HMC939A Digital Attenuators

Analog Devices HMC939A is designed as a 5-bit broadband GaAs IC digital attenuator MMIC chip. Operating from 0.1 to 40GHz, the HMC939A has a typical insertion loss of less than 5dB. The device features attenuator bit values of 1.0 (LSB), 2, 4, 8, 16 for a total attenuation of 31dB. HMC939A achieves excellent attenuation accuracy at less than ±1.0dB typical step error and an IIP3 of +43dBm. HMC939A’s five control voltage inputs, which can toggle between +5V and 0V, are select for each attenuation state.