CML front end IC bridges RF and DSP

CML Microcircuits has brought out an analogue front end chip that bridges the gap between a digital radio’s RF section and the DSP/FPGA.

CMX983 - AFE including two RF fractional-N synthesisers - block diagram

CMX983 – AFE including two RF fractional-N synthesisers – block diagram

Called CMX983, it’s designed for Software Designed Radio (SDR). It performs DSP-intensive functions, provides dual-channel analogue-to-digital and digital-to-analogue conversion, includes two RF fractional-N synthesisers and embeds a host of auxiliary ADCs and DACs for use within the radio system.

It is suitable for radio systems employing modulation bandwidths up to 25.8kHz, and it is particularly suited to satellite communication, high-performance wireless data and professional two-way radio systems.

It is highly configurable, supporting numerous sample rates and filtering characteristics. This configurability enables a high level of functionality, integration and connectivity with CML’s RF building block ICs.

It connects with CML’s Direct Conversion Receiver CMX994 and Cartesian Feedback Loop Transmitter CMX998, to provide a complete, small form factor, RF-to-digitised baseband solution operating at up to 1GHz.

It meets the operating power requirements of new SDR based terminals and is powered from separate 3.3V and 1.8V power supplies.  A facility is provided to allow the PLL charge pumps to be operated at up to 4.75V, providing low noise operation. It comes in 64-lead VQFN package.

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