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ADS8685: Does it require an external protection circuit?

VEERAMANI VISWANATHAN B
Prodigy 85 points

Part Number: ADS8685

hi,

   Does ADS8685 require an external Input protection circuit? This question is because of the fact that it already has a OVP inside of it.

  • 0
    TI__Guru 50515 points

    Hello VEERAMANI,

    Welcome to E2E forum.

    ADS8685 has internal input protection circuit and it can provide a protection up to +/-20V(+/-11V for loss of AVDD), but if an overvoltage on the input is a common event in your system, external diodes are strongly recommended to use on the input of the ADC as a secondary clamp protection, also a resistor is recommended in series with the input to limit the current and protect ADC input and the diodes.

     

    Thanks

    Best&regards

    Dale