Little bit more precise answer could be: there is no way how to drive the 13.56 MHz field from nRF52 chip so doing NFC reader does not make sense. On the bright side: there are cheap ICs which will do this job for you so you will only pay by small additional cost + space on PCB and power if you really want this.
Little bit more precise answer could be: there is no way how to drive the 13.56 MHz field from nRF52 chip so doing NFC reader does not make sense. On the bright side: there are cheap ICs which will do this job for you so you will only pay by small additional cost + space on PCB and power if you really want this.
I met NXP, ST Microelectronics and AMS in practice, I know that Infineon and Samsung Semiconductor have them in portfolio as well (no practical experience). If you want something really cheap I suppose EM Microelectronic (Electro Marin) will have something to offer as well. But if you are in this business you already have your sources and if you are not you better find some help or consultancy;)
Can you suggest any particular chip which is cheap and have the smallest amount external parts. I am considering between NXP PN532 and AS3909/AS3910 but maybe you have better option...
Hi Bartek, I'm pure SW developer and my knowledge of HW design is limited so I cannot judge these items from layout/PCB real estate/BOM cost point of view. I'd expect that for reader this isn't such a problem because HF (13.56MHz) contactless (NFC if you want) is such specific discipline that you need real expert to produce at least so-so tuning and then you simply take his recommendation (because saving few cents on BOM or similar is not worth months of learning and discovering completely new vendor/component). At least this is what I've seen during my professional career in smart card business;)
