Semtech SX1276
The SX1276/77/78/79 transceivers feature the LoRa® long range modem that provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption.
Using Semtech’s patented LoRa modulation technique SX1276/77/78/79 can achieve a sensitivity of over -148dBm using a low cost crystal and bill of materials. The high sensitivity combined with the integrated +20dBm power amplifier yields industry leading link budget making it optimal for any application requiring range or robustness. LoRa also provides significant advantages in both blocking and selectivity over conventional modulation techniques, solving the traditional design compromise between range, interference immunity and energy consumption.
Overview
Features
- LoRa Modem
- 168dB maximum link budget
- +20dBm - 100 mW constant RF output vs. V supply
- +14dBm high efficiency PA
- Programmable bit rate up to 300kbps
- High sensitivity: down to -148dBm
- Bullet-proof front end: IIP3 = -11dBm
- Excellent blocking immunity
- Low RX current of 9.9mA, 200nA register retention
- Fully integrated synthesizer with a resolution of 61Hz
- FSK, GFSK, MSK, GMSK, LoRa and OOK modulation
- Built-in bit synchronizer for clock recovery
- Preamble detection
- 127dB Dynamic Range RSSI
- Automatic RF Sense and CAD with ultra-fast AFC
- Packet engine up to 256 bytes with CRC
- Built-in temperature sensor and low battery indicator
Applications
- Automated Meter Reading
- Home and Building Automation
- Wireless Alarm and Security Systems
- Industrial Monitoring and Control
- Long range Irrigation Systems
Packaging
- QFN 28
Order Codes
- SX1276IMLTRT - Pb-free, Halogen free, RoHS/WEEE compliant product
Diagrams and Specs
Block Diagram
Click diagram to enlarge
Datasheets and Resources
Application Notes
- AN1200.59 Selecting the Optimal Reference Clock
- APP Note Crystal Oscillator Guidance LoRa Modulation V2.2
- Designing for High Efficiency and Low-Harmonic Emissions
- LoRa and FCC Part 15.247: Measurement Guidance
- LoRa Modulation Basics
- LoRa Modulation: Crystal Oscillator Guidance
- MCU Requirements for LoRaWAN
- Reading Channel RSSI During a CAD
- Software Implementation of Data Whitening and CRC
- SX1272 LoRa Calculator
- SX1276 Settings for LoRaMAC
- SX127x Reference Design Overview
- Testing for FCC Pre-Compliance with LoRaWAN Modules
Datasheets
Errata
Reference Designs
- SX1276MB1JCS - 433/868 MHz mbed Shield, Switchless (Ref Design Only)
- SX1276MB1LAS - 433/915 MHz mbed Shield
- SX1276MB1MAS - 433/868 MHz mbed Shield
- SX1276RF1IAS - 169/868 MHz with TCXO
- SX1276RF1JAS - 433/868 MHz
- SX1276RF1KAS - 490/915 MHz