SX1261/2 Long Range, Low Power, sub-GHz RF Transceiver Analog Front End & Data Conversion TM LoRa Protocol LNA ADC Modem Engine Matching + LPF SPI PA PLL FSK Modem Data Buffer OSC DC-DC LDO Figure A: SX1261/2 Block Diagram General Description Applications SX1261 and SX1262 sub-GHz radio transceivers are ideal for The level of integration and the low consumption within long range wireless applications. Both devices are SX1261/2 enable a new generation of Internet of Things designed for long battery life with just 4.2 mA of active applications. receive current consumption. The SX1261 can transmit up Smart meters to +15 dBm and the SX1262 can transmit up to +22 dBm Supply chain and logistics with highly efficient integrated power amplifiers. Building automation These devices support LoRa modulation for LPWAN use Agricultural sensors cases and (G)FSK modulation for legacy use cases. The Smart cities devices are highly configurable to meet different TM application requirements utilizing the global LoRaWAN Retail store sensors standard or proprietary protocols. Asset tracking The devices are designed to comply with the physical layer Street lights TM requirements of the LoRaWAN specification released by Parking sensors TM the LoRa Alliance . Environmental sensors The radio is suitable for systems targeting compliance with Healthcare radio regulations including but not limited to ETSI EN 300 Safety and security sensors 220, FCC CFR 47 Part 15, China regulatory requirements Remote control applications and the Japanese ARIB T-108. Continuous frequency coverage from 150 MHz to 960 MHz allows the support of all major sub-GHz ISM bands around the world. SX1261/2 1 of 111 www.semtech.com Data Sheet Rev. 1.2 Semtech DS.SX1261-2.W.APP June 2019 Ordering Information Part Number Delivery Minimum Order Quantity SX1261IMLTRT Tape & Reel 3000 pieces SX1262IMLTRT Tape & Reel 3000 pieces QFN 24 Package, Pb-free, Halogen free, RoHS/WEEE compliant product. Revision History Version ECO Date Modifications 1.0 039166 October 2017 First Release Addition of a note when using a TCXO to explain the XTA cap value change with TCXO in chapter 4.1.3 XTAL Control Block New sub-chapter 5.1.5 Considerations on the DC-DC Inductor Selection 1.1 040046 December 2017 Addition of a note recommending 12 symbols of LoRa preamble for optimal performances in chapter 6.1.1.1 Spreading Factor Addition of a note on SetLoRaSymbNumTimeout in chapter 9.6 Receive Mode Correction of RandomNumber Gen values in chapter 12.1 Register Map Miscellaneous typographical error corrections Addition of a Known Limitations section, see details in Section 15. Clarification of the XOSC START ERR usage in Section 13.3.6 Rename variable timeout(23:0) to delay(23:0) for clarification in Section 13.3.6 Description of how to include RxGain register in the retention memory, see Section 9.6 Correction of the ClearDeviceError command 1.2 047267 June 2019 Correction made to SetTxParams in Table 13-21 Clarification of the maximum packet length in FSK mode with address filtering configuration Clarification of the SignalRssiPkt calculation Update of the sequence in section 14.2 Circuit Configuration for Basic Tx Operation Clarification of the Rx and Sleep periods in RxDutyCycle mode with TCXO enabled SX1261/2 2 of 111 www.semtech.com Data Sheet Rev. 1.2 Semtech DS.SX1261-2.W.APP June 2019