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AM3352: ADC ESD issue

Part Number: AM3352

Hello,

After ESD test, only ADC block(AINx pins) are not working.

Make ESD protection circuit for AINx pins as attached, but it doesn't work.

How can I make protection circuit to protect AINx pins? Could you recommend any protection circuit?

Regards,

Nicky

AM3352_AINx_ESD.pdf