
Analog Input ............................................................................... 18
Driver Amplifier Choice ............................................................ 20
Addressing Registers .................................................................. 21
and I
DRIVE
Parameter; and Power Dissipation, Normal Mode
Rev. A | Page 2 of 36
Sequencer Operation ..................................................................... 25
Modes of Operation ....................................................................... 27
Serial Interface ................................................................................ 30
Microprocessor Interfacing ........................................................... 31
Application Hints ........................................................................... 32
Outline Dimensions ....................................................................... 33
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
Control Register ......................................................................... 22
Range Register ............................................................................ 24
Reference ..................................................................................... 26
V
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
AD7322 to ADSP-21xx .............................................................. 31
AD7322 to ADSP-BF53x ........................................................... 31
Layout and Grounding .............................................................. 32
Power Supply Configuration .................................................... 32
Ordering Guide .......................................................................... 33
DRIVE
............................................................................................ 26