ADF7021 datasheet(2/44 Pages) AD

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ADF7021

Preliminary Technical Data

Rev. PrI | Page 2 of 44

TABLE OF CONTENTS

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

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

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

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

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

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

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

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

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

Frequency Synthesizer ................................................................... 12

Reference Input........................................................................... 12

MUXOUT.................................................................................... 13

Voltage Controlled Oscillator (VCO) ...................................... 14

Choosing Channels for Best System Performance................. 14

Transmitter ...................................................................................... 15

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

Modulation Schemes.................................................................. 15

Spectral Shaping ......................................................................... 17

Modulation and Filtering Options ........................................... 17

Receiver Section.............................................................................. 18

RF Front End............................................................................... 18

RSSI/AGC.................................................................................... 19

FSK Demodulators on the ADF7021....................................... 19

FSK Correlator/Demodulator................................................... 19

Linear 2FSK Demodulator ........................................................ 21

3FSK Demodulator..................................................................... 21

4FSK Demodulator..................................................................... 21

AFC Section ................................................................................ 21

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

Applications..................................................................................... 23

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

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

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

Interfacing to Microcontroller/DSP ........................................ 26

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

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

Outline Dimensions ....................................................................... 44

Ordering Guide .......................................................................... 44

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