The ADA-4743 from Broadcom is a RF Amplifier with Frequency 2.5 GHz, Gain 15 to 18 dB, Gain Flatness 0.5 to 1.5 dB, Noise Figure 4.2 dB, Output Power 17.1 to 17.7 dBm. Tags: Surface Mount, Gain Block, Power Amplifier. More details for ADA-4743 can be seen below.