we have migrated recently from Mifare Classic to Mifare Plus SE and we have faced many issues of operating distance.
Acoording to application notes, we knew that the Hmin for Mifare Plus SE is 0.8 A/m against 0.25A/m for Mifare classic.
Now we are working on Desfire EV1 and EV2. I cannot find information about Hmin for Desfire.
Can you please give the minimum values for Hmin ?
Dear Ali amaiga,
Hope you are doing great, please check the documentation in Docstore, which is under NDA (Non Disclosure Agreement), you can find card coil design guides the values for Hmin for DESFire EV1 is 0.7 A/m and for DESFire EV2 is 0.4 A/m
Thank you for your reply.
I do not find the documentation for Desfire EV1 and EV2.
Can you please give me the document names?
Mr Ali MAÏGA
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De : jonathaniglesias
Envoyé : jeudi 24 janvier 2019 16:04
À : Ali MAIGA <email@example.com>
Objet : Re: - Re: Minimum magnetic field strength for Mifare Desfire
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Re: Minimum magnetic field strength for Mifare Desfire
reply from Jonathan Iglesias<https://community.nxp.com/people/jonathaniglesias?et=watches.email.thread> in NFC - View the full discussion<https://community.nxp.com/message/1105107?commentID=1105107&et=watches.email.thread#comment-1105107>
Hi Ali amaiga
Please use the following documents:
*Card Coil design notes for Mifare Desfire Ev2 - AN3654
*Card Coil Design Guide - AN11093
*Card coil design notes for MIFARE DESFire EV1 - AN1713
please check all the requirementws this values should be in this documents.