ADF4150 AD [Analog Devices], ADF4150 Datasheet - Page 2

• Manufacturer Part Number: ADF4150
• Description: Fractional-N/Integer-N PLL Synthesizer
• Manufacturer: AD [Analog Devices]

TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 6
Pin Configuration and Function Descriptions ............................. 7
Typical Performance Characteristics ............................................. 9
Circuit Description ......................................................................... 11
Register Maps .................................................................................. 13
REVISION HISTORY
7/11—Revision 0: Initial Version
ADF4150
Timing Characteristics ................................................................ 5
Transistor Count ........................................................................... 6
ESD Caution .................................................................................. 6
Reference Input Section ............................................................. 11
RF N Divider ............................................................................... 11
INT, FRAC, MOD, and R Counter Relationship.................... 11
INT N Mode ................................................................................ 11
R Counter .................................................................................... 11
Phase Frequency Detector (PFD) and Charge Pump ............ 11
MUXOUT and Lock Detect ...................................................... 12
Input Shift Registers ................................................................... 12
Program Modes .......................................................................... 12
Output Stage ................................................................................ 12
Register 0 ..................................................................................... 18
Rev. 0 | Page 2 of 28
Applications Information .............................................................. 25
Outline Dimensions ....................................................................... 28
Register 1 ..................................................................................... 18
Register 2 ..................................................................................... 18
Register 3 ..................................................................................... 20
Register 4 ..................................................................................... 20
Register 5 ..................................................................................... 20
Initialization Sequence .............................................................. 20
RF Synthesizer—A Worked Example ...................................... 21
Modulus ....................................................................................... 21
Reference Doubler and Reference Divider ............................. 21
12-Bit Programmable Modulus ................................................ 21
Cycle Slip Reduction for Faster Lock Times ........................... 22
Spurious Optimization and Fast lock ...................................... 22
Fast Lock Timer and Register Sequences ................................ 22
Fast Lock—An Example ............................................................ 23
Fast Lock—Loop Filter Topology ............................................. 23
Spur Mechanisms ....................................................................... 23
Spur Consistency and Fractional Spur Optimization ........... 24
Phase Resync ............................................................................... 24
Direct Conversion Modulator .................................................. 25
Interfacing ................................................................................... 26
PCB Design Guidelines for Chip Scale Package .................... 26
Output Matching ........................................................................ 27
Ordering Guide .......................................................................... 28