Low Power IEEE 802.15.4/Proprietary GFSK/FSK Zero-IF 2.4 GHz Transceiver IC ADF7242 FEATURES On-chip low power processor performs Radio control Frequency range (global ISM band) Packet management 2400 MHz to 2483.5 MHz Packet management support Programmable data rates and modulation Insertion/detection of preamble/SWD/CRC/address IEEE 802.15.4-2006-compatible (250 kbps) IEEEE 802.15.4-2006 frame filtering GFSK/FSK/GMSK/MSK modulation IEEEE 802.15.4-2006 CSMA/CA unslotted modes 50 kbps to 2000 kbps data rates Flexible 256-byte transmit/receive data buffer Low power consumption IEEEE 802.15.4-2006 and GFSK/FSK SPORT modes 19 mA (typical) in receive mode Fast settling automatic frequency control 21.5 mA (typical) in transmit mode (P = 3 dBm) O Flexible multiple RF port interface 1.7 A, 32 kHz crystal oscillator wake-up mode External PA/LNA support hardware High sensitivity (IEEE 802.15.4-2006) Switched antenna diversity support 95 dBm at 250 kbps Wake-up timer High sensitivity (0.1% BER) Very few external components 96 dBm at 62.5 kbps (GFSK) Integrated PLL loop filter, receive/transmit switch, battery 93 dBm at 500 kbps (GFSK) monitor, temperature sensor, 32 kHz RC and crystal 90 dBm at 1 Mbps (GFSK) oscillators 87.5 dBm at 2 Mbps (GFSK) Flexible SPI control interface with block read/write access Programmable output power Small form factor 5 mm 5 mm 32-lead LFCSP package 20 dBm to +4.8 dBm in 2 dB steps Integrated voltage regulators APPLICATIONS 1.8 V to 3.6 V input voltage range Wireless sensor networks Excellent receiver selectivity and blocking resilience Automatic meter reading/smart metering Zero-IF architecture Industrial wireless control Complies with EN300 440 Class 2, EN300 328, FCC CFR47 Healthcare Part 15, ARIB STD-T66 Wireless audio/video Digital RSSI measurement Consumer electronics Fast automatic VCO calibration ZigBee Automatic RF synthesizer bandwidth optimization FUNCTIONAL BLOCK DIAGRAM ADF7242 4kB DAC 8-BIT FSK PROGRAM PROCESSOR DEMOD ROM LNA1 2kB ADC PROGRAM RADIO DSSS RAM CONTROLLER DEMOD LNA2 256-BYTE ADC PACKET AGC RAM PACKET OCL MANAGER 64-BYTE AFC DAC BBRAM CDR 256-BYTE MCR FRACTIONAL-N GAUSSIAN FILTER PA RF SYNTHESIZER PRE-EMPHASIS FILTER WAKE-UP CTRL SPI GPIO 32kHz 32kHz BATTERY TEMPERATURE 26MHz SPORT LDO 4 BIAS RC XTAL MONITOR SENSOR OSC IRQ OSC OSC Figure 1 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. 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Trademarks and registered trademarks are the property of their respective owners. 08912-001ADF7242 TABLE OF CONTENTS Features .............................................................................................. 1 IEEE 802.15.4-2006 Receive Timing and Control ..................... 50 Applications....................................................................................... 1 Clear Channel Assessment (CCA)........................................... 51 Functional Block Diagram .............................................................. 1 Link Quality Indication (LQI).................................................. 52 Revision History ............................................................................... 3 IEEE 802.15.4 Automatic TX-to-RX Turnaround Mode...... 53 General Description ......................................................................... 4 IEEE 802.15.4 Frame Filtering, Automatic Acknowledge, and Automatic CSMA/CA................................................................ 53 Specifications..................................................................................... 6 Receiver in GFSK/FSK Mode ................................................... 56 General Specifications ................................................................. 6 Receiver Radio Blocks ............................................................... 61 RF Frequency Synthesizer Specifications.................................. 6 SPORT Interface ............................................................................. 63 Transmitter Specifications........................................................... 7 GFSK/FSK SPORT Mode.......................................................... 63 Receiver Specifications ................................................................ 8 IEEE 802.15.4-2006 SPORT Mode........................................... 65 Auxiliary Specifications............................................................. 11 Device Configuration .................................................................... 66 Current Consumption Specifications ...................................... 12 Configuration Values Common to IEEE 802.15.4 and Timing and Digital Specifications............................................ 13 GFSK/FSK Modes ...................................................................... 67 Timing Diagrams........................................................................ 15 Configuration Values for GFSK/FSK Packet and SPORT IEEE 802.15.4 TX SPORT Mode Timing Diagrams.............. 18 Modes........................................................................................... 67 GFSK/FSK RX SPORT Mode Timing Diagrams ................... 18 Configuration Values for IEEE 802.15.4-2006 Packet and Absolute Maximum Ratings.......................................................... 22 SPORT Modes............................................................................. 68 ESD Caution................................................................................ 22 RF Port Configurations/Antenna Diversity................................ 69 Pin Configuration and Function Descriptions........................... 23 Auxillary Functions........................................................................ 70 Typical Performance Characteristics ........................................... 25 Temperture Sensor ..................................................................... 70 Terminology .................................................................................... 34 Battery Monitor .......................................................................... 70 Radio Controller............................................................................. 35 Wake-Up Controller (WUC).................................................... 70 Sleep Modes................................................................................. 37 Transmit Test Modes.................................................................. 71 RF Frequency Synthesizer ............................................................. 38 Serial Peripheral interface (SPI) ................................................... 72 RF Frequency Synthesizer Calibration .................................... 38 General Characteristics ............................................................. 72 RF Frequency Synthesizer Bandwidth..................................... 38 Command Access....................................................................... 72 RF Channel Frequency Programming..................................... 39 Status Word ................................................................................. 72 Reference Crystal Oscillator ..................................................... 39 Memory Map .................................................................................. 74 Transmitter ...................................................................................... 40 BBRAM........................................................................................ 74 Transmit Operating Modes....................................................... 40 Modem Configuration RAM (MCR) ...................................... 74 Transmitter in IEEE 802.15.4-2006 Mode .............................. 40 Program ROM ............................................................................ 74 IEEE 802.15.4 Automatic RX-To-TX Turnaround Mode..... 43 Program RAM ............................................................................ 74 Transmitter in GFSK/FSK Mode.............................................. 43 Packet RAM ................................................................................ 74 Power Amplifier.......................................................................... 46 Memory Access............................................................................... 76 Receiver............................................................................................ 48 Writing to the ADF7242............................................................ 77 Receive Operating Modes ......................................................... 48 Reading from the ADF7242...................................................... 77 Receiver in IEEE 802.15.4-2006 Mode .................................... 48 Downloadable Firmware Modules............................................... 80 Receiver Calibration................................................................... 49 Interrupt Controller ....................................................................... 81 Rev. 0 Page 2 of 108