AD6653 datasheet(2/80 Pages) AD

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AD6653

Rev. 0 | Page 2 of 80

TABLE OF CONTENTS

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

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

Product Highlights ........................................................................... 1

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

Revision History ............................................................................... 3

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

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

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

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

Digital Specifications ................................................................... 7

Switching Specifications .............................................................. 9

Timing Specifications ................................................................ 10

Absolute Maximum Ratings.......................................................... 13

Thermal Characteristics ............................................................ 13

ESD Caution................................................................................ 13

Pin Configurations and Function Descriptions ......................... 14

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

Typical Performance Characteristics ........................................... 19

Theory of Operation ...................................................................... 24

ADC Architecture ...................................................................... 24

Analog Input Considerations.................................................... 24

Voltage Reference ....................................................................... 26

Clock Input Considerations ...................................................... 27

Power Dissipation and Standby Mode..................................... 29

Digital Outputs ........................................................................... 30

Digital Downconverter .................................................................. 31

Downconverter Modes .............................................................. 31

Numerically Controlled Oscillator (NCO) ............................. 31

Half-Band Decimating Filter and FIR Filter........................... 31

fADC/8 Fixed-Frequency NCO ................................................... 31

Numerically Controlled Oscillator (NCO) ................................. 32

Frequency Translation ............................................................... 32

NCO Synchronization ............................................................... 32

Phase Offset................................................................................. 32

NCO Amplitude and Phase Dither .......................................... 32

Decimating Half-Band Filter and FIR Filter ............................... 33

Half-Band Filter Coefficients.................................................... 33

Half-Band Filter Features .......................................................... 33

Fixed-Coefficient FIR Filter ...................................................... 33

Synchronization.......................................................................... 34

Combined Filter Performance.................................................. 34

Final NCO ................................................................................... 34

ADC Overrange and Gain Control.............................................. 35

Fast Detect Overview................................................................. 35

ADC Fast Magnitude ................................................................. 35

ADC Overrange (OR)................................................................ 36

Gain Switching............................................................................ 36

Signal Monitor ................................................................................ 38

Peak Detector Mode................................................................... 38

RMS/MS Magnitude Mode....................................................... 38

Threshold Crossing Mode......................................................... 39

Additional Control Bits ............................................................. 39

DC Correction ............................................................................ 39

Signal Monitor SPORT Output ................................................ 40

Channel/Chip Synchronization.................................................... 41

Serial Port Interface (SPI).............................................................. 42

Configuration Using the SPI..................................................... 42

Hardware Interface..................................................................... 42

Configuration Without the SPI ................................................ 43

SPI Accessible Features.............................................................. 43

Memory Map .................................................................................. 44

Reading the Memory Map Register Table............................... 44

Memory Map Register Table..................................................... 45

Memory Map Register Description ......................................... 49

Applications Information .............................................................. 53

Design Guidelines ...................................................................... 53

Evaluation Board ............................................................................ 55

Power Supplies ............................................................................ 55

Input Signals................................................................................ 55

Output Signals ............................................................................ 55

Default Operation and Jumper Selection Settings................. 56

Alternative Clock Configurations............................................ 56

Alternative Analog Input Drive Configuration...................... 57

Schematics................................................................................... 58

Evaluation Board Layouts ......................................................... 68

Bill of Materials........................................................................... 76

Outline Dimensions ....................................................................... 78

Ordering Guide .......................................................................... 78

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