SX1280/SX1281 Long Range, Low Power, 2.4 GHz Transceiver with Ranging Capability Analog Front End & Data Conversion LORA Modem & Ranging Protocol LNA ADC Engine FLRC Modem SPI or UART Match PA PLL Data FSK Buffer Modem OSC DC-DC LDO Figure A: Transceiver Block Diagram General Description Key Features The SX1280 and SX1281 transceivers provide ultra long Long Range 2.4 GHz transceiver range communication in the 2.4 GHz band with the High sensitivity, down to -132 dBm linearity to withstand heavy interference. This makes them +12.5 dBm, high efficiency PA the ideal solution for robust and reliable wireless solutions. Low energy consumption, on-chip DC-DC They are the first ISM band transceiver IC of their kind to LoRa, FLRC, (G)FSK supported modulations integrate a time-of-flight functionality, opening up application solutions to track and localize people, pets, Programmable bit rate drones, or objects in a factory. These long range 2.4 GHz Excellent blocking immunity products include multiple physical layers and modulations Ranging Engine, Time-of-flight function to optimize long range communication at high data rate for BLE PHY layer compatibility video and security applications. Very small products for wearables can easily be designed thanks to the high level Low system cost of integration and the ultra-low current consumption which allows the use of miniaturized batteries. Applications The radio is fully compliant with all worldwide 2.4 GHz Home automation & appliances radio regulations including EN 300 440, FCC CFR 47 Part 15 Security systems and the Japanese ARIB STD-T66. Tracking applications The level of integration, low consumption and ranging Wearables & sports/fitness sensors function within the long range 2.4 GHz product line enable Radio-controlled toys & drones enhanced connectivity and provide additional Smart watches & beacons functionality to a new generation of previously unconnected devices and applications. Healthcare SX1280/SX1281 1 of 137 www.semtech.com Data Sheet Rev 2.2 Semtech DS.SX1280-1.W.APP May 2018 Ordering Information Part Number Delivery Order Quantity SX1280IMLTRT Tape & Reel 3000 pieces SX1281IMLTRT Tape & Reel 3000 pieces QFN 24 Package, with the temperature operating range from -40 to 85C Pb-free, Halogen free, RoHS/WEEE compliant product Revision History Version ECO Date Changes and/or Modifications Rev 1.0 035543 February 2017 First Release Added table of effective data rates for the LoRa Modem Correction of the formulas for time-on-air in LoRa Correction of typos in the chapter Host Controller Interface Rev 1.1 037029 May 2017 Update of the application schematic with optional TCXO Update of the reference design BOM Deletion of redundant information in the chapter Thermal Impedance The maximum SPI clock speed is reduced to 18 MHz Addition of a note in chapter 6.2.3Bandwidt on SF and BW to be known in advance Addition of chapter 6.2.6Frequency Erro Addition of calculations of time-on-air in chapter 7.5LoRa Ranging Engine Packe Addition of examples of SPI communication in chapter 11Host Controller Interfac Rev 2.0 040575 February 2018 Update of explanation on SetAutoTx in chapter 13.2.4BLE Specific Function Update of ranging results description in chapter 13.5Ranging Operatio Addition of an explanation of the Reference Design in chapter 14.1Reference Desig Addition of the tape and reel specifications in chapter 15Packaging Informatio Addition of LoRa and Bluetooth trademark information SX1280/SX1281 2 of 137 www.semtech.com Data Sheet Rev 2.2 Semtech DS.SX1280-1.W.APP May 2018