The MGA-31289 from Broadcom is a RF Amplifier with Frequency 1.9 GHz, Gain 17 to 20 dB, Noise Figure 3 dB, Output Power 21.8 to 23.7 dBm, Output Power 0.15 to 0.23 W. Tags: Surface Mount, Gain Block, Driver Amplifier. More details for MGA-31289 can be seen below.