Need Help in selecting a part

rajesh sura

Other Parts Discussed in Thread: TLV271, TMUX1072, TS12A12511

Hi,

Need to select a SPDT multiplexer which would select one of the inputs and connect to the output based on the select inputs of the multiplexer

Input 1 : A sense signal ( Output of a TLV271 opamp)

Input 2 : A sense signal ( Output of a TLV271 opamp)

Based on the select signal (0 or 1) I need one of the inputs to be relayed to the output pin of the multiplexer.

Requirements:

Bandwidth > 10MHz ( To make sure that the relayed signal does not have any phase lag introduced).

Resistance of the path < 10E

Current carrying capability of the switch : < 10mA (Ok, even if its more)

Supply voltage: 5V and 12V( Two different cases)

Regards,

Rajesh Sura

over 5 years ago

0 rajesh sura over 5 years ago

Prodigy 60 points

Also, The output of the multiplexer will be connected to another opamp down stream in differential configuration.

0 Adam Torma over 5 years ago in reply to rajesh sura

TI__Mastermind 45340 points

Rajesh,

I couldn't find a perfect match for all of your requirements above.

I have a new 2-channel 2:1 device that will support the 5V case TMUX1072.

I also found the TS12A12511 to support the 12V case but you would need to use 2 of them for your differential signaling.

Would these work for you?

Thank you,
Adam

0 rajesh sura over 5 years ago in reply to Adam Torma

Prodigy 60 points

Dear Adam,

Thanks for your prompt reply.
TMUX1072 looks fine.
Is it possible to have resistance less than 2 Ohms aswell. Lesser the better.

Is there a 4 Channel version of this.

Also, I did not understand this statement "I couldn't find a perfect match for all of your requirements above."..

Which paramter do you think would not satisfy the requirements posted by me?

Regards,
Rajesh

0 Adam Torma over 5 years ago in reply to rajesh sura

TI__Mastermind 45340 points

Rajesh,

The difficult spec to match to a part is the 12V requirements with multiple channels.

There are plenty of 5 V 4-channel 2:1 options below on ti.com.

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Need Help in selecting a part