Switch requirement for RF application

Karthik Menon

Hi,

We are looking for a DPDT (or 2xSPDT) switch in which the COM line can stay connected to the NC line even if the chip is not powered. In most of the switch ICs, all three lines - COM, NO and NC - go into high impedance mode when the power supply is removed.

Kindly suggest parts which could be helpful for us.

Regards

over 3 years ago

0 Nikhil Kanzarkar over 3 years ago

TI__Prodigy 100 points

Hi Karthik,

While we do not have an RF switch specifically, I did have a quick questions regarding the RF application. Does your application need to pass signals when Vdd=0?

We do provide powered off protection, which allows for the switch to go high impedance when there is no VDD present. This keeps the voltage at the inputs from back powering any other devices on the VDD rail, as well as keeping the output isolated from the input.

Regards,

Nikhil

0 Karthik Menon over 3 years ago in reply to Nikhil Kanzarkar

Prodigy 130 points

Hi Nikhil,

Yes, in our application, we need the signal be allowed to pass through one of the channels (COM to NC) when the Vdd is not supplied with any power. This is to cover scenarios like dead battery conditions where the system won't able to source any power.

Regards

0 Nikhil Kanzarkar over 3 years ago in reply to Karthik Menon

TI__Prodigy 100 points

Hi Karthik,

We do not, currently, have a switch that passes signals when Vdd = 0 V.

If you could explain your application, we can add the details to our backlog and share the details with the product definition team.

Regards,

Nikhil

0 Karthik Menon over 3 years ago in reply to Nikhil Kanzarkar

Prodigy 130 points

Nikhil,

Thank you!

Unfortunately I won't be able to discuss our application details on an open forum.

Regards.

RF & microwave

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Switch requirement for RF application