Semtech SX1261
SX1261, SX1262 and SX1268 sub-GHz radio transceivers are ideal for long range wireless applications. Both devices are designed for long battery life with just 4.2 mA of active receive current consumption. The SX1261 can transmit up to +15 dBm and the SX1262 and SX1268 can transmit up to +22 dBm with highly efficient integrated power amplifiers.
These devices support LoRa® modulation for LPWAN use cases and (G)FSK modulation for legacy use cases. The devices are highly configurable to meet different application requirements utilizing the global LoRaWAN® standard or proprietary protocols.
The devices are designed to comply with the physical layer requirements of the LoRaWAN specification released by the LoRa Alliance™.
The radio is suitable for systems targeting compliance with radio regulations including but not limited to ETSI EN 300 220, FCC CFR 47 Part 15, China regulatory requirements 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.
Overview
Features
- LoRa and FSK Modem
- 170 dB maximum link budget (SX1262 / 68)
- +22 dBm or +15 dBm high efficiency PA
- Low RX current of 4.6 mA
- Integrated DC-DC converter and LDO
- Programmable bit rate up to 62.5 kbps LoRa and 300 kbps FSK
- High sensitivity: down to -148 dBm
- 88 dB blocking immunity at 1 MHz offset
- Co-channel rejection of 19 dB in LoRa mode
- FSK, GFSK, MSK, GMSK and LoRa modulation
- Built-in bit synchronizer for clock recovery
- Automatic Channel Activity Detection (CAD) with ultra-fast AFC
Applications
The level of integration and the low consumption within SX1261/2 enable a new generation of Internet of Things applications.
- Smart meters
- Supply chain and logistics
- Building automation
- Agricultural sensors
- Smart cities
- Retail store sensors
- Asset tracking
- Street lights
- Parking sensors
- Environmental sensors
- Healthcare
- Safety and security sensors
- Remote control applications
Packaging
Part Number | Delivery | Minimum Order Quantity
- SX1261IMLTRT | Tape & Reel | 3’000 pieces
- SX1262IMLTRT | Tape & Reel | 3’000 pieces
- SX1268IMLTRT| Tape & Reel | 3'000 pieces
Diagrams and Specs
Block Diagram
Click diagram to enlarge
Datasheets and Resources
Application Notes
- APP Note Crystal Oscillator Guidance LoRa_Modulation V2.2
- Crystal Oscillator Trimming
- How to Qualify a LoRaWAN Device in Europe
- LoRa Channel Activity Detection (CAD) with SX126x
- MCU Requirements for LoRaWAN
- Recommendations for Best Performance
- RED Replacing R&TTE Impact on LoRaWAN Devices
- RX Duty Cycle in SX1261-SX1262
- Software Manchester Encoding for SX1261-SX1262
- SX1261 LoRa Calculator
- SX1261-SX1262 Reference Design Explanation
- SX1261/2 FCC Pre-Compliance with LoRaWAN™ Modules Application Note
- SX1261/SX1262 Development Kit User Guide
- SX1272 FCC Pre-Compliance with LoRaWAN™ Modules Application Note
Datasheets
Reference Designs
- SX1261DVK1CASTELEC Development Kit - SX1261MB1CAS 923 MHz certified TELEC RF Module
- SX1262DVK1CAS Development Kit - SX1262MB1CAS 915 MHz RF Module
- SX1262DVK1DAS Development Kit - SX1262MB1DAS 868 MHz RF Module
- SX1262DVK1PAS Development Kit - SX1262MB1PAS 915 MHz RF Module
- SX1262MB2CAS 915 MHz mbed Shield
- SX1268DVK1GAS Development Kit - SX1268MB1GAS 490 MHz RF module
- SX1268DVK1NAS Development Kit - SX1268MB1NAS 780 MHz RF module
- SX126x Development Kits Part Numbers
