ADF7025 datasheet(2/44 Pages) AD

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ADF7025

Rev. A | Page 2 of 44

TABLE OF CONTENTS

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

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

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

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

General Description ......................................................................... 3

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

Timing Characteristics..................................................................... 7

Timing Diagrams.......................................................................... 7

Absolute Maximum Ratings............................................................ 9

ESD Caution.................................................................................. 9

Pin Configuration and Function Descriptions........................... 10

Typical Performance Characteristics ........................................... 12

Frequency Synthesizer ................................................................... 15

Reference Input Section............................................................. 15

Choosing Channels for Best System Performance................. 17

Transmitter ...................................................................................... 18

RF Output Stage.......................................................................... 18

Modulation Scheme ................................................................... 18

Receiver............................................................................................ 19

RF Front End............................................................................... 19

RSSI/AGC.................................................................................... 20

FSK Demodulators on the ADF7025....................................... 20

FSK Correlator/Demodulator................................................... 20

Linear FSK Demodulator .......................................................... 22

Automatic Sync Word Recognition ......................................... 22

Applications Section....................................................................... 23

LNA/PA Matching...................................................................... 23

Transmit Protocol and Coding Considerations ..................... 24

Device Programming after Initial Power-Up ............................. 24

Interfacing to Microcontroller/DSP ........................................ 24

Serial Interface ................................................................................ 27

Readback Format........................................................................ 27

Registers........................................................................................... 28

Outline Dimensions ....................................................................... 41

Ordering Guide .......................................................................... 41

REVISION HISTORY

2/06—Rev. 0 to Rev. A

Replaced Figure 40 ................................................................ Page 29

1/06—Revision 0: Initial Version

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