Multi-channel RF transceiver suits sub-GHz applications

29th September 2015

Melexis

Barney Scott

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Melexis has introduced the MLX73290-M, a multi-channel RF transceiver IC, drawing on the company’s expertise in low power wireless implementation. Addressing the sub-GHz ISM bands from 300 to 960MHz, the product delivers two RF channels, each with a programmable RF power transmitter and a highly sensitive RF receiver. It is fully programmable via its serial peripheral interface.

This IC is suited to sub-GHz wireless applications like home/building automation, Tyre Pressure Monitoring (TPMS), Automatic Meter Reading (AMR), alarm systems, Passive Keyless Entry (PKE), medical diagnostics and telemetry. Its output power level ranges from -20 to 13dBm while its receiver sensitivity can attain -120dBm in a 15kHz bandwidth. With a maximum data rate of 250kb/s, the transceiver is also capable of handling heightened data throughputs.

Thanks to the high degree of programmability, engineers employing this IC are presented with plenty of scope when it comes to configuring and implementing an RF front-end. A wide variety of different RF parameters can be adjusted (number of channels, frequency resolution, output, frequency deviation, etc.), in order to satisfy specific application criteria. On-off keying (OOK), binary Frequency Shift Keying (FSK), Minimum Shift Keying (MSK), Gaussian Minimum Shift Keying (GMSK) and Gaussian Frequency Shift Keying (GFSK) modulation schemes are supported.

Two RF power detectors provide augmentation of radiated power performance during transmission. An energy harvesting interface allows battery-less power supply by using a solar cell in combination with a super capacitor. This accentuates its value in remote locations where power lines are impractical. Evaluation boards and software tools are also available.

The MLX73290-M is supplied in 5mm² 32-lead QFN package. It has an operational temperature range of -40 to +105°C.