HD3SS3411: Switch between signals with different frequencies

user5883344

Part Number: HD3SS3411

Hello,

We are using the HD3SS3411 to switch between two different signal sources.

In our application, we can use signals between 750 MHz - 1.5 GHz and switch between them without any issues.

However, if we use a source with a 150 MHz and the other with 1.5 GHz, while the 150 MHz signal works perfectly the 1.5 GHz signal is lost permanently.

Is this expected behavior from the IC?

Thank you

over 6 years ago

0 Brian Zhou over 6 years ago

TI__Guru**** 160646 points

what is the common mode of these two signals? do you have AC cap on any side of mux?

0 user5883344 over 6 years ago in reply to Brian Zhou

Prodigy 40 points

I followed this design procedure in the datasheet, I used 100 nF capacitors and 1.8V as VBias.

For the common mode voltage, I know for a fact the 1.5 GHz one is 1.4V. I can't tell exactly the common mode voltage for the 150 MHz signal, so I used the design with the bias voltage.