How does a signal switch work?

Benjamin Brammer36

Other Parts Discussed in Thread: TS3L110

Hey Adam,
just one more little question:

Do i need to terminate my differential lines coming from a 50 Ohm source interfacing with the TS3L110? So for instance a 100 Ohm differential termination at the TS3L110 input. My maximum frequency is 100MHz. i am still not sure I understand how the switch works, assuming it would only work as a resistor (Ron approx. 8 Ohm) I would not need termination. But I hardly believe that. But on the other hand, i don't see any datasheet entry for input or uptut resistance...

so what is this black magic switch? ;)

bestr regards

Benjamin

over 7 years ago

0 Adam Torma over 7 years ago

TI__Mastermind 45340 points

Benjamin,

Here are a few resources to help you understand how passive FET switches perform their black magic.

Below are some excerpts from Selecting the Right Texas Instruments Signal Switch

Below is an excerpt from the signal switches e2e frequently asked questions FAQ page:

Let me know if you have other questions about solid state signal switch black magic. I may be working on updating some of this material and may be able to help point out what is not clear about these documents.

Adam

0 Benjamin Brammer36 over 7 years ago in reply to Adam Torma

Prodigy 200 points

perfect! exactly that was what i was looking for..I will appreciate to read it :)

0 Benjamin Brammer36 over 7 years ago in reply to Adam Torma

Prodigy 200 points

I think it would be perfect to find such a marvelous application note right at the top of the product site. This would be also perfect for all different product categories, so that it is possible to get a good look on each different product topic.

(just a little customer wish) :)

0 Adam Torma over 7 years ago in reply to Benjamin Brammer36

TI__Mastermind 45340 points

Thank you for the feedback. Its too bad the authors of the marvelous application note are no longer here to see your glowing review. I will send this feed back to our marketing team to see if we can get this app note moved to top of the product page. Good luck designing.

0 Adam Torma over 7 years ago in reply to Benjamin Brammer36

TI__Mastermind 45340 points

Anyone else reading this and have additional questions or topics the might be helpful let me know as I may write a new app note with your additional questions.

Switches & multiplexers

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How does a signal switch work?