AD9640SLASHPCB datasheet(2/41 Pages) AD

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AD9640

Preliminary Technical Data

Rev. PrD | Page 2 of 41

TABLE OF CONTENTS

General Description ......................................................................... 4

Product Highlights ....................................................................... 4

Specifications..................................................................................... 5

ADC DC Specifications ............................................................... 5

ADC AC Specifications ............................................................... 6

Digital specifications.................................................................... 7

switching specifications ............................................................... 8

Absolute Maximum Ratings............................................................ 9

Thermal Characteristics .............................................................. 9

ESD Caution.................................................................................. 9

Pin Configuration and Function Descriptions........................... 10

Equivalent circuits .......................................................................... 13

Typical Performance Characteristics ........................................... 14

Timing Diagrams............................................................................ 15

Terminology .................................................................................... 16

Theory of Operation ...................................................................... 17

ADC Architecture ...................................................................... 17

Analog Input Considerations.................................................... 17

Voltage Reference ....................................................................... 19

Clock Input Considerations ...................................................... 20

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

Digital Outputs ........................................................................... 22

Timing.......................................................................................... 23

ADC OVERRANGE and GaIN control ...................................... 24

Fast detect overview ................................................................... 24

ADC Fast Magnitude ................................................................. 24

ADC overrange (OVR).............................................................. 25

Gain Switching............................................................................ 25

SIGNAL Monitor............................................................................ 27

Peak Detector Mode (Mode Bits 01) ....................................... 27

RMS/MS Magnitude Mode (Mode Bits 00)............................ 27

Threshold Crossing Mode (Mode Bits 1x).............................. 28

Additional Control Bits ............................................................. 28

DC Correction ............................................................................ 29

Signal monitor SPORT OUTPUT............................................ 29

Built-In Self-Test (BIST) and Output test ................................... 30

Built in self test (BIST)............................................................... 30

output test modes ....................................................................... 30

Channel/Chip Synchronization.................................................... 31

Serial Port Interface (SPI).............................................................. 32

Configuration Using the SPI..................................................... 32

Hardware Interface..................................................................... 32

Configuration WITHOUT the SPI.......................................... 33

Memory Map .............................................................................. 33

SPI Accessible Features.............................................................. 33

External memory MaP................................................................... 35

memory map register description............................................ 38

Applications..................................................................................... 39

Design Guidelines ...................................................................... 39

AD9640 Evaluation Board and Software..................................... 40

Outline Dimensions ....................................................................... 41

Ordering Guide .......................................................................... 41

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