The CMD279C3 is a positive controlled, wideband GaAs MMIC 5-bit digital attenuator that operates from 2 to 18 GHz (S, C, X, Ku Band). Each bit of the attenuator is controlled by a single voltage of either 0 V or +5 V. The attenuator bit values are 0.5 (LSB), 1, 2, 4, and 8 dB, for a total attenuation of 15.5 dB with an attenuation accuracy of 0.2 dB step error. It has a low insertion loss of 3.5 dB at 9 GHz and can handle an input power of up to 27 dBm. The CMD279C3 is available in a 3 x 3mm QFN surface mount package and is matched to 50 ohms which eliminate the need for RF port matching.
