Semtech has introduced the SX127x devices, which integrate the company’s new LoRa (long range) RF transceiver technology. The SX1276 covers all the major sub-GHz frequency bands while the SX1277 is a cost-optimised version targeted at applications that utilise data rates from 5 Kbps to 40 Kbps such as security systems. The SX1278 is optimised for the rapidly growing smart meter market in China using the 470 – 510 MHz band. All devices deliver over 100 dB of blocking immunity to out-of-band interfering signals, and offer a 25 dB improvement over FSK devices for rejecting in-band interfering signals. This makes the devices especially effective in ISM-band applications such as security and metering because it provides immunity from sub-GHz frequency 4G/LTE signals.
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