The AD604 from Analog Devices is a RF Amplifier with Frequency DC to 40 MHz, Gain 14 to 20 dB, Noise Figure 1.1 to 12 dB, Output Power 15 dBm, Output Power 0.031 W. Tags: Surface Mount, Low Noise Amplifier, Variable Gain Amplifier, Pre-Amplifier. More details for AD604 can be seen below.