AD7631 Analog Devices, AD7631 Datasheet - Page 2

• Manufacturer Part Number: AD7631
• Manufacturer: Analog Devices

Specifications of AD7631

• Resolution (bits): 18bit
• # Chan: 1
• Sample Rate: 250kSPS
• Interface: Par,Ser,SPI
• Analog Input Type: Diff-Bip,Usr-Defined Range/Offset
• Ain Range: 10V p-p,20 V p-p,40 V p-p
• Adc Architecture: SAR
• Pkg Type: CSP,QFP

AD7631
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 7
Pin Configuration and Function Descriptions............................. 8
Typical Performance Characteristics ........................................... 12
Terminology .................................................................................... 16
Theory of Operation ...................................................................... 17
REVISION HISTORY
3/11—Rev. 0 to Rev. A
Changes to Resolution Parameter, Table 2 .................................... 3
Changes to Figure 4 and Table 6..................................................... 8
Added Exposed Pad Notation to Outline Dimensions ............. 32
2/07—Revision 0: Initial Version
Timing Specifications .................................................................. 5
ESD Caution.................................................................................. 7
Overview...................................................................................... 17
Converter Operation.................................................................. 17
Transfer Functions...................................................................... 18
Typical Connection Diagram ................................................... 18
Analog Inputs.............................................................................. 19
Rev. A | Page 2 of 32
Interfaces.......................................................................................... 24
Application Information................................................................ 31
Outline Dimensions ....................................................................... 32
Driver Amplifier Choice ........................................................... 20
Voltage Reference Input/Output .............................................. 21
Power Supplies ............................................................................ 22
Conversion Control ................................................................... 23
Digital Interface.......................................................................... 24
Parallel Interface......................................................................... 24
Serial Interface ............................................................................ 25
Master Serial Interface............................................................... 25
Slave Serial Interface .................................................................. 26
Hardware Configuration ........................................................... 29
Software Configuration ............................................................. 29
Microprocessor Interfacing....................................................... 30
Layout Guidelines....................................................................... 31
Evaluating Performance ............................................................ 31
Ordering Guide .......................................................................... 32