LR1121
The LR1121 is Semtech’s third generation ultra-low power LoRa® transceiver. It provides multi-band LoRa and Long Range - Frequency Hopping Spread Spectrum (LR-FHSS) communication over sub-GHz and 2.4GHz ISM bands as well as satellite S-Band connectivity. The LR1121 is designed to comply with the physical layer requirements of the LoRaWAN® specification released by the LoRa Alliance®, while remaining configurable to meet different application requirements and proprietary protocols.
Features
- Low-power high-sensitivity LoRa/(G)FSK half-duplex RF transceiver
- Worldwide ISM frequency bands support in the range 150 - 960MHz (sub-GHz) and 2.4GHz, as well as 2.1GHz S-Band
- Low noise figure RX front-end for enhanced LoRa/(G) FSK sensitivity
- High power PA path +22dBm in the sub-GHz band
- PA path up to +11.5dBm in the 2.4GHz band
- LR-FHSS modulator
- Integrated PA regulator supply selector to simplify dual power +15/+22dBm with one board implementation (sub-GHz)
- Able to support world-wide multi-region BOM, the circuit adapts to matching network to satisfy regulatory limits
- Fully compatible with SX1261/2/8 devices and the LoRaWAN standard, defined by the LoRa Alliance
Cryptographic Engine
- Supports AES-128 encryption/decryption based algorithms
- Handles device parameters such as DevEUI and JoinEUI, as defined by the LoRa Alliance
- Protects confidential information such as encryption keys against unauthorized access
- Stores of NwkKey, AppKey, as defined in the LoRaWAN standard
- Smart meters
- Building automation
- Agricultural sensors
- Smart cities
- Retail store sensors
- Asset tracking
- Street lights
- Parking sensors
- Environmental sensors
- Safety and security sensors
- Remote control applications
- Home automation and appliances
- Radio-controlled toys and drones
Applications
Packaging
- QFN32 5x5mm
Order Codes
- LR1121IMLTRT
Pb(Lead)-Free/RoHS-Green Info
(-40°C to +85°C / 4000 cycles)
(50°C, 4000 Hrs)
Datasheets & Documentation
Application Notes
- AN1200.57 LR11xx Program Memory Update
- AN1200.58: Application note for Long-Range FHSS Demo
- AN1200.59: Selecting the Optimal Reference Clock
- AN1200.62: Best Practices for FCC Pre-Compliance testing of LoRaWAN Modules
- AN1200.64: LR-FHSS System Performance
- AN1200.66: PCB Design Guidelines
- AN1200.73: SX126x/LR11xx SigFox Modulation
- AN1200.76 Application Note for LR11xx IPD Reference Design
- AN1200.80: LoRa® Modem Doppler Immunity
- AN1200.81: Doppler Immunity of the LR-FHSS Modem
- AN1200.92: LR1121 Modem-E Evaluation Guide
Additional Resources
Explore software downloads, documentation, recommended links, and more resources for this product.
LoRa Developer Portal
A place to learn, connect, collaborate, and find resources to help accelerate your Internet of Things development process.
Demonstration
LR-FHSS Demonstration & Drivers
This package contains drivers and demos for Long-Range Frequency Hopping Spread Spectrum (LR-FHSS) transmission.
L2 Protocol Library
LoRa Basics™ Modem LoRaWAN L2 Library
LoRa Basics Modem is an easy-to-use software library that simplifies the development of LoRaWAN® end nodes.
Silicon Driver
LR11xx Transceiver Driver
This package proposes an implementation in C of the driver for LR11XX radio component.
Silicon Microcode
LR1121 Transceiver Firmware
Software Development Kit
LoRa Basics Modem SDK contains several simple examples highlighting LoRa Basic Modem features.
Software Development Kit
LR11xx Transceiver SDK
The LR11xx SDK contains several simple examples for LR11xx transceivers.
Tool
LR11xx Firmware Updater Tool
Reference implementation of the mechanism to update a the LR11x0 firmware.
Distributor/Catalog Supplier Inventory
View product availability from participating distributors below. Browse all distributors here.
| Part # | Country | Qty | Buy | Distributor |
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Resources
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