The AD8361 is a mean-responding power detector for use in highfrequency receiver and transmitter signal chains, up to 2.5 GHz. It is very easy to apply. It requires only a single supply between 2.7 V and 5.5 V, power supply decoupling capacitor and an input coupling capacitor in most applications. The output is a linear-responding dc voltage with a conversion gain of 7.5 V/V rms. An external filter capacitor can be added to increase the averaging time constant.