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TS5V330: Can this be used as a NTSC switcher

Kuramochi Tadahiko
Guru 28715 points
Part Number: TS5V330

Hi,

Is it able to use the TS5V330 as NTSC switcher?

I think that it is possible if the power supply is bipolarity,   

Is it correct?

Best Regards,

Kuramochi

  • 0
    TI__Expert 3180 points

    Hello Kuramochi,

    A quick response for your question is yes, you can use any of our analog switches for National Television System Committee  signals, so long as the switch matches their bandwidths and voltage levels.

    Please refer to the link of a previous post about this subject for more information:

    What voltage levels and bandwidth were you thinking about using for your application?

    Thank you,

    Louie

    If I have answered you question, please hit the Verify Answer button.

  • 0 in reply to Louie
    Guru 28715 points
    Louie-san,

    Thank you for your help.

    Required voltage is -286mV~+714mV(1Vp-p) and 9MHz.
    I think it can use if bipolar(±) power supply is given.
    Is it correct?

    Best Regards,
    Kuramochi
  • 0 in reply to Kuramochi Tadahiko
    TI__Expert 3180 points

    Hello Kuramochi,

    I want to advice that there can be repercussions with doing a design like this, as it will not be trivial. This device was not designed to be used with a negative supply rail. With that being said, it is still worth a try, please refer to the snippet from the data sheet below referencing the absolute maximum specs:

    Now there are a couple things to consider using a negative rail affecting:

    1) The protection diode for the device could turn on slightly, leaking a little current and degrading the performance of the switch.

    2) Using a negative rail could affect the performance of the digital logic/comparator within the device which controls the operations of the switches.

    These are just a list of a couple potential issues which may occur.

    Thank you,

    Louie

  • 0 in reply to Louie
    TI__Mastermind 45410 points
    TQ,

    TI doesn't recommend operating this device seeing signals on the data path below ground and cannot grantee the values stated in the datasheet. If there is a signal below ground there is a protection diode present that could become forward biased if there is too much of a negative signal on the data path with respect to ground. Forward biasing this protection diode could cause excess leakage currents.

    Thank you,
    Adam