The ADL8120 from Analog Devices is a Low Noise Amplifier (LNA) that operates from 30 kHz to 20 GHz. It delivers 15 dB of gain with a noise figure of less than 2.3 dB and has a saturated output power of up to 17.5 dBm. This LNA has a power-added efficiency (PAE) of 20.5%and provides a return loss of 8-15 dB. It is fabricated on a pseudomorphic high electron mobility transistor (pHEMT) process and has a resistor programmable bias setting.
This LNA has internally matched, DC-coupled RF input and output pins that require external AC coupling capacitors along with a bias inductor on the RF output pin. The RF input is biased through an external inductor connected between the bias voltage pin and the RF input pin. It requires a DC supply of 3.3 V and consumes less than 55 mA of current. This amplifier is available in an RoHS-compliant LFCSP package that measures 2 x 2 mm and is ideal for telecommunications, instrumentation, radar and electronic warfare applications.
