Dear all,
Are there EMS and EMI test results with sensing circuit?
I concern about influence of noise of this device and LC circuit.
Best regards,
Hello Takao-san,
The EMI results will vary depending on the sensor characteristics (coil diameter, current drive setting, etc) and the mechanics of the whole system (metal shielding, stackup, etc).
For example, we've done a test with the LDC1614 using external muxes to achieve 16 sensors, each with diameter of 16mm for a stainless steel keypad demo.
The metal is 0.6mm stainless steel separated from the sensors by a distance 0.4mm.
The EMI results are shown below:
You can see that given this system configuration we pass the CISPR 22 Radiated Emissions Class B spec with almost 20dB of margin across the whole frequency spectrum.
To get results specific to your system, we recommend to prototype the whole system, but you can have confidence that the LDC1614 family of products are a low noise solution.
Regards,
Luke
