ADF4355-2

Data Sheet

Rev. B | Page 2 of 37

TABLE OF CONTENTS

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

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

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

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

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

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

Timing Characteristics ................................................................ 6

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

Transistor Count........................................................................... 7

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

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

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

Circuit Description......................................................................... 13

Reference Input Section............................................................. 13

RF N Divider............................................................................... 13

Phase Frequency Detector (PFD) and Charge Pump............ 14

MUXOUT and Lock Detect...................................................... 14

Input Shift Registers................................................................... 14

Program Modes .......................................................................... 15

VCO.............................................................................................. 15

Output Stage................................................................................ 15

Register Maps.................................................................................. 17

Register 0 ..................................................................................... 19

Register 1 ..................................................................................... 20

Register 2 ..................................................................................... 21

Register 3 ..................................................................................... 22

Register 4 ..................................................................................... 23

Register 5 ..................................................................................... 24

Register 6 ..................................................................................... 25

Register 7 ..................................................................................... 27

Register 8 ..................................................................................... 28

Register 9 ..................................................................................... 28

Register 10................................................................................... 29

Register 11................................................................................... 29

Register 12................................................................................... 30

Register Initialization Sequence ............................................... 30

Frequency Update Sequence..................................................... 31

RF Synthesizer—A Worked Example ...................................... 31

Reference Doubler and Reference Divider ............................. 32

Spurious Optimization and Fast Lock..................................... 32

Optimizing Jitter......................................................................... 32

Spur Mechanisms ....................................................................... 32

Lock Time.................................................................................... 32

Applications Information .............................................................. 34

Direct Conversion Modulator .................................................. 34

Printed Circuit Board (PCB) Design Guidelines for a Chip-

Scale Package .............................................................................. 35

Output Matching........................................................................ 36

Outline Dimensions....................................................................... 37

Ordering Guide .......................................................................... 37