AN3178

Implementation

Doc ID 17256 Rev 2

5/11

3

Implementation

To use an off-the-shelf inductor in your design, one option is to design the footprint of an

optional external capacitor, in order to be able to fine-tune the antenna tuning frequency if

needed.

Figure 2.

Possible implementation using an external inductor and an external

tuning capacitor

Refer to The application note AN2972 Designing an antenna for the M24LR64-R dual

interface I²C/RFID device for further details on antenna design and optimization.

M24LRxx

internal tuning

capacitor

Optional

external tuning

capacitor

Inductor

ai15781