We've recently developed a prototype for a product wich uses the HMC472 / HMC792LP4 DC-3.8GHz and 6GHz variable attenuators.
Those devices are sold by Hittite as going from DC, however on the test we cannot go lower than a few MHz (we need to pass/attenuate signals from 50Hz up to 3.5GHz).
The datasheets are vague, they say the operation is from (citing): Near to DC operation. But no indication on how near they go.
Also there is some line saying that the resistors marked as ACGx play a role on that response but they are not clear how?
Can you please help us solving this problem?