Product description

The CMX902 is a three stage high-gain and high efficiency RF power amplifier. The device is ideally suited for use in VHF and UHF frequency bands up to 700MHz. The first and second stages of the amplifier operate in a class-A and class-AB mode respectively, and the third stage operates in a class-C mode for maximum efficiency. External components are required to match the device input and output ports to 50 Ohms. The CMX902 is available in a small footprint 5mm x 5mm, low thermal resistance 28-pin WQFN package making it ideal for small form factor applications such as data modules as well as handheld radio terminals.

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  • Wide operating frequency range 130MHz to 700MHz
  • Typical output power:
    – 2.8W operating at 160MHz (4V)
    – 1.75W operating at 435MHz (3.3V)
  • High power gain up to 39dB
  • High power added efficiency up to 60% at VHF
  • Single polarity supply voltage 2.5V to 6V
  • Small 28 pin WQFN package


  • Marine AIS Class-B and Marine AIS-SART
  • Wireless data communications FSK, FFSK/MSK, GFSK/GMSK, Multi-level FSK
  • Analogue FM handheld radio terminals
  • Automatic meter reading (AMR)
  • Wireless sensor networks Mesh/Ad hoc systems
  • Remote control and sensing systems
  • Commercial and consumer communications

Power supply requirement

  • 2.5 to 6 V

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Design resources

EV9011/EV9021 Evaluation Kits



The EV9011/EV9021 are Evaluation Kits for the CMX901 and CMX902. These products are wideband RF power amplifiers with high efficiency and high gain and may be used as  power amplifiers or driver amplifiers.


EV9011+EV9021_Product_Preview (rev 1)

EV9011_EV9021 User Manual (rev 1)



Knowledge Base

EV9011/EV9021 Support Pack. Gerbers, tooling, layer stack and BOM for the EV9011/EV9021 Evaluation Kit. Version A01.
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EV9021-160 Board Schematics. Hi-res schematic for EV9021-160 Evaluation Kit 160MHz variant. Version A01.
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EV9021-435 Board Schematics. Hi-res schematic for EV9021-435 Evaluation Kit 435MHz variant. Version A01.
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Package: QT8

28-pin WQFN

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