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Case ID: 290605

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NFC Tag nRF52840 max voltage and current ratings

user109468 over 4 years ago

Dear Support team,

I am using the NFC Tag of the nRF52840, CKAA F.

What is the maximum rating of voltage and current of the NFC Tag?

-> I set NFCPINS.PROTECT = NFC which is supposed to short circuit at approximately 2 V.

Best regards,
Konstantin

0 user75734 over 4 years ago

Hi Konstantin

The maximum input current on the NFCT pins is 80mA according to the NFCT Electrical specification. As for the voltage, the peak differential field detect threshold on NFC1-NFC2 is 1.2 Vp, while the maximum voltage on the pins themselves would be VDD. Setting NFCPINS.PROTECT = NFC will indeed protect the SoC from high voltage fields by shorting the pins when it exceeds 2V.

Best regards,

Simon
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