Minimum magnetic field strength for Mifare Desfire

[aliamaiga]

Dear all,

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 ?

Best regards,

[Jonathan_Iglesias]

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

BR

Jonathan

[aliamaiga]

Dear Jonathan,

Thank you for your reply.

I do not find the documentation for Desfire EV1 and EV2.

Can you please give me the document names?

Best regards,

Mr Ali MAÏGA

Hardware Manager

FDI MATELEC

Route de St Symphorien

85130 Les Landes Genusson

France

Office +33 2 51 61 69 69

Fax +33 2 51 61 69 68

www.fdimatelec.com<http://www.fdimatelec.com/>;

P Pensez Environnement, imprimez seulement si nécessaire. P Think Environment, print only if necessary.

De : jonathaniglesias

Envoyé : jeudi 24 janvier 2019 16:04

À : Ali MAIGA <amaiga@fdimatelec.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>

[Jonathan_Iglesias]

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.

BR

Jonathan