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AD9690

Data Sheet

TABLE OF CONTENTS

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

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

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

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

Revision History ............................................................................... 2

General Description ......................................................................... 3

Specifications..................................................................................... 4

DC Specifications ......................................................................... 4

AC Specifications.......................................................................... 5

Digital Specifications ................................................................... 6

Switching Specifications .............................................................. 7

Timing Specifications .................................................................. 8

Absolute Maximum Ratings.......................................................... 10

Thermal Characteristics ............................................................ 10

ESD Caution................................................................................ 10

Pin Configuration and Function Descriptions........................... 11

Typical Performance Characteristics ........................................... 13

AD9690-1000.............................................................................. 13

AD9690-500 ................................................................................ 17

Equivalent Circuits......................................................................... 21

Theory of Operation ...................................................................... 23

ADC Architecture ...................................................................... 23

Analog Input Considerations.................................................... 23

Voltage Reference ....................................................................... 27

Clock Input Considerations...................................................... 28

ADC Overrange and Fast Detect.................................................. 30

ADC Overrange.......................................................................... 30

Fast Threshold Detection (FD)................................................. 30

Signal Monitor ................................................................................ 31

SPORT Over JESD204B............................................................. 31

Digital Downconverter (DDC)..................................................... 34

DDC I/Q Input Selection .......................................................... 34

DDC I/Q Output Selection ....................................................... 34

DDC General Description ........................................................ 34

Frequency Translation ................................................................... 40

General Description................................................................... 40

DDC NCO Plus Mixer Loss and SFDR................................... 41

Numerically Controlled Oscillator .......................................... 41

FIR Filters ........................................................................................ 43

General Description................................................................... 43

Half-Band Filters ........................................................................ 44

DDC Gain Stage ......................................................................... 46

DDC Complex—Real Conversion........................................... 46

DDC Example Configurations ................................................. 47

Digital Outputs ............................................................................... 48

Introduction to the JESD204B Interface ................................. 48

JESD204B Overview .................................................................. 48

Functional Overview ................................................................. 49

JESD204B Link Establishment ................................................. 49

Physical Layer (Driver) Outputs .............................................. 51

JESD204B Tx Converter Mapping........................................... 53

Configuring the JESD204B Link.............................................. 54

Multichip Synchronization............................................................ 56

SYSREF± Setup/Hold Window Monitor................................. 58

Test Modes....................................................................................... 60

ADC Test Modes ........................................................................ 60

JESD204B Block Test Modes .................................................... 61

Serial Port Interface........................................................................ 63

Configuration Using the SPI..................................................... 63

Hardware Interface..................................................................... 63

SPI Accessible Features.............................................................. 63

Memory Map .................................................................................. 64

Reading the Memory Map Register Table............................... 64

Memory Map Register Table..................................................... 65

Applications Information .............................................................. 76

Power Supply Recommendations............................................. 76

Exposed Pad Thermal Heat Slug Recommendations............ 76

AVDD1_SR (Pin 57) and AGND (Pin 56 and Pin 60).............. 76

Outline Dimensions....................................................................... 77

Ordering Guide .......................................................................... 77

REVISION HISTORY

1/15—Revision 0: Initial Version

Rev. 0 | Page 2 of 77

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