What is the ST25R3916B current draw in Card Emulation or Listener mode?

[dlormand]

I'm considering a ST25R3916B design to emulate a 14443 A&B device and preferably be powered by the field. It's not at all clear from the datasheet what the current draw is when not operating in an Active mode - there's a big gap between 4uA in Initial NFC Target mode and 4mA in Ready mode. It's hard to believe that the device can do all its frame decoding and passive modulation on 4uA.

[Ulysses HERNIOSUS · Accepted solution]

Hi dlormand,

while waiting for an external reader field the current draw is I_NFCT. Once the field arrives the chip moves to ready mode with current I_RD. This move needs to be confirmed by the MCU software. So, while the reader field is present and communication may be ongoing the chip needs to stay in this mode.

BR, Ulysses