Datasheet

ADF4158 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
ESD Caution .................................................................................. 7
Pin Configuration and Pin Function Descriptions ...................... 8
Typical Performance Characteristics ............................................. 9
Circuit Description ......................................................................... 11
Reference Input Section ............................................................. 11
RF Input Stage ............................................................................. 11
RF INT Divider ........................................................................... 11
25-Bit Fixed Modulus ................................................................ 11
INT, FRAC, and R Relationship ............................................... 11
R-Counter .................................................................................... 11
Phase Frequency Detector (PFD) and Charge Pump ............ 12
MUXOUT and LOCK Detect ................................................... 12
Input Shift Registers ................................................................... 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
Test 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: A Worked Example ........................................ 25
Reference Doubler and Reference Divider ............................. 25
Cycle Slip Reduction for Faster Lock Times ........................... 25
Modulation .................................................................................. 26
Waveform Generation................................................................ 26
Other Waveforms ....................................................................... 28
Fast-Lock Timer and Register Sequences ............................... 32
Fast Lock: An Example .............................................................. 32
Fast Lock: Loop Filter Topology ............................................... 32
Spur Mechanisms ....................................................................... 33
Low Frequency Applications..................................................... 33
Filter Design—ADIsimPLL ....................................................... 33
PCB Design Guidelines for the Chip Scale Package .............. 33
Application of ADF4158 in FMCW Radar ................................. 34
Outline Dimensions ....................................................................... 35
Ordering Guide ........................................................................... 35
Automotive Products ................................................................. 35