The AC557 from Teledyne Microwave Solutions is a RF Amplifier with Frequency 0.3 to 500 MHz, Small Signal Gain 13.5 to 15 dB pk-pk, Gain Flatness ±0.5 to ±0.8 dB, Noise Figure 4 to 5 dB, Output Power 13 to 14.7 dBm. Tags: Drop-In, Power Amplifier. More details for AC557 can be seen below.