Can I design a pad without ESD

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wangkes

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for minimum input capicitance and leakage current,
I want to design a input node without ESD protection.

Can I ? Is there any design like this and can run reliably for a long time ?

THANKS.
 

Sure, if you can guarantee for no ESD event during handling, and no over-/undervoltage spike during operation.

As a compromise you could use minimum RDD (resistor-diode-diode) protection + bootstrapping to reduce the input capacitance.
 

You can, but if this is a standard product you will
have a lot of field returns later. Bare inputs can have
handling ESD levels below 10V on modern technologies
and this is very difficult for anyone's production line
to live up to.
 

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