RAK5146-125

Overview

The RAK5146-125 is an LPWAN concentrator module based on the Semtech SX1303 baseband processor and SX126X RF transceivers. It operates in the US915 frequency band with a USB interface. The module supports LoRa demodulation at 125, 250, and 500 kHz bandwidths. Supply voltage ranges from 3.0 V to 3.6 V through the 3.3 Vaux pins. Typical power consumption is 81.6 mA in RX mode and 512 mA in TX mode at 27 dBm output power. It features GPS integration for synchronization.

Feature Summary

• Integrates SX1303 baseband and SX126X transceivers for multi-channel LoRa processing
• Supports Listen Before Talk functionality via integrated GPS timing
• Compact mini-PCIe form factor suitable for size-constrained gateway designs

Applications

• Smart metering fixed networks
• Internet-of-Things (IoT) applications
• LoRaWAN gateway integration

Procurement Notes

Verify that the specific suffix -125 corresponds to the US915 frequency band configuration and USB interface variant. Confirm supply voltage requirements match the 3.0 V to 3.6 V range specified for the 3.3 Vaux pins. Ensure compatibility with host systems requiring mini-PCIe mechanical interfaces. Check for updated datasheets regarding thermal management for typical 512 mA TX current draw.

Selection Notes

Select this module when a compact, low-power LPWAN concentrator is required for US915 regions. The USB interface simplifies connectivity compared to SPI variants. Consider the mini-PCIe footprint for embedded gateway deployments. Verify that the host system can provide the necessary 3.3 Vaux power supply. Evaluate the need for GPS synchronization if Listen Before Talk features are critical for network performance.

Part Context

The RAK5146 series comprises WisLink LPWAN concentrator modules designed for LoRaWAN gateways. Variants differ by frequency band and interface type. The RAK5146-125 specifically targets the US915 band with USB connectivity. Other models in the family may offer SPI interfaces or support different regional frequencies such as EU868 or AS923. All share the core SX1303 and SX126X architecture.

FAQ

What is the typical power consumption during transmission?

The typical power consumption is 512 mA during TX operation at 27 dBm output power.

Does the module support Listen Before Talk?

Yes, the module integrates GPS functionality to enable Listen Before Talk features for improved channel access.