Up/Down Converter Reaches 2.7 GHz

The CMX975 2.7-GHz up/down converter enables small-form-factor, high-frequency RF transceiver designs that require low power consumption. The device integrates up and down conversion mixers and associated frequency generation circuitry, therefore minimizing the number of external components required to configure a complete system.  It features programmable operation, allowing users to fully optimize system design. Both receive and transmit mixers can be selected to operate as a double balanced mixer stage or as image cancelling mixers, intended to ease external filtering requirements and to lower overall system cost.


A flexible switching arrangement allows internal or externally sourced local oscillator signals and the main RF mixers to be driven from an external or integrated VCO.  The integrated Fractional-N PLL allows fine frequency resolution and fast frequency lock. An integer-N PLL and VCO is also integrated to provide an IF local oscillator for superhet architecture operation.


The CMX975 has programmable power management functionality, controlled via a SPI compatible serial bus, operates from a single 2.7-3.6V power supply and is available in a small outline VQFN package. The device is suitable for applications in mobile satellite services, military communications, aircraft surveillance systems, high performance ISM radio applications, and general-purpose RF/IF communication systems. If you thirst for greater knowledge, you can peruse a CMX975 datasheet and/or product preview.


CML Microcircuits Inc.

Winston Salem, NC


[email protected]


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