Innovative transceiver for M2M applications

11 July 2007 Telecoms, Datacoms, Wireless, IoT

The CMX990 from CML is an advanced single-chip RF transceiver with integrated GMSK data modem, which is targeted at global narrowband M2M (machine to machine) products. It boasts a data range of 4 to 16 Kbps with selectable BT values, at RF frequencies of 400 MHz to 1 GHz. It is configurable to both free-format and packet data schemes and can be set to comply with EN 300 113 and FCC CFR 47 Part 90 standards. FEC, CRC, data scrambling and interleaving functions are available. Automatic Rx clock extraction and signal level measurement and compensation allow the CMX990 modem to operate in all signal conditions. Working with an external VCO input, the two programmable on-chip synthesisers provide all the frequencies necessary for wireless data operation. Addressable on-chip auxiliary DACs and ADCs are available for control and monitoring of a wide range of external functions, including system levels and the VCO loops, with separate dedicated functions for RF PA stage and TCXO control. The CMX990 has a wide operational temperature range of -40°C to

+85°C and is available in a 'no-leads' 64-pin VQFN package.

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