Small-outline RF power amps span 130 to 700 MHz

October 18, 2017 //By Graham Prophet
Small-outline RF power amps span 130 to 700 MHz
CML Microcircuits (Maldon, Essex, UK) has added to its RF Building Block product line with a three-stage wideband, high-gain, high-efficiency RF Power Amplifier IC operating across the 130 MHz to 700 MHz frequency range.

The CMX902 is intended for VHF and low UHF radio applications such as data modules, marine VHF communications, general-purpose, low-power RF transmitters and radio applications used in Industrial Internet of Things (IIOT) systems. It will yield typical output power of 2.8W operating at 160 MHz and 4V: and 1.75W operating at 435 MHz and 3.3V. High power added efficiency (up to 60% at VHF) is a key feature of this device, supporting low-voltage battery-powered applications; it operates from 2.5 to 6V.

The first and second stages of the amplifier operate in a class-A and class-AB mode respectively, and the third stage operates in class-C mode for maximum efficiency. Input and output matched circuits are implemented via external components, allowing designers to adjust for maximum power and efficiency at the desired operating frequency.


The CMX902 offers high power gain up to 39dB and is available in a small footprint 5 x 5 mm low thermal resistance 28-pin WQFN package. An evaluation kit is available.

CML Microcircuits;


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