The MAX2657 from Maxim Integrated is a RF Amplifier with Frequency 1575.42 MHz, Power Gain 19.4 to 19.5 dB, Noise Figure 0.8 dB, Output Power -12.5 dBm, Output Power 0.0001 W. Tags: Surface Mount, Low Noise Amplifier. More details for MAX2657 can be seen below.