ST25R3916B - Resistive Divider RF input

[Moritz_]

Hi,

is it possible to use the ST25R3916B with an resisitve divider (instead of the capacitive divider) at the RF Inputs to limit the input voltage to a safe value.

In case this is possible, is an additional DC-Block needed?

I am driving a purely resistive load with the RF Outputs.

Thank you very much. 

Moritz

[Travis Palmer · Accepted solution]

Hi,

The chip is biasing the input signal (sinus) coming from the antenna using AGD voltage.

It means that the sinus is DC biased by ~1.5V. Therefore the Antenna needs to be DC de-coupled from the antenna.

All the internal filters are designed in a way to operate with this proposed capacitiv voltage divider.

A resisitve voltage divider is not recommended and operation is not guaranteed.  

BR Travis

[Moritz_]

Hi Travis,

thank you very much.

Kind regards

Moritz