ADF7021_06 View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

ADF7021_06

High Performance Narrowband ISM Transceiver IC

Analog Devices 

ADF7021

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

Preliminary Technical Data

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

Register 0—N Register............................................................... 28

Register 1—VCO/Oscillator Register ...................................... 29

Register 2—Transmit Modulation Register ............................ 30

Register 3—Transmit/Receive Clock Register........................ 31

Register 4—Demodulator Setup Register ............................... 32

Register 5—IF Filter Setup Register......................................... 33

Register 6—IF Fine Cal Setup Register ................................... 34

Register 7—Readback Setup Register...................................... 35

Register 8—Power Down Test Register................................... 36

Register 9—AGC Register......................................................... 37

Register 10—AFC Register ....................................................... 38

Register 11—Sync Word Detect Register................................ 39

Register 12—SWD/Threshold Setup Register........................ 40

Register 13—3FSK Demod Register ........................................ 41

Register 14—Test-DAC Register .............................................. 41

Register 15—Test Mode Register ............................................. 42

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

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

Rev. PrI | Page 2 of 44

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