The HMC425A from Analog Devices is a RF Variable Attenuator with Frequency 2.2 to 8 GHz, Attenuation Range 0.5 to 31.5 dB, Attenuation Step 0.5 dB, Attenuation Accuracy ±0.5 dB, Power 23 to 25 dBm (P0.1dB). Tags: Surface Mount, Digital. More details for HMC425A can be seen below.