AD6643

Rev. 0 | Page 2 of 36

TABLE OF CONTENTS

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

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

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

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

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

Product Highlights ........................................................................... 3

Specifications..................................................................................... 4

ADC DC Specifications................................................................. 4

ADC AC Specifications ................................................................. 5

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

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

Timing Specifications .................................................................. 8

Absolute Maximum Ratings.......................................................... 10

Thermal Characteristics ............................................................ 10

ESD Caution................................................................................ 10

Pin Configurations and Function Descriptions ......................... 11

Typical Performance Characteristics ........................................... 15

Equivalent Circuits ......................................................................... 18

Theory of Operation ...................................................................... 19

ADC Architecture ...................................................................... 19

Analog Input Considerations.................................................... 19

Voltage Reference ....................................................................... 21

Clock Input Considerations...................................................... 21

Power Dissipation and Standby Mode .................................... 22

Digital Outputs ........................................................................... 23

Noise Shaping Requantizer (NSR) ............................................... 24

22% BW Mode (>40 MHz at 184.32 MSPS)........................... 24

33% BW Mode (>60 MHz at 184.32 MSPS)........................... 25

Channel/Chip Synchronization.................................................... 26

Serial Port Interface (SPI).............................................................. 27

Configuration Using the SPI..................................................... 27

Hardware Interface..................................................................... 27

SPI Accessible Features.............................................................. 28

Memory Map .................................................................................. 29

Reading the Memory Map Register Table............................... 29

Memory Map Register Table..................................................... 30

Memory Map Register Description ......................................... 32

Applications Information .............................................................. 34

Design Guidelines ...................................................................... 34

Outline Dimensions ....................................................................... 35

Ordering Guide .......................................................................... 35

REVISION HISTORY

4/11—Revision 0: Initial Version