Datasheet

ADF4159 Data Sheet
Rev. D | 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