We have a custom reader with PN5180 and properly tuned antenna with Z=18 Ohm according to VNA.
The DPC_CONFIG Register is 0xF9 so that UTVDD is 5 V.
We have a continuous field with the strength of 6 V at a distance of 3 cm.
With this values, the ITVDD should be 261 mA.
With different values of DPC_CONFIG, ITVDD is linear to UTVDD. With a Z of 25 Ohm ITVDD should be minimum 200 mA.
However the current measurement ITVDD, under different loading conditions, is always less than 120 mA.
What could be the reason for this?
