AD9643

Rev. A | Page 2 of 36

TABLE OF CONTENTS

Features .............................................................................................. 1

 

Applications....................................................................................... 1

 

Functional Block Diagram .............................................................. 1

 

General Description ......................................................................... 1

 

Product Highlights ........................................................................... 1

 

Revision History ............................................................................... 2

 

Specifications..................................................................................... 3

 

ADC DC Specifications ............................................................... 3

 

ADC AC Specifications ............................................................... 4

 

Digital Specifications ................................................................... 6

 

Switching Specifications .............................................................. 8

 

Timing Specifications .................................................................. 9

 

Absolute Maximum Ratings.......................................................... 11

 

Thermal Characteristics ............................................................ 11

 

ESD Caution................................................................................ 11

 

Pin Configurations and Function Descriptions ......................... 12

 

Typical Performance Characteristics ........................................... 16

 

Equivalent Circuits ......................................................................... 22

 

Theory of Operation ...................................................................... 23

 

ADC Architecture ...................................................................... 23

 

Analog Input Considerations ................................................... 23

 

Voltage Reference ....................................................................... 25

 

Clock Input Considerations...................................................... 25

 

Power Dissipation and Standby Mode .................................... 26

 

Digital Outputs ........................................................................... 27

 

Channel/Chip Synchronization.................................................... 28

 

Serial Port Interface (SPI).............................................................. 29

 

Configuration Using the SPI..................................................... 29

 

Hardware Interface..................................................................... 29

 

SPI Accessible Features.............................................................. 30

 

Memory Map .................................................................................. 31

 

Reading the Memory Map Register Table............................... 31

 

Memory Map Register Table..................................................... 32

 

Memory Map Register Description ......................................... 34

 

Applications Information .............................................................. 35

 

Design Guidelines ...................................................................... 35

 

Outline Dimensions ....................................................................... 36

 

Ordering Guide .......................................................................... 36

 

REVISION HISTORY

5/11—Rev. 0 to Rev. A

Changes to Table 2, Worst Other (Harmonic or Spur)

Max Values......................................................................................... 4

4/11—Revision 0: Initial Version