Semtech Corporation (Nasdaq:SMTC), a leading supplier of analog and mixed-signal semiconductors, today introduced the SX1276/77/78 devices, which integrate Semtech’s new LoRa™ (long range) technology.
The SX127X platform delivers superior system performance for range, battery operation and interference immunity while eliminating the need for repeaters and complex infrastructure making it ideal for metering, automation, Internet-of-things (IoT) and machine-to-machine (M2M) applications.
The SX1276, SX1277, and SX1278 are key end-node components in the long-range high-capacity network system offering from Semtech. Semtech’s new SX127x platform incorporates LoRa™ (long range) spread spectrum technology in addition to the traditional GFSK modulation. Spread spectrum technology has been utilized in other applications for a number of years but has not been available until today as a low-cost solution suitable for sensor networks.
Using the LoRa technology, the SX127x family achieves a range of more than 15km (9 miles) in a suburban environment and 2 km to 5 km (3 miles) in a dense urban environment while operating under US, EU, Chinese and Japanese regulatory limits. Most deployed systems for metering, security or industrial automation are limited in range to 1-2 km (less than 1.25 miles) in a suburban environment. The additional range provided by LoRa eliminates the need for repeaters in these applications, significantly simplifying the system design and lowering the total cost of deployment.The SX1276 covers all the major sub-GHz frequency bands while the SX1277 is a cost-optimized version targeted at applications that utilize data rates from 5 kbps to 40 kbps such as security systems. The SX1278 is optimized for the rapidly growing smart meter market in China using the 470-510MHz band. All devices deliver over 100dB of blocking immunity to out-of-band interfering signals, which is a 15dB advantage over competing devices. Additionally, the SX127x family 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 SX127xX’s highly linear RF front-end, makes it the most reliable and robust solution for operating in the presence of strong interfering signals.
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