The BGA2803 from NXP Semiconductors is a RF Amplifier with Frequency 0.25 to 2.15 GHz, Gain 21.2 to 24.3 dB, Noise Figure 3 to 4 dB, Output Power -9 to -2 dBm, Output Power 0.0001 to 0.0006 W. Tags: Surface Mount, Power Amplifier. More details for BGA2803 can be seen below.