The DC391A demo board is set up to evaluate the LTC5505-1 and LTC5505-2 RF power detectors performance. Demo board DC391A-A contains LTC5505-1 IC, and DC391A-A contains LTC5505-2 IC. LTC5505-1 and LTC5505-2 are RF power detector ICs with integrated output buffer and voltage reference. The LTC5505 converts an RF input signal at pin 1(RF) to a DC voltage at pin 4(Vout). The RF input frequency range is 300MHz to 2700MHz. Maximum input power is 18dBm. The output voltage at Vout will start at an initial DC value of typically 260mV +/- 90 mV. When the RF signal is applied, the output voltage will increase.