The BGA2870 from NXP Semiconductors is a RF Amplifier with Frequency 0.25 to 0.75 GHz, Gain 30.5 to 31.8 dB, Noise Figure 2.6 to 4.1 dB, Output Power 2 to 6 dBm, Output Power 0.002 to 0.004 W. Tags: Surface Mount, Power Amplifier. More details for BGA2870 can be seen below.