ADF4108

Data Sheet

Rev. B | Page 2 of 20

TABLE OF CONTENTS

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

 

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

 

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

 

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

 

Revision History ............................................................................... 2

 

Specifications..................................................................................... 3

 

Timing Characteristics ................................................................ 5

 

Absolute Maximum Ratings............................................................ 6

 

ESD Caution.................................................................................. 6

 

Pin Configuration and Function Descriptions............................. 7

 

Typical Performance Characteristics ............................................. 8

 

Theory of Operation ........................................................................ 9

 

Reference Input Stage................................................................... 9

 

RF Input Stage............................................................................... 9

 

Prescaler (P/P + 1)........................................................................ 9

 

A and B Counters ......................................................................... 9

 

R Counter ...................................................................................... 9

 

Phase Frequency Detector and Charge Pump........................ 10

 

MUXOUT and Lock Detect...................................................... 10

 

Input Shift Register .................................................................... 10

 

Latch Summary........................................................................... 11

 

Reference Counter Latch Map.................................................. 12

 

AB Counter Latch Map ............................................................. 13

 

Function Latch Map................................................................... 14

 

Initialization Latch Map ............................................................ 15

 

Function Latch............................................................................ 16

 

Initialization Latch ..................................................................... 17

 

Power Supply Considerations................................................... 17

 

Interfacing ....................................................................................... 18

 

ADuC812 Interface .................................................................... 18

 

ADSP-21xx Interface ................................................................. 18

 

PCB Design Guidelines for Chip Scale Package......................... 19

 

Outline Dimensions ....................................................................... 20

 

Ordering Guide .......................................................................... 20

 

REVISION HISTORY

9/11—Rev. A to Rev. B

and Endnote 9, Table 1..................................................................... 4

Table 1 ................................................................................................ 4

Changes to Figure 3 and Table 4..................................................... 7

Updated Outline Dimensions ....................................................... 20

12/07—Rev. 0 to Rev. A

Removed TSSOP Package..................................................Universal

Changes to Features.......................................................................... 1

Changes to Table 1 Endnote 10 and Endnote 11.......................... 4

Changes to Table 3............................................................................ 6

Deleted Figure 3................................................................................ 7

Changes to Table 4............................................................................ 7

Changes to Figure 10 and Figure 11............................................... 8

Updated Outline Dimensions ....................................................... 20

Deleted Figure 24............................................................................ 20

Changes to Ordering Guide .......................................................... 20

4/06—Revision 0: Initial Version