The CMX90A003 is a two-stage, fully matched MMIC PA delivering +29.5 dBm of saturated power for use in the 860 – 960 MHz frequency range, applicable to license-free bands.
The device is optimised for efficiency at low collector voltages of 1.9 – 2.5 V, making it suitable for systems with supercapacitor backup storage, thus extending the discharge period or battery life.
CMX90A003 is highly integrated for ease of use, minimising external component count and reducing board area. RF input and output matching is incorporated on-chip, as well as active bias circuitry and an input DC-blocking capacitor.
Using advanced GaAs HBT technology to provide a combination of high efficiency and gain, the CMX90A003 is ideally suited as a booster PA to extend the wireless range of sub-1 GHz low-power RF transceivers.
Devices are available through our Distributor Network.
Q: The CMX90A003 datasheet states that the device operates at maximum power efficiency by setting the quiescent bias current of each stage. Is it possible to modify the quiescent current of each gain stage to enhance device linearity?
A: By default the component recommendations highlighted in the CMX90A003 datasheet and used on the companion evaluation board (EV90A003) are used to drive the CMX90A003 at optimal efficiency. The main contributor to this mode of operation is quiescent bias current applied to each of the two gain stages.
By modifying these bias currents, it is possible to drive the gain stages to become more linear. CML has investigated this characteristic, for more information please contact email@example.com
The EV90A003 Evaluation Kit is designed to assist in the evaluation and application
PCB Design Files. Rev A - Download