Ucode I2C matching to 50 ohm ?

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Ucode I2C matching to 50 ohm ?

721 Views
fletort
Contributor I

Hello,

i am really interesting by the Ucode I2C chip for tow reasons :

 - BAP feature

 - Interruption on Reader read operation.

But I am planning to use a 868Mhz ceramic chip already present on my board.

And, i don't know if a matching is available for this chip to match to 50ohm line ?

I found such a matching for another rfid chip from monza in one of their application note.

Is it possible with the ucode chip ?

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Kan_Li
NXP TechSupport
NXP TechSupport

Hi Fabien,

I think you may refer to http://cache.nxp.com/documents/application_note/AN11180.pdf?fsrch=1&sr=4&pageNum=1  and http://cache.nxp.com/documents/application_note/AN11181.pdf?fsrch=1&sr=7&pageNum=1  for details.


Hope that helps,
Have a great day,
Kan

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464 Views
fletort
Contributor I

thnaks i already read these documents. but no information are given for 50ohm matching.

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464 Views
Kan_Li
NXP TechSupport
NXP TechSupport

Hi Fabien,

Have you referred to http://www.nxp.com/documents/application_note/096917_UCODE_G2XM_G2XL_an.zip for details? Please note Ucode I2C impedance is 12.7-j199@915MHz, and this value should also be ok for 868MHz, but if you want to use  50ohm antenna , you have to use a 12.7+j199 to 50ohm Impedance transformation structure between the chip and antenna, for example , a Discrete L-Section Matching Network.


Hope that helps,
Have a great day,
Kan

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Note: If this post answers your question, please click the Correct Answer button. Thank you!
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