The IDTF1950 from Renesas is a RF Variable Attenuator with Frequency 150 MHz to 4 GHz, Attenuation Range 33.75 dB, Attenuation Step 0.25 dB, IIP3 65 dBm, Insertion Loss 1.3 dB. Tags: IC, Programmable, Digital. More details for IDTF1950 can be seen below.