NFC to I²C Bridge Powered by RF Field

[eleng]

Hi everyone,

I have a question regarding NFC ICs that act as a bridge to I²C devices.

Is there any NFC-to-I²C bridge IC available that:

can be fully powered by the NFC field (RF energy harvesting) and supply my "sensor" (ADC + OPV),

and can communicate with I²C sensors (ADC), configure I2C ICs, etc,

without requiring an additional microcontroller?

I came across the NTP5332, which seems to support NFC Forum Type 5 and mentions an "I²C bridge". However, i am not completely sure whether this chip can act as an ("true") I²C master to communicate with, for example, an external ADC – or whether I would still need a microcontroller in the system. I need to read an I2C ADC and configure other I2C nodes (e.g. GPIO Extender etc). 

So my main questions are:

Can the NTP5332 directly read (and configure) from an I²C slave device (like an ADC)?

Does it include any logic or controller that can generate I²C transactions, or is it just a passive tag with internal I²C access?

If not, is there another NFC IC you would recommend that supports:

external I²C communication as master,

full RF power harvesting (no battery),

and ideally, does not require an external MCU?

Can the harvested energy from the RF field reliably power an ADC and op-amp signal conditioning circuit (low-power), or is an additional energy buffer (e.g., supercap or battery) usually required?
Any suggestions or clarification would be greatly appreciated!

Thanks in advance