Datasheet

AD9645 Data Sheet
Rev. 0 | Page 2 of 36
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
DC Specifications ......................................................................... 3
AC Specifications .......................................................................... 4
Digital Specifications ................................................................... 5
Switching Specifications .............................................................. 6
Timing Specifications .................................................................. 6
Absolute Maximum Ratings .......................................................... 10
Thermal Resistance .................................................................... 10
ESD Caution ................................................................................ 10
Pin Configuration and Function Descriptions ........................... 11
Typical Performance Characteristics ........................................... 12
AD9645-80 .................................................................................. 12
AD9645-125 ................................................................................ 15
Equivalent Circuits ......................................................................... 18
Theory of Operation ...................................................................... 19
Analog Input Considerations .................................................... 19
Voltage Reference ....................................................................... 20
Clock Input Considerations ...................................................... 21
Power Dissipation and Power-Down Mode ........................... 22
Digital Outputs and Timing ..................................................... 23
Output Test Modes ..................................................................... 26
Serial Port Interface (SPI) .............................................................. 27
Configuration Using the SPI ..................................................... 27
Hardware Interface ..................................................................... 28
Configuration Without the SPI ................................................ 28
SPI Accessible Features .............................................................. 28
Memory Map .................................................................................. 29
Reading the Memory Map Register Table ............................... 29
Memory Map Register Table ..................................................... 30
Memory Map Register Descriptions ........................................ 33
Applications Information .............................................................. 35
Design Guidelines ...................................................................... 35
Power and Ground Guidelines ................................................. 35
Exposed Pad Thermal Heat Slug Recommendations ............ 35
VCM ............................................................................................. 35
Reference Decoupling ................................................................ 35
SPI Port ........................................................................................ 35
Outline Dimensions ....................................................................... 36
Ordering Guide .......................................................................... 36
REVISION HISTORY
6/12—Revision 0: Initial Version