I work on a project with this IC and as I built my circuit I have some questions:
For first here is the schematic:
I tried to calculate all the necessary data, but the Rdem_in parameter is not present in any document.
Is this changeable with registers or is this a fix value?
- As I measured the TX1 pin it is okay. The 125kHz signal is there (1)
After the capacitor (2)
Directly before the coil I measured the next. I assume that I got it because of the coil. So from my opinnion it should be okay. (3):
Unfortunately I have no idea why I got this.
And as I see, because of this I have problem with the output sine signal as well (4):
As I measured these two signals:
Does anybody have any idea what I make wrong?
Because right now I have no more idea.