AD9627 datasheet(3/77 Pages) AD

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AD9627

Rev. B | Page 2 of 76

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—AD9627-80/AD9627-105 .................. 5

ADC DC Specifications—AD9627-125/AD9627-150 ................ 6

ADC AC Specifications—AD9627-80/AD9627-105................... 7

ADC AC Specifications—AD9627-125/AD9627-150................. 8

Digital Specifications ................................................................... 9

Switching Specifications—AD9627-80/AD9627-105................ 11

Switching Specifications—AD9627-125/AD9627-150.............. 12

Timing Specifications ................................................................ 13

Absolute Maximum Ratings.......................................................... 15

Thermal Characteristics ............................................................ 15

ESD Caution................................................................................ 15

Pin Configurations and Function Descriptions ......................... 16

Equivalent Circuits ......................................................................... 20

Typical Performance Characteristics ........................................... 21

Theory of Operation ...................................................................... 26

ADC Architecture ...................................................................... 26

Analog Input Considerations.................................................... 26

Voltage Reference ....................................................................... 28

Clock Input Considerations ...................................................... 29

Power Dissipation and Standby Mode..................................... 31

Digital Outputs ........................................................................... 32

Timing.......................................................................................... 32

ADC Overrange and Gain Control.............................................. 33

Fast Detect Overview................................................................. 33

ADC Fast Magnitude ................................................................. 33

ADC Overrange (OR)................................................................ 34

Gain Switching............................................................................ 34

Signal Monitor ................................................................................ 36

Peak Detector Mode................................................................... 36

RMS/MS Magnitude Mode......................................................... 36

Threshold Crossing Mode......................................................... 37

Additional Control Bits ............................................................. 37

DC Correction ............................................................................ 37

Signal Monitor SPORT Output ................................................ 38

Built-In Self-Test (BIST) and Output Test .................................. 39

Built-In Self-Test (BIST)............................................................ 39

Output Test Modes..................................................................... 39

Channel/Chip Synchronization.................................................... 40

Serial Port Interface (SPI).............................................................. 41

Configuration Using the SPI..................................................... 41

Hardware Interface..................................................................... 41

Configuration Without the SPI ................................................ 42

SPI Accessible Features.............................................................. 42

Memory Map .................................................................................. 43

Reading the Memory Map Register Table............................... 43

Memory Map Register Table..................................................... 44

Memory Map Register Descriptions........................................ 47

Applications Information .............................................................. 50

Design Guidelines ...................................................................... 50

Evaluation Board ............................................................................ 51

Power Supplies ............................................................................ 51

Input Signals................................................................................ 51

Output Signals ............................................................................ 51

Default Operation and Jumper Selection Settings................. 52

Alternative Clock Configurations............................................ 52

Alternative Analog Input Drive Configuration...................... 53

Schematics................................................................................... 54

Evaluation Board Layouts ......................................................... 64

Bill of Materials........................................................................... 72

Outline Dimensions ....................................................................... 74

Ordering Guide .......................................................................... 74

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