Power consumption of NT3H2111 during RF eeprom read/write

[peter_selmer_ga]

Hello.

I am working with the NT3H2111 chip for an embedded system, where we need to write the EEPROM of the NT3H2111 when the internal system power is off. We are designing a small NFC antenna for power and communication, but cannot find precise information about the chips minimum power requirements during RF read/write. 

I have found the following thread: https://community.nxp.com/message/867423 where the power requirements during i2c read/write are discussed. The power requirement, in this case, is 240 uA, but is this the same power requirements when doing an RF read / write?

Thank you for your help, sincerely
Peter Selmer Gade

[IvanRuiz]

Hello,

The IC consumption will be the same either "normally powered" or when powered by energy harvesting.

What is important to keep in mind, is that the RF field provides enough power to NTAG's VCC through VOUT pin (when energy harvested). It is recommended to connect a capacitor on VOUT pin in the range of typically 150 nF up to 220 nF to keep a steady voltage due to RF modulation.

For more information, please refer to chapter 8.6 of datasheet: https://www.nxp.com/docs/en/data-sheet/NT3H2111_2211.pdf

Hope this helps!

Best regards,

Ivan.