Semtech Corporation, a supplier of analogue and mixed-signal semiconductors, has introduced the SX1272 the first product in a new long-range RFIC platform designed to bost the transmission range of the devices to up to 15 kilometers (km). This device integrates Semtech’s new LoRa (long range) modulation technology to enable drastic range improvements over alternative modulation methods. The maximum distance today of a smart meter transceiver in Europe using FSK modulation is between one and two kilometers. The SX1272, using LoRa operating under the same conditions and regulatory limits, can transmit over 15 km.
The SX1272 has been designed for industrial control, agriculture/irrigation, smart metering and sensor network applications. The additional range provided by LoRa helps to eliminate the need for repeaters in these applications, significantly simplifying the system design and lowering the total cost of deployment. The range extension provided by LoRa also makes the device suitable for emerging smart city, Internet of things (IOT) and machine-to-machine (M2M) applications.
The SX1272 achieves receiver sensitivity up to -137 dBm using a low-cost crystal. This compares to today’s state-of-the-art FSK devices that can achieve sensitivity of -115 dBm with a comparable crystal or -125 using an expensive temperature controlled crystal oscillator (TCXO).
Additionally, the SX1272 has a 25 dB improvement over FSK devices for rejecting in-band interfering signals. This makes the device especially effective in industrial, scientific and medical (ISM)-band applications such as security and metering because it provides immunity from sub-GHz frequency 4G/LTE signals. This immunity, combined with the SX1272’s highly linear RF front-end, makes it the most reliable and robust solution for operating in the presence of strong interfering signals.
“The SX1272 and LoRa is a significant wireless technology advancement that will drive the next volume market deployments for smart cities, sensor networks, IOT and M2M,” said Jean-Paul Bardyn, Chief Technical Officer and Vice President R&D for Semtech’s Wireless & Sensing Product Group. “The long range capabilities of the device combined with Semtech’s low power expertise give the company a unique market position that will drive significant growth for our Wireless and Sensing business unit.”
The fast growth of the IOT/M2M market means that there is a real need for an improved physical layer in this market for long range, low power for battery operation, and low cost for volume deployment. LoRa has been positioned to meet these needs and is seen as complementing 2G/3G GSM in this rapidly growing market.
The SX1272 supports GFSK, FSK, GMSK, and OOK modulation in addition to LoRa and is designed to support WMBus, IEEE 802.15.4g (SUN), FCC 15.247, ARIB T96/108, EN 300-220 as well as other worldwide standards and regulations.