The CMX90A002 from CML Micro is a Dual-Stage GaAs Power Amplifier (PA) MMIC that operates from 860 to 960 MHz. It is designed for ISM band applications where RF performance, board space, and power architecture are important design considerations. This PA is manufactured using advanced GaAs HBT technology, providing high efficiency and gain in a compact form factor, and can be used as a booster in low-voltage systems or a final-stage PA in high-voltage systems. This amplifier delivers a saturated output power of +32.5 dBm (~1.8 W) with a small-signal gain of 30 dB and a power-added efficiency (PAE) of 49%.
The CMX90A002 also incorporates on-chip impedance matching, active bias circuitry, and a DC-blocking capacitor, minimizing the external component count and board area. This power amplifier requires a 1.9 to 4.5 V DC supply and draws 75 mA of current. Its wide supply voltage range makes it suitable for systems powered by a supercapacitor backup or a single-cell Li-ion battery. This amplifier is available in a VQFN-16 package measuring 3 × 3 mm. It is ideal for automatic meter-reading equipment, smart meters, wireless modules, 868/915 MHz ISM applications, Li-ion battery-powered devices, and IoT applications.
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