I plan to do a PCB with an MCU and it will include one NCF reader IC + PCB antenna in the same board. I have pre-selected one of the following ICs:
- ST CR95HF: https://www.st.com/content/ccc/resource/technical/document/datasheet/d2/cc/cb/f6/7c/63/48/75/DM00025644.pdf/files/DM00025644.pdf/jcr:content/translations/en.DM00025644.pdf
Both ICs support ISO-14443 and ISO-15693. According to Wikipedia, ISO-15693 specify a maximum read distance of 1 to 1.5 meters.
My application is an electronic lock for doors and, for security reasons, I would like my NFC reader IC could read the tags only within a little distance range, at around 15 centimeters (~6 inches) of maximum distance. Is this possible?
My board is to be an active NFC reader that will read and external passive tag.
Or will I need another solution for NFC reader IC to reach such maximum distance?
EDIT: I want the reader IC to be able to read/write external tags, and also with the smartphone via NFC.