
ADF7020
Preliminary Technical Data
TABLE OF CONTENTS
General Description.........................................................................3
Rev. PrH | Page 2 of 40
Specifications.....................................................................................4
Timing Characteristics.....................................................................7
Absolute Maximum Ratings............................................................8
ESD Caution..................................................................................8
Pin Configuration and Function Descriptions.............................9
Frequency Synthesizer...................................................................11
Reference Input Section.............................................................11
Choosing Channels for Best System Performance.................13
Transmitter......................................................................................14
Modulation Schemes..................................................................14
Receiver Section..............................................................................16
RF Front End...............................................................................16
RSSI/AGC Section......................................................................17
FSK Demodulators on the ADF7020.......................................17
FSK Correlator/Demodulator...................................................17
Linear FSK Demodulator..........................................................19
AFC Section................................................................................19
Automatic Sync Word Recognition..........................................20
Applications Section.......................................................................21
LNA/PA Matching......................................................................21
Transmit Protocol and Coding Considerations.....................22
Image Rejection Calibration.....................................................22
Device Programming after Initial Power-Up......................... 22
Serial Interface................................................................................ 24
Readback Format........................................................................ 24
Register 0—N Register............................................................... 25
Register 1—Oscillator/Filter Register...................................... 26
Register 2—Transmit Modulation Register (ASK/OOK
Mode)........................................................................................... 27
Register 2—Transmit Modulation Register (FSK Mode) ..... 28
Register 2—Transmit Modulation Register (GFSK/GOOK
Mode)........................................................................................... 29
Register 3—Receiver Clock Register ....................................... 30
Register 4—Demodulator Setup Register............................... 31
Register 5—Sync Byte Register................................................. 32
Register 6—Correlator/Demodulator Register...................... 33
Register 7—Readback Setup Register...................................... 34
Register 8—Power-Down Test Register .................................. 35
Register 9—AGC Register......................................................... 36
Register 10—AGC 2 Register.................................................... 37
Register 11—AFC Register ....................................................... 37
Register 12—Test Register......................................................... 38
Register 13—Offset Removal and Signal Gain Register ....... 39
Outline Dimensions....................................................................... 40
Ordering Guide .......................................................................... 40
REVISION HISTORY
Revision PrH: Preliminary Version