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
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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Find support and additional resources specifically for LoRa at the links below.
