High Performance Frac-N Synthesizer Integrates VCO

The CML Microcircuits CMX940 is a low-power, high-performance, 49 MHz to 2040 MHz Fractional-N PLL with fully-integrated wideband VCOs.

RFMW announces design and sales support for a high performance synthesizer from CML Microcircuits. The CMX940 is a low-power, high-performance Fractional-N PLL with fully-integrated wideband VCOs and programmable output divider, generating RF signals over a continuous frequency range of 49 MHz to 2040 MHz. Two, level-controlled, single-ended RF outputs support Tx and Rx sub-systems. A configurable reference path is used to minimize close-in phase noise and mitigate integer and sub-integer boundary spurious. Available in a 7 x 7 mm VQFN package, the chip configuration is controlled by a SPI compatible C-BUS serial interface and requires only external loop filter and clock reference to provide a complete and very compact RF synthesizer solution with typical phase noise of -122 dBc/Hz, 10 kHz offset at 520 MHz. Drawing only 58 mA from a 3.0 – 3.6V supply, it’s the perfect choice for a wide variety of portable and battery powered wireless applications, including digital narrowband two-way radio equipment compliant with ETSI PMR co-existence standards applicable under the Radio Equipment Directive.


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RFMW is the premier pure play technical distributor of RF & Microwave semiconductors, connectors, and components for our customers and suppliers by providing component, value add, and design solutions through a focused technical sales and marketing organization.

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