AD9691 datasheet(2/72 Pages) AD

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AD9691

Data Sheet

Rev. 0 | Page 2 of 72

TABLE OF CONTENTS

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

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

General Description ......................................................................... 1

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

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

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

Specifications..................................................................................... 3

DC Specifications ......................................................................... 3

AC Specifications.......................................................................... 4

Digital Specifications ................................................................... 5

Switching Specifications .............................................................. 6

Timing Specifications .................................................................. 7

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

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

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

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

Typical Performance Characteristics ........................................... 12

Equivalent Circuits......................................................................... 16

Theory of Operation ...................................................................... 18

ADC Architecture ...................................................................... 18

Analog Input Considerations.................................................... 18

Voltage Reference ....................................................................... 20

Clock Input Considerations...................................................... 21

Power-Down/Standby Mode .................................................... 22

Temperature Diode .................................................................... 22

ADC Overrange and Fast Detect.................................................. 23

ADC Overrange.......................................................................... 23

Fast Threshold Detection (FD_A and FD_B) ........................ 23

Signal Monitor ................................................................................ 24

Digital Downconverters (DDCs).................................................. 27

DDC I/Q Input Selection .......................................................... 27

DDC I/Q Output Selection ....................................................... 27

DDC General Description ........................................................ 27

Frequency Translation ................................................................... 33

General Description................................................................... 33

DDC NCO Plus Mixer Loss and SFDR................................... 34

Numerically Controlled Oscillator .......................................... 34

FIR Filters ........................................................................................ 36

General Description................................................................... 36

Half-Band Filters........................................................................ 37

DDC Gain Stage ......................................................................... 39

DDC Complex to Real Conversion Block............................... 39

DDC Example Configurations ................................................. 40

Digital Outputs ............................................................................... 43

Introduction to the JESD204B Interface ................................. 43

JESD204B Overview .................................................................. 43

Functional Overview ................................................................. 44

JESD204B Link Establishment ................................................. 45

Physical Layer (Driver) Outputs .............................................. 47

Configuring the JESD204B Link.............................................. 48

Multichip Synchronization............................................................ 51

SYSREF± Setup/Hold Window Monitor................................. 52

Test Modes....................................................................................... 54

ADC Test Modes ........................................................................ 54

JESD204B Block Test Modes .................................................... 54

Serial Port Interface........................................................................ 57

Configuration Using the SPI..................................................... 57

Hardware Interface..................................................................... 57

SPI Accessible Features.............................................................. 57

Memory Map .................................................................................. 58

Reading the Memory Map Register Table............................... 58

Memory Map Register Table..................................................... 59

Applications Information .............................................................. 71

Power Supply Recommendations............................................. 71

Exposed Pad Thermal Heat Slug Recommendations............ 71

AVDD1_SR (Pin 78) and AGND (Pin 77 and Pin 81).............. 71

Outline Dimensions....................................................................... 72

Ordering Guide .......................................................................... 72

REVISION HISTORY

7/15—Revision 0: Initial Version

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