High Performance Frac-N Synthesizer Integrates VCO

RFMW announced 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 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. Consuming only 58 mA from a 3.0 to 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.