Low Power IEEE 802.15.4 Zero-IF 2.4 GHz Transceiver IC ADF7241 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 IEEE 802.15.4-2006-compatible (250 kbps) Insertion/detection of preamble address/SFD/FCS Low power consumption IEEEE 802.15.4-2006 frame filtering 19 mA (typical) in receive mode IEEEE 802.15.4-2006 CSMA/CA unslotted modes 21.5 mA (typical) in transmit mode (P = 3 dBm) O Flexible 256-byte transmit/receive data buffer 1.7 A, 32 kHz crystal oscillator wake-up mode SPORT mode High sensitivity Flexible multiple RF port interface 95 dBm at 250 kbps External PA/LNA support hardware Programmable output power Switched antenna diversity support 20 dBm to +4.8 dBm in 2 dB steps Wake-up timer Integrated voltage regulators Very few external components 1.8 V to 3.6 V input voltage range Integrated PLL loop filter, receive/transmit switch, battery Excellent receiver selectivity and blocking resilience monitor, temperature sensor, 32 kHz RC and crystal Zero-IF architecture oscillators Complies with EN300 440 Class 2, EN300 328, FCC CFR47 Flexible SPI control interface with block read/write access Part 15, ARIB STD-T66 Small form factor 5 mm 5 mm 32-lead LFCSP package Digital RSSI measurement Fast automatic VCO calibration APPLICATIONS Automatic RF synthesizer bandwidth optimization Wireless sensor networks Automatic meter reading/smart metering Industrial wireless control Healthcare Wireless audio/video Consumer electronics ZigBee FUNCTIONAL BLOCK DIAGRAM ADF7241 4kB DAC 8-BIT PROGRAM PROCESSOR ROM LNA1 DSSS 2kB ADC DEMOD PROGRAM RADIO RAM CONTROLLER LNA2 256-BYTE ADC PACKET AGC RAM PACKET OCL MANAGER 64-BYTE CDR DAC BBRAM 256-BYTE MCR FRACTIONAL-N PA PRE-EMPHASIS FILTER RF SYNTHESIZER WAKE-UP CTRL SPI GPIO 32kHz 32kHz BATTERY TEMPERATURE 26MHz SPORT RC XTAL LDO 4 BIAS MONITOR SENSOR OSC IRQ OSC OSC Figure 1. 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Description ......................................................................... 3 SPORT Mode .............................................................................. 40 Specifications .................................................................................... 5 Device Configuration .................................................................... 41 General Specifications ................................................................. 5 Configuration Values ................................................................ 41 RF Frequency Synthesizer Specifications.................................. 5 RF Port Configurations/Antenna Diversity ............................... 42 Transmitter Specifications .......................................................... 6 Auxillary Functions ........................................................................ 43 Receiver Specifications ................................................................ 6 Temperture Sensor..................................................................... 43 Auxiliary Specifications ............................................................... 8 Battery Monitor .......................................................................... 43 Current Consumption Specifications ........................................ 9 Wake-Up Controller (WUC) ................................................... 43 Timing and Digital Specifications.............................................. 9 Transmit Test Modes ................................................................. 44 Timing Diagrams ....................................................................... 11 Serial Peripheral interface (SPI) ................................................... 45 Absolute Maximum Ratings ......................................................... 15 General Characteristics ............................................................. 45 ESD Caution................................................................................ 15 Command Access ....................................................................... 45 Pin Configuration and Function Descriptions .......................... 16 Status Word ................................................................................ 45 Typical Performance Characteristics ........................................... 18 Memory Map .................................................................................. 47 Terminology .................................................................................... 22 BBRAM ........................................................................................ 47 Radio Controller ............................................................................. 23 Modem Configuration RAM (MCR) ...................................... 47 Sleep Modes ................................................................................ 25 Program ROM ............................................................................ 47 RF Frequency Synthesizer ............................................................. 26 Program RAM ............................................................................ 47 RF Frequency Synthesizer Calibration .................................... 26 Packet RAM ................................................................................ 47 RF Frequency Synthesizer Bandwidth .................................... 27 Memory Access ............................................................................... 49 RF Channel Frequency Programming .................................... 27 Writing to the ADF7241 ........................................................... 50 Reference Crystal Oscillator ..................................................... 27 Reading from the ADF7241 ...................................................... 50 Transmitter ...................................................................................... 28 Downloadable Firmware Modules .............................................. 53 Transmit Operating Modes ...................................................... 28 Interrupt Controller ....................................................................... 54 IEEE 802.15.4 Automatic RX-To-TX Turnaround Mode .... 30 Configuration ............................................................................. 54 Power Amplifier ......................................................................... 30 Description of Interrupt Sources ............................................. 55 Receiver ............................................................................................ 33 Applications Circuits ..................................................................... 56 Receive Operation ...................................................................... 33 Register Map ................................................................................... 60 Receiver Calibration................................................................... 33 Outline Dimensions ....................................................................... 71 Receive Timing and Control ....................................................... 35 Ordering Guide .......................................................................... 71 Clear Channel Assessment (CCA) ........................................... 36 Link Quality Indication (LQI) .................................................. 36 REVISION HISTORY 9/2020Rev. 0 to Rev. A Changes to Ordering Guide .......................................................... 71 Changed CP-32-12 to CP-32-13 ................................. Throughout Updated Outline Dimensions ....................................................... 71 1/2011Revision 0: Initial Version Rev. A Page 2 of 72