Dear TI,
I work on the ldc1000evm board and i use a circular coil of 1-layer PCB with 200 turns ( Dmax = 112 mm Dmin = 15 mm ) with a Ctank about 470pF. I measured the resonant impedance Rp using an impedance analyzer :
fsensormax = 160.034 kHz
fsensormin = 145.032 kHz
Rpmax = 11.12 kOhms
Rpmin = 10.03 kOhms
That why I used these parameters :
i don't understand why i have noise on Rp and Inductance measure. Can you help me ?
Thanks,