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RF430FRL152H: Minimal circuit requirement

Yongkuk Lee
Prodigy 10 points
Part Number: RF430FRL152H

Hello,

I'm developing miniaturized NFC based pH sensor using RF430FRL152H.

I found the application circuit diagram in its datasheet, but it seems too many components are required compared to other manufacturers' NFC transponder chips.

What are minimum components to properly operate RF430FRL152H? (e.g., C3 may not be necessary if there is no battery. VDD2X is not necessary for my sensor). My device will be battery-free device (no battery connection at all).

Thanks you for your help in advance!  

  • 0
    TI__Mastermind 18265 points

    Hello,

    there is an application note "Battery-Less NFC/RFID Temperature Sensing Patch" which uses very less components:

    www.ti.com/.../sloa212a.pdf

    I would not recommend leaving any other cap than the VDDB cap because of retroactive effects.

    As far as I understand you will not use the analog interface and so you want to leave the VDD2X cap and Cfly. Because the primary use is with the ADC, we never used it in that way. This is up to your trial if the circuit will work stable for you.

    I good overview of all the voltages can be found in the "Technical Reference Guide" page 44 figure 2-1:

    http://www.ti.com/lit/ug/slau506/slau506.pdf

    Best regards,

    Helfried