The recommended sensor design process is:
- Determine the maximum size inductor that can physically be used in the application, and set the dOUT value to that size. If the sensor is near the edge of a PCB, be sure to include any edge clearance rules from the PCB manufacturing rules.
- Based on the PCB manufacturing rules, set:
- Trace Width and Trace Space to the minimum permitted. This value is commonly between 4 mils (0.1 mm) and 6 mils (0.15 mm).
- Copper thickness; this is commonly 1 oz-cu (approximately 35 µm). Thicker is better.
- Set the Number of Layers to match the number of board layers in the design.
- Set the Capacitance — the range of 300 pF to 2 nF is typically near the optimum unless a specific sensor frequency is needed. Adjust the capacitance as needed if the sensor frequency is not with the device limits.
- Set the number of turns so that the ratio of Din / Dout is > 0.3.
- Export the design into the desired format.