AD7321 Analog Devices, AD7321 Datasheet - Page 2

• Manufacturer Part Number: AD7321
• Description: 500 kSPS, 2-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC
• Manufacturer: Analog Devices

Specifications of AD7321

• Resolution (bits): 13bit
• # Chan: 2
• Sample Rate: 500kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: Bip 10V,Bip 2.5V,Bip 5.0V,Uni 10V
• Adc Architecture: SAR
• Pkg Type: SOP

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