New-Tech Europe Magazine | July 2017

IoT Special Edition

Fig. 3: MLX73290-M block diagram

Melexis highly- integrated RF transceivers

rate of 250kbps, the transceiver is also capable of handling heightened data throughputs. Due 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)

through to 960MHz, the product delivers two RF channels, each with a programmable RF power transmitter (with power detectors) and a highly sensitive RF receiver. It is fully programmable via its serial peripheral interface (SPI). This IC is highly suited to sub-GHz wireless applications like home/ building automation, tire pressure monitoring (TPMS), automatic meter reading (AMR), alarm systems, passive keyless entry (PKE), medical diagnostics and telemetry. Its output power level ranges from -20dBm to 13dBm in 64 steps while its receiver sensitivity can attain -120dBm in a 15kHz bandwidth. With a maximum data

The Melexis MLX73290-M modern RF transceiver provides a solution that works well with wide carrier frequency tolerances. Fig. 3 shows the block diagram of the MLX73290-M. As can be seen, a significant part of the device is digitally-based, this is shown in the grey-shaded box. The MLX73290-M is a multi-channel RF transceiver IC that draws on the long-established technical expertise of Melexis in low power wireless implementation. Addressing the sub-GHz ISM bands from 300MHz

60 l New-Tech Magazine Europe