The RFDA4005 from Qorvo is a RF Amplifier with Frequency 50 MHz to 4 GHz, Gain 18 dB, Noise Figure 6.3 dB, Output Power 20 dBm, Output Power 0.1 W. Tags: Surface Mount, Digital Variable Gain Amplifier, Power Amplifier. More details for RFDA4005 can be seen below.