NRF52832 Comparator Module with NFC Front End Chip

RE: NRF52832 Comparator Module with NFC Front End Chip

ketiljo — Tue, 12 Nov 2019 13:25:06 GMT

I've lost you here, sorry. I'm telling you that you have to make sure you don't violate the spec by exceeding the voltage range. How you do that is up to you.

Why do you think you need a 13.56 MHz oscillator? If it's part of the reader IC you are using, I can't help you with that.

The reference schematic for the nRF52323 is available here.

RE: NRF52832 Comparator Module with NFC Front End Chip

Ani — Mon, 11 Nov 2019 17:23:30 GMT

Okay Sure I will do that

RE: NRF52832 Comparator Module with NFC Front End Chip

ketiljo — Mon, 11 Nov 2019 10:19:14 GMT

I'd add zener diodes to ground and VDD to make sure the voltage on the pin doesn't go outside the max rated voltage range at VDD + 0.3 V or GND - 0.3 V. If you're close to the reader, the voltage induced in the antenna can be too high.

RE: NRF52832 Comparator Module with NFC Front End Chip

Ani — Fri, 08 Nov 2019 17:11:20 GMT

Actually there as shown in the above image the input is given to comparator analog pins and apart from that through NFC front end trf7970SPI interface to nrf 5232

Kindly suggest me is it fine to go and any modifications to be done

RE: NRF52832 Comparator Module with NFC Front End Chip

ketiljo — Fri, 08 Nov 2019 14:55:37 GMT

Do you plan to connect the NFC lines from the NFC front end chip to the nRF52832 comparator_ I guess it would work, but you need to protect the pin from over voltage.