The ADA-4643 from Broadcom is a RF Amplifier with Frequency 2.5 GHz, Gain 15.5 to 18.5 dB, Gain Flatness 0.5 to 1.8 dB, Noise Figure 3.9 to 4 dB, Output Power 13.4 to 14.7 dBm. Tags: Surface Mount, Gain Block, Power Amplifier. More details for ADA-4643 can be seen below.