The HMC306AMS10 / 306AMS10E from Analog Devices is a RF Variable Attenuator with Frequency 0.7 to 3.8 GHz, Attenuation Range 0.5 to 15.5 dB, Attenuation Step 0.5 dB, Attenuation Accuracy ±0.2 dB, Power 27 to 28 dBm (P0.1dB). Tags: Surface Mount, Digital. More details for HMC306AMS10 / 306AMS10E can be seen below.