Hello I whant to start using CR95HF. I a have a question about antenna for it.

[AB.19]

If I one to use Molex 1462360001 (it's antenna for NFC with Inductor @13.56MHz 2.11uH), how I need to modifi output block for CR95HF. Because how I can see STM boards use antenna with inductor 430 nH.

Molex 1462360001 datasheet https://www.molex.com/pdm_docs/ps/1462360001-PS.pdf

[Brian TIDAL]

​Hi,

The application note AN3394 gives comprehensive information about antenna and impedance matching for the CR95HF reader: https://www.st.com/content/ccc/resource/technical/document/application_note/33/ae/18/cb/dd/0f/46/96/DM00027198.pdf/files/DM00027198.pdf/jcr:content/translations/en.DM00027198.pdf

Also, feel free to share your schematics and gerber with me (click on my name and then click on message), I will ask our experts to review the various values for the matching network.

Let me know if you have extra questions regarding AN3394 information

Rgds

Bruno

[Brian TIDAL · Accepted solution]

Hi,

in addition to my previous answer, I also recommend the reading of AN4327 (https://www.st.com/content/ccc/resource/technical/document/application_note/8e/99/77/a7/4f/58/4d/d6/DM00089926.pdf/files/DM00089926.pdf/jcr:content/translations/en.DM00089926.pdf)

Rgds

BT

[AB.19]

Thank you for answers!

But I chosen different way and make my own antenna, and it work great!

[AB.19]

Thank you for answers!

But I chosen different way and make my own antenna, and it work great!