SX1276/77/78/79 WIRELESS, SENSING & TIMING DATASHEET SX1276/77/78/79 - 137 MHz to 1020 MHz Low Power Long Range Transceiver GENERAL DESCRIPTION KEY PRODUCT FEATURES TM The SX1276/77/78/79 transceivers feature the LoRa long TM LoRa Modem range modem that provides ultra-long range spread 168 dB maximum link budget spectrum communication and high interference immunity whilst minimising current consumption. +20 dBm - 100 mW constant RF output vs. V supply TM Using Semtechs patented LoRa modulation technique +14 dBm high efficiency PA SX1276/77/78/79 can achieve a sensitivity of over -148dBm Programmable bit rate up to 300 kbps using a low cost crystal and bill of materials. The high High sensitivity: down to -148 dBm sensitivity combined with the integrated +20 dBm power amplifier yields industry leading link budget making it Bullet-proof front end: IIP3 = -11 dBm optimal for any application requiring range or robustness. Excellent blocking immunity TM LoRa provides significant advantages in both blocking and selectivity over conventional modulation techniques, Low RX current of 9.9 mA, 200 nA register retention solving the traditional design compromise between range, Fully integrated synthesizer with a resolution of 61 Hz interference immunity and energy consumption. TM FSK, GFSK, MSK, GMSK, LoRa and OOK modulation These devices also support high performance (G)FSK modes for systems including WMBus, IEEE802.15.4g. The Built-in bit synchronizer for clock recovery SX1276/77/78/79 deliver exceptional phase noise, Preamble detection selectivity, receiver linearity and IIP3 for significantly lower 127 dB Dynamic Range RSSI current consumption than competing devices. Automatic RF Sense and CAD with ultra-fast AFC ORDERING INFORMATION Packet engine up to 256 bytes with CRC Part Number Delivery MOQ / Multiple Built-in temperature sensor and low battery indicator SX1276IMLTRT T&R 3000 pieces APPLICATIONS SX1277IMLTRT T&R 3000 pieces Automated Meter Reading. SX1278IMLTRT T&R 3000 pieces Home and Building Automation. SX1279IMLTRT T&R 3000 pieces Wireless Alarm and Security Systems. SX1276WS Wafer Form 1 Wafer (2000 dies) Industrial Monitoring and Control Long range Irrigation Systems QFN 28 Package - Operating Range -40 +85C Pb-free, Halogen free, RoHS/WEEE compliant product Rev. 5 - August 2016 Page 1 www.semtech.com 2016 Semtech CorporationSX1276/77/78/79 WIRELESS, SENSING & TIMING DATASHEET Table of contents Section Page 1. General Description ................................................................................................................................................. 9 1.1. Simplified Block Diagram ................................................................................................................................. 9 1.2. Product Versions ............................................................................................................................................10 1.3. Pin Diagram ................................................................................................................................................... 10 1.4. Pin Description ...............................................................................................................................................11 1.5. Package Marking ...........................................................................................................................................12 2. Electrical Characteristics ....................................................................................................................................... 13 2.1. ESD Notice .................................................................................................................................................... 13 2.2. Absolute Maximum Ratings ........................................................................................................................... 13 2.3. Operating Range............................................................................................................................................ 13 2.4. Thermal Properties ........................................................................................................................................ 13 2.5. Chip Specification ..........................................................................................................................................14 2.5.1. Power Consumption.................................................................................................................................. 14 2.5.2. Frequency Synthesis................................................................................................................................. 14 2.5.3. FSK/OOK Mode Receiver .........................................................................................................................16 2.5.4. FSK/OOK Mode Transmitter ..................................................................................................................... 17 2.5.5. Electrical Specification for LoRaTM Modulation ........................................................................................19 2.5.6. Digital Specification ...................................................................................................................................22 3. SX1276/77/78/79 Features.................................................................................................................................... 23 3.1. LoRaTM Modem ............................................................................................................................................ 24 3.2. FSK/OOK Modem .......................................................................................................................................... 24 4. SX1276/77/78/79 Digital Electronics ..................................................................................................................... 25 4.1. The LoRaTM Modem ..................................................................................................................................... 25 4.1.1. Link Design Using the LoRaTM Modem ....................................................................................................26 4.1.2. LoRaTM Digital Interface ...........................................................................................................................34 4.1.3. Operation of the LoRaTM Modem............................................................................................................. 36 4.1.4. Frequency Settings ...................................................................................................................................37 4.1.5. Frequency Error Indication........................................................................................................................ 37 4.1.6. LoRaTM Modem State Machine Sequences .............................................................................................38 4.1.7. Modem Status Indicators........................................................................................................................... 46 4.2. FSK/OOK Modem .......................................................................................................................................... 46 4.2.1. Bit Rate Setting ......................................................................................................................................... 46 4.2.2. FSK/OOK Transmission............................................................................................................................ 47 4.2.3. FSK/OOK Reception ................................................................................................................................. 48 4.2.4. Operating Modes in FSK/OOK Mode........................................................................................................ 54 4.2.5. Startup Times ............................................................................................................................................56 4.2.6. Receiver Startup Options .......................................................................................................................... 59 4.2.7. Receiver Restart Methods......................................................................................................................... 60 4.2.8. Top Level Sequencer ................................................................................................................................ 61 Rev. 5 - August 2016 Page 2 www.semtech.com 2016 Semtech Corporation