The HMC603QS16 & HMC603QS16E are general purpose broadband 5-bit positive control GaAs IC digital attenuators in 16 lead QSOP surface mount plastic packages. Covering 0.7 to 3.8 GHz, the insertion loss is less than 1.9 dB typical. The attenuator bit values are 0.5 (LSB), 1, 2, 4 and 8 dB for a total attenuation of 15.5 dB. Attenuation accuracy is excellent at 0.15 dB typical with an IIP3 of +50 dBm. Five bit control voltage inputs, toggled between 0 and +3 to +5V, are used to select each attenuation state at less than 1 uA each. A single Vdd bias of +3 to +5V applied through an external 5K Ohm resistor is required.