TRF7970A: Use of trf7970

Hello,

please see the following document which describes the use of the direct modes for the TRF7970A:

http://www.ti.com/lit/pdf/sloa214

The communication distance that you can achieve depends a lot of the tag used, especial the ISO Standard, size of the antenna and the power consumption. Also the size of the reader antenna and the correct adjustment of the matching circuit will have an impact.

As additional information please have a look to the "Antenna Design Guide":

http://www.ti.com/lit/pdf/sloa241

Best Regards,

Helfried