High Performance, ISM Band, FSK/ASK Transceiver IC Data Sheet ADF7020 FEATURES 3 dBm IIP3 in high linearity mode On-chip VCO and fractional-N PLL Low power, low IF transceiver On-chip 7-bit ADC and temperature sensor Frequency bands Fully automatic frequency control loop (AFC) compensates 431 MHz to 478 MHz for 25 ppm crystal at 862 MHz to 956 MHz or50 ppm at 862 MHz to 956 MHz 431 MHz to 478 MHz Data rates supported Digital RSSI 0.15 kbps to 200 kbps, FSK Integrated Tx/Rx switch 0.15 kbps to 64 kbps, ASK Leakage current of <1 A in power-down mode 2.3 V to 3.6 V power supply Programmable output power APPLICATIONS 16 dBm to +13 dBm in 0.3 dBm steps Low cost wireless data transfer Receiver sensitivity Remote control/security systems 119 dBm at 1 kbps, FSK Wireless metering 112 dBm at 9.6 kbps, FSK Keyless entry 106.5 dBm at 9.6 kbps, ASK Home automation Low power consumption Process and building control 19 mA in receive mode Wireless voice 26.8 mA in transmit mode (10 dBm output) FUNCTIONAL BLOCK DIAGRAM RSET CREG 1:4 ADCIN MUXOUT ADF7020 TEMP R LDO(1:4) LNA TEST MUX OFFSET SENSOR CORRECTION LNA FSK/ASK DATA RFIN MUX DEMODULATOR SYNCHRONIZER 7-BIT ADC IF FILTER RSSI RFINB GAIN OFFSET CORRECTION CE AGC DATA CLK CONTROL Tx/Rx DATA I/O CONTROL FSK MOD GAUSSIAN - CONTROL FILTER MODULATOR AFC INT/LOCK CONTROL DIVIDERS/ RFOUT DIV P N/N + 1 MUXING SLE SDATA SERIAL PORT SREAD VCO SCLK CP PFD CLK DIV R OSC DIV VCOIN CPOUT CLKOUT OSC1 OSC2 Figure 1. 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Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 05351-001ADF7020 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Transmit Protocol and Coding Considerations ..................... 27 Applications ....................................................................................... 1 Device Programming after Initial Power-Up ............................. 27 Functional Block Diagram .............................................................. 1 Interfacing to Microcontroller/DSP ........................................ 27 Revision History ............................................................................... 3 Power Consumption and battery lifetime calculations ......... 28 General Description ......................................................................... 4 Serial Interface ................................................................................ 31 Specifications ..................................................................................... 5 Readback Format ........................................................................ 31 Timing Characteristics ..................................................................... 8 Registers ........................................................................................... 32 Timing Diagrams .......................................................................... 8 Register 0N Register ............................................................... 32 Absolute Maximum Ratings .......................................................... 10 Register 1Oscillator/Filter Register ...................................... 33 ESD Caution ................................................................................ 10 Register 2Transmit Modulation Register (ASK/OOK Mode) ........................................................................................... 34 Pin Configuration and Function Descriptions ........................... 11 Register 2Transmit Modulation Register (FSK Mode) ..... 35 Typical Performance Characteristics ........................................... 13 Register 2Transmit Modulation Register (GFSK/GOOK Frequency Synthesizer ................................................................... 15 Mode) ........................................................................................... 36 Reference Input ........................................................................... 15 Register 3Receiver Clock Register ....................................... 37 Choosing Channels for Best System Performance ................. 17 Register 4Demodulator Setup Register ............................... 38 Transmitter ...................................................................................... 18 Register 5Sync Byte Register ................................................. 39 RF Output Stage .......................................................................... 18 Register 6Correlator/Demodulator Register ...................... 40 Modulation Schemes .................................................................. 18 Register 7Readback Setup Register ...................................... 41 Receiver ............................................................................................ 20 Register 8Power-Down Test Register .................................. 42 RF Front End ............................................................................... 20 Register 9AGC Register ......................................................... 43 RSSI/AGC .................................................................................... 21 Register 10AGC 2 Register .................................................... 44 FSK Demodulators on the ADF7020 ....................................... 21 Register 11AFC Register ....................................................... 44 FSK Correlator/Demodulator ................................................... 21 Register 12Test Register ......................................................... 45 Linear FSK Demodulator .......................................................... 23 Register 13Offset Removal and Signal Gain Register ....... 46 AFC .............................................................................................. 23 Outline Dimensions ....................................................................... 47 Automatic Sync Word Recognition ......................................... 24 Ordering Guide .......................................................................... 47 Applications Information .............................................................. 25 LNA/PA Matching ...................................................................... 25 Image Rejection Calibration ..................................................... 26 Rev. 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