AD8284

Data Sheet

Rev. D | Page 2 of 28

TABLE OF CONTENTS

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

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

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

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

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

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

AC Specifications.......................................................................... 3

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

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

Absolute Maximum Ratings ....................................................... 7

ESD Caution.................................................................................. 7

Pin Configuration and Function Descriptions............................. 8

Typical Performance Characteristics ........................................... 10

Theory of Operation ...................................................................... 12

Radar Receive Path AFE............................................................ 12

Channel Overview...................................................................... 13

ADC ............................................................................................. 15

AUX Channel.............................................................................. 15

Clock Input Considerations...................................................... 15

Clock Duty Cycle Considerations............................................ 16

Clock Jitter Considerations....................................................... 16

SDI and SDO Pins...................................................................... 16

SCLK Pin ..................................................................................... 16

CS Pin........................................................................................... 16

RBIAS Pin.................................................................................... 16

Voltage Reference ....................................................................... 16

Power and Ground Recommendations................................... 16

Exposed Pad Thermal Heat Slug Recommendations............ 17

Serial Port Interface (SPI).............................................................. 18

Hardware Interface..................................................................... 18

Memory Map .................................................................................. 20

Reading the Memory Map Table.............................................. 20

Logic Levels................................................................................. 20

Reserved Locations .................................................................... 20

Default Values............................................................................. 20

Application Circuits ....................................................................... 24

Packaging and Ordering Information ......................................... 26

Outline Dimensions................................................................... 26

Ordering Guide .......................................................................... 26

Automotive Products................................................................. 26

REVISION HISTORY

8/15—Rev. C to Rev. D

Changed AD951x/AD952x to AD9515/AD9520-0.... Throughout

Added Table 1; Renumbered Sequentially .................................... 1

6/14—Rev. B to Rev. C

Changed 80 MSPS to 60 MSPS .................................... Throughout

Changes to Table 1............................................................................ 3

Changed 6.25 to 8.33, Clock Pulse Width High Parameter,

Clock Pulse Width Low Parameter, and Data Setup Time

Parameter, Table 3............................................................................. 6

7/13—Rev. A to Rev. B

Changes to Input Resistance and Power-Down Dissipation

Parameters; Table 1........................................................................... 3

Updated Outline Dimensions....................................................... 26

Changes to Ordering Guide .......................................................... 26

1/13—Rev. 0 to Rev. A

Changes to Figure 16...................................................................... 14

10/12—Revision 0: Initial Version