Datasheet

AD9640
Rev. B | Page 2 of 52
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 3
General Description ......................................................................... 4
Specifications ..................................................................................... 5
ADC DC Specifications—AD9640ABCPZ-80,
AD9640BCPZ-80, AD9640ABCPZ-105, and
AD9640BCPZ-105 ......................................................................... 5
ADC DC Specifications—AD9640ABCPZ-125,
AD9640BCPZ-125, AD9640ABCPZ-150, and
AD9640BCPZ-150 ......................................................................... 6
ADC AC Specifications—AD9640ABCPZ-80,
AD9640BCPZ-80, AD9640ABCPZ-105, and
AD9640BCPZ-105 ......................................................................... 7
ADC AC Specifications—AD9640ABCPZ-125,
AD9640BCPZ-125, AD9640ABCPZ-150, and
AD9640BCPZ 150 ......................................................................... 8
Digital Specifications ................................................................... 9
Switching Specifications—AD9640ABCPZ-80,
AD9640BCPZ-80, AD9640ABCPZ-105, and
AD9640BCPZ-105 ..................................................................... 10
Switching Specifications—AD9640ABCPZ-125,
AD9640BCPZ-125, AD9640ABCPZ-150, and
AD9640BCPZ-150 ..................................................................... 11
Timing Specifications ................................................................ 12
Absolute Maximum Ratings .......................................................... 14
Thermal Characteristics ............................................................ 14
ESD Caution ................................................................................ 14
Pin Configurations and Function Descriptions ......................... 15
Equivalent Circuits ......................................................................... 19
Typical Performance Characteristics ........................................... 20
Theory of Operation ...................................................................... 25
ADC Architecture ...................................................................... 25
Analog Input Considerations .................................................... 25
Voltage Reference ....................................................................... 27
Clock Input Considerations ...................................................... 28
Power Dissipation and Standby Mode .................................... 30
Digital Outputs ........................................................................... 31
Timing ......................................................................................... 31
ADC Overrange and Gain Control .............................................. 32
Fast Detect Overview ................................................................. 32
ADC Fast Magnitude ................................................................. 32
ADC Overrange (OR) ................................................................ 33
Gain Switching ............................................................................ 33
Signal Monitor ................................................................................ 35
Peak Detector Mode................................................................... 35
RMS/MS Magnitude Mode ......................................................... 35
Threshold Crossing Mode ......................................................... 36
Additional Control Bits ............................................................. 36
DC Correction ............................................................................ 36
Signal Monitor SPORT Output ................................................ 37
Built-In Self-Test (BIST) and Output Test .................................. 38
Built-In Self-Test (BIST) ............................................................ 38
Output Test Modes ..................................................................... 38
Channel/Chip Synchronization .................................................... 39
Serial Port Interface (SPI) .............................................................. 40
Configuration Using the SPI ..................................................... 40
Hardware Interface ..................................................................... 40
Configuration Without the SPI ................................................ 41
SPI Accessible Features .............................................................. 41
Memory Map .................................................................................. 42
Reading the Memory Map Table .............................................. 42
External Memory Map .............................................................. 43
Memory Map Register Description ......................................... 46
Applications Information .............................................................. 49
Design Guidelines ...................................................................... 49
Outline Dimensions ....................................................................... 50
Ordering Guide .......................................................................... 51