High Performance FSK/ASK Transceiver IC Data Sheet ADF7020-1 FEATURES On-chip VCO and fractional-N PLL On-chip 7-bit ADC and temperature sensor Low power, low IF transceiver Fully automatic frequency control loop (AFC) compensates Frequency bands for lower tolerance crystals 135 MHz to 650 MHz, direct output Digital RSSI 80 MHz to 325 MHz, divide-by-2 mode Integrated TRx switch Data rates supported Leakage current <1 A in power-down mode 0.15 kbps to 200 kbps, FSK 0.15 kbps to 64 kbps, ASK 2.3 V to 3.6 V power supply APPLICATIONS Programmable output power Low cost wireless data transfer 20 dBm to +13 dBm in 63 steps Wireless medical applications Receiver sensitivity Remote control/security systems 119 dBm at 1 kbps, FSK, 315 MHz Wireless metering 114 dBm at 9.6 kbps, FSK, 315 MHz Keyless entry 111.8 dBm at 9.6 kbps, ASK, 315 MHz Home automation Low power consumption Process and building control 17.6 mA in receive mode 21 mA in transmit mode (10 dBm output) FUNCTIONAL BLOCK DIAGRAM RSET CREG(1:4) ADCIN MUXOUT TEMP R POLARIZATION LDO(1:4) LNA TEST MUX OFFSET SENSOR CORRECTION LNA FSK/ASK DATA RFIN MUX 7-BIT ADC DEMODULATOR SYNCHRONIZER IF FILTER RSSI RFINB GAIN OFFSET CE CORRECTION AGC DATA CLK CONTROL Tx/Rx DATA I/O CONTROL FSK MOD GAUSSIAN - CONTROL FILTER MODULATOR AFC INT/LOCK CONTROL DIVIDERS/ DIV P N/N+1 RFOUT MUXING SLE SDATA SERIAL PORT SREAD VCO SCLK CP PFD CLK DIV R RING OSC DIV L1 L2 VCOIN CPOUT OSC1 OSC2 CLKOUT Figure 1. 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Technical Support www.analog.com 05669-001ADF7020-1 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Transmit Protocol and Coding Considerations ..................... 26 Applications ....................................................................................... 1 Device Programming after Initial Power-Up ......................... 26 Functional Block Diagram .............................................................. 1 Interfacing to Microcontroller/DSP ........................................ 26 Revision History ............................................................................... 2 Serial Interface ................................................................................ 29 General Description ......................................................................... 3 Readback Format ........................................................................ 29 Specifications ..................................................................................... 4 Register 0N Register ............................................................... 30 Timing Characteristics ................................................................ 8 Register 1Oscillator/Filter Register ...................................... 31 Absolute Maximum Ratings .......................................................... 10 Register 2Transmit Modulation Register (ASK/OOK Mode) ........................................................................................... 32 ESD Caution ................................................................................ 10 Register 2Transmit Modulation Register (FSK Mode) ..... 33 Pin Configuration and Function Descriptions ........................... 11 Register 2Transmit Modulation Register (GFSK/GOOK Typical Performance Characteristics ........................................... 13 Mode) ........................................................................................... 34 Frequency Synthesizer ................................................................... 15 Register 3Receiver Clock Register ....................................... 35 Reference Input ........................................................................... 15 Register 4Demodulator Set-up Register .............................. 36 Choosing Channels for Best System Performance ................. 17 Register 5Sync Byte Register ................................................. 37 Transmitter ...................................................................................... 18 Register 6Correlator/Demodulator Register ...................... 38 RF Output Stage .......................................................................... 18 Register 7Readback Set-up Register .................................... 39 Modulation Schemes .................................................................. 18 Register 8Power-Down Test Register .................................. 40 Receiver Section .............................................................................. 20 Register 9AGC Register ......................................................... 41 RF Front End ............................................................................... 20 Register 10AGC 2 Register .................................................... 42 RSSI/AGC .................................................................................... 21 Register 11AFC Register ....................................................... 42 FSK Demodulators on the ADF7020-1 ................................... 21 Register 12Test Register ......................................................... 43 FSK Correlator/Demodulator ................................................... 21 Register 13Offset Removal and Signal Gain Register ....... 44 Linear FSK Demodulator .......................................................... 23 Outline Dimensions ....................................................................... 45 AFC Section ................................................................................ 23 Ordering Guide .......................................................................... 45 Automatic Sync Word Recognition ......................................... 24 Applications ..................................................................................... 25 LNA/PA Matching ...................................................................... 25 REVISION HISTORY 1/2018Rev. 0 to Rev. A Changed CP-48-3 to CP-48-5 ...................................... Throughout Changes to Figure 6 and Table 4 ................................................... 11 Updated Outline Dimensions ....................................................... 45 Changes to Ordering Guide .......................................................... 45 12/2005Revision 0: Initial Version Rev. A Page 2 of 45