NFCのトピックRe: Vdd for Pullup on FDpin

Vdd for Pullup on FDpin

jesperselander — Mon, 23 Jan 2017 14:52:31 GMT

According to the specification on NTAG213F, max. Vdd for pullup on FDpin recommended is 3.6V. I am using a battery 3.3-4.2V as supply. Is that a problem?

Regards,

Jesper

Re: Vdd for Pullup on FDpin

Jorge_Gonzalez — Mon, 13 Feb 2017 23:08:50 GMT

Hello Jesper Selander,

Actually the limiting value for voltage on the FD pin is 4.6 V. But as stated in the datasheet the exposure to limiting values for extended periods can affect device reliability, see below:

So I highly recommend you to keep VDD voltage below the 3.6 V.

Best Regards!,
Jorge Gonzalez

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Re: Vdd for Pullup on FDpin

jesperselander — Mon, 20 Feb 2017 07:37:02 GMT

Hi Jorge,

Thanks for your reply.

I assume you mean keep VDD voltage below 4.6 V - please confirm.

Best regards,

Jesper Selander

Re: Vdd for Pullup on FDpin

Jorge_Gonzalez — Mon, 20 Feb 2017 17:42:15 GMT

Hi Jesper,

Sorry for the confusion. No, I meant keeping the voltage below 3.6 V, as specified in the datasheet:

Regards!

Jorge Gonzalez

Re: Vdd for Pullup on FDpin

jesperselander — Tue, 21 Feb 2017 10:16:19 GMT

Hi Jorge,

Thanks for the clarification. We will add a diode to make sure the voltage will not exceed 3.6V.

Best regards,

Jesper