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OPA4872-EP: as a video mutiplexer

Part Number: OPA4872-EP
Other Parts Discussed in Thread: OPA4872

Hi

I intend to use OPA4872-ep as a video multiplexer as a replacement of Max440. Is it recommended for video multiplexer? From the spec it looks that it can be used as a video multiplexer?

Does video multiplexer has some special characteristics? I consider OPA4872 can be used as video multiplexer but can you please comment on it.

Also i need to cascade two multiplexers as a 8:1. I want to short A1 pin of two multiplexers and drive it from a host microcontroller. Will it be a problem?  

Regards;

  • Yes, I believe the OPA4872-EP device has superior performance compared to the MAX440 including lower power consumption, higher bandwidth, better gain flatness, and better differential phase and gain error.

    You could achieve a 7:1 MUX with two OPA's in cascaded with the output of OPA1 feeding MUX1 input of OPA1 and MUX2-4 inputs of OPA2 available for signals. To get to 8 inputs (up to 10) you would need three 4:1 MUX's cascaded. Also, I'm not sure how shorting channel control A1 would help you. Perhaps I'm not understanding what you've asked so if you have a architectural drawing, it might be helpful.

    Thanks
    Christian
  • Christian

    Do you have any (video multiplexer) in 8: 1 in a military temperature range.

    Regards;
  • Hi,

    The following is a list of 8:1 muxes offered by TI that cover military temperature range.

    www.ti.com/.../products.html to 125

    As I'm not familiar with these products or this application, you would have to confirm if your system requirements are met by the device specifications.

    Thanks
    Christian