The HMC290 from Analog Devices is a RF Variable Attenuator with Frequency 700 MHz to 4 GHz, Attenuation Range 2 to 6 dB, Attenuation Step 6 dB, Power 0.63 W, P1dB 24 to 27 dBm. Tags: IC, Programmable, Digital. More details for HMC290 can be seen below.