0.5-W RF driver amplifier with dynamically adjustable bias

April 10, 2012 // By Jean-Pierre Joosting
To meet the needs of today’s radio and RF communication equipment designers, Analog Devices has introduced the ADL5324 half-Watt RF driver amplifier. When compared to other RF driver amplifiers, the RF driver amplifier offers superior power efficiency and temperature tolerance. It operates over a wide temperature range (-40 °C to +105 °C), and can be biased to operate on less power.

The ADL5324 features dynamically adjustable bias which allows RF designers to set the driver’s power consumption to the performance needs of the system, without the need for a bias resistor. It features low power consumption of 62 mA on 3.3 V, up to 133 mA on 5 V, and can be biased anywhere in between these two points. The amplifier operates over a frequency range of 400 MHz to 4000 MHz and delivers OIP3 of 43 dBm, a P1dB of 29 dBm, a gain of 14.6 dB, and a low noise figure of 3.8 dB at 2140 MHz.

The RF driver amplifier is well-suited for wired and wireless applications including cellular infrastructure, industrial, science, medical (ISM) band power amplifiers, and defence and instrumentation equipment. The ADL5324 has a robust ESD rating of Class 2, ±3 kV, and is available in the SOT-89 package.