AD7922 Analog Devices, AD7922 Datasheet - Page 2

• Manufacturer Part Number: AD7922
• Description: 2-Channel, 2.35 V to 5.25 V, 1 MSPS, 12-Bit A/D Converter
• Manufacturer: Analog Devices

Specifications of AD7922

• Resolution (bits): 12bit
• # Chan: 2
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni Vdd
• Adc Architecture: SAR
• Pkg Type: SOP,SOT

AD7912/AD7922
TABLE OF CONTENTS
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 9
Pin Configurations and Function Descriptions ......................... 10
Terminology .................................................................................... 11
Typical Performance Characteristics ........................................... 13
Circuit Information ........................................................................ 15
REVISION HISTORY
Revision 0: Initial Version
AD7912 Specifications................................................................. 3
AD7922 Specifications................................................................. 5
Timing Specifications .................................................................. 7
Timing Diagrams.......................................................................... 7
Timing Examples.......................................................................... 8
ESD Caution.................................................................................. 9
Converter Operation.................................................................. 15
ADC Transfer Function............................................................. 15
Typical Connection Diagram ................................................... 16
Analog Input ............................................................................... 16
Digital Inputs .............................................................................. 17
Rev. 0 | Page 2 of 32
Modes of Operation ....................................................................... 18
Power vs. Throughput Rate ........................................................... 24
Serial Interface ................................................................................ 25
Application Hints ........................................................................... 28
Evaluating AD7912/AD7922 Performance................................. 29
Outline Dimensions ....................................................................... 30
DIN Input.................................................................................... 17
DOUT Output ............................................................................ 17
Normal Mode.............................................................................. 18
Power-Down Mode.................................................................... 18
Power-Up Time .......................................................................... 20
Daisy-Chain Mode ..................................................................... 20
Daisy-Chain Example ................................................................ 22
Microprocessor Interfacing....................................................... 26
Grounding and Layout .............................................................. 28
Ordering Guide .......................................................................... 30