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Question ADG451BRZ

doyoon
on Mar 25, 2021

Hi,

I used to micom connect ADG451 1,8,9,16(in)pins

but, After turning off the +15v/-15v power, my microcomputer started to heat up. What is the reason?

Do I need a switching circuit (TR/FET) on pins 1,8,9,16?

Thank you.

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  • +1
    •  Analog Employees 
    on Mar 26, 2021 4:12 PM

    Hi,

    The ADG451 IN pins have internal esd protection diodes. it is likely that you have violated the max ratings of the ADG451.

    The digital inputs must be kept with in 2 volts of the supply.

    To prevent this you could consider our overvoltage protection switches such as the ADG5412F.

    These devices can stand off voltages up to 48 V on the digital pins, both in the power on and power off condition.

    Thanks

    David

Reply
  • +1
    •  Analog Employees 
    on Mar 26, 2021 4:12 PM

    Hi,

    The ADG451 IN pins have internal esd protection diodes. it is likely that you have violated the max ratings of the ADG451.

    The digital inputs must be kept with in 2 volts of the supply.

    To prevent this you could consider our overvoltage protection switches such as the ADG5412F.

    These devices can stand off voltages up to 48 V on the digital pins, both in the power on and power off condition.

    Thanks

    David

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