ADF4159

Data Sheet

Rev. E | Page 2 of 36

TABLE OF CONTENTS

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

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

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

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

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

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

Timing Specifications .................................................................. 5

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

Thermal Resistance ...................................................................... 7

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

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

Typical Performance Characteristics ............................................. 9

Theory of Operation ...................................................................... 11

Reference Input Section............................................................. 11

RF Input Stage............................................................................. 11

RF INT Divider........................................................................... 11

25-Bit Fixed Modulus ................................................................ 11

INT, FRAC, and R Counter Relationship................................ 11

R Counter .................................................................................... 11

Phase Frequency Detector (PFD) and Charge Pump............ 12

MUXOUT and Lock Detect...................................................... 12

Input Shift Register..................................................................... 12

Program Modes .......................................................................... 12

Register Maps.................................................................................. 13

FRAC/INT Register (R0) Map.................................................. 15

LSB FRAC Register (R1) Map................................................... 16

R Divider Register (R2) Map .................................................... 17

Function Register (R3) Map...................................................... 19

Clock Register (R4) Map ........................................................... 21

Deviation Register (R5) Map .................................................... 22

Step Register (R6) Map.............................................................. 23

Delay Register (R7) Map ........................................................... 24

Applications Information .............................................................. 25

Initialization Sequence .............................................................. 25

RF Synthesizer Worked Example ............................................. 25

Reference Doubler...................................................................... 25

Cycle Slip Reduction for Faster Lock Times........................... 25

Modulation.................................................................................. 26

Waveform Generation ............................................................... 26

Waveform Deviations and Timing........................................... 27

Single Ramp Burst...................................................................... 27

Single Triangular Burst.............................................................. 27

Single Sawtooth Burst................................................................ 27

Sawtooth Ramp........................................................................... 27

Triangular Ramp ........................................................................ 27

FMCW Radar Ramp Settings Worked Example...................... 27

Activating the Ramp .................................................................. 28

Other Waveforms ....................................................................... 28

Ramp Complete Signal to MUXOUT ..................................... 31

External Control of Ramp Steps............................................... 31

Interrupt Modes and Frequency Readback ............................ 32

Fast Lock Mode .......................................................................... 33

Spur Mechanisms ....................................................................... 34

Filter Design Using ADIsimPLL .............................................. 34

PCB Design Guidelines for the Chip Scale Package.............. 34

Application of the ADF4159 in FMCW Radar........................... 35

Outline Dimensions....................................................................... 36

Ordering Guide .......................................................................... 36

Automotive Products................................................................. 36