The CMX990 GMSK Packet-Data Modem with RF Transceiver

Shortlisted as 'Semiconductor Product of the Year' in the European Elektra Awards, CML's CMX990 is an advanced single-chip RF transceiver with integrated GMSK data modem, which is targeted at global narrowband M2M (machine to machine) products.
The CMX990 is seeing extensive deployment in many leading M2M applications, from vending and cold-chain telemetry to traffic congestion monitoring systems. CML's innovative half-duplex IC offers a versatile baseband modem, IF and RF processing functions, programmable synthesisers, signal-level setting functions and comprehensive on-chip and peripheral control, monitoring and interfacing.

The CMX990 boasts a data range of 4 to 16 kb/s with selectable BT values, at RF frequencies of 400MHz to 1GHz. The CMX990 is configurable to both freeformat and packet data schemes and can be set to comply with EN 300 113 and FCC CFR 47 Part 90 standards.
This makes the tiny VQFN chip ideal for new generation wireless modems, particularly those deployed in compact M2M data devices, such as automatic meter readers.

In freeformat or packet-data operations, the CMX990 employs simple task-command configuration to provide simplicity and efficiency in the control and operation of the modem. 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.

With an extremely low operational power requirement of 3.0 volts, optimum power consumption can be assured at all times by the separate dynamic powersaving of unused functions. The CMX990 has a wide operational temperature range of -40C to +85C and is available in a 'no-leads' 64-pin VQFN package.

Full-featured PCB based evaluation kits are available from CML, to speed-up design-in and to allow designers full access to all functions of the CMX990 and its external components. Further assistance is available from CML's dedicated help-desk: www.cmlmicro.com for more information.

The CMX990 OEM guide price is $10.83 (US). Full product specifications, reference design information and the advanced features of the CMX990 are available from the CML website product areas.

Further assistance is available from CML via: press@cmlmicro.com