PSOC4 Capsense is an incremental improvement over the PSOC5LP Capsense due to which there will be difference in the proximity sensing range.
You can mitigate the noise by using a ground loop surrounding the proximity loop on the PCB.
Any specific reason you are considering using PSOC5LP over PSOC4?
Thank you for this information. I found some ways to get a bit improvement, but not in the range I liked to achieve. So I understand that PSOC4 would be the better solution for me.
The proximity detection is based on single wire, so I have no way to shield on PCB to improve range.
The reason to prefer PSOC5 over PSOC4 is the fact that the CY8CKIT-059 provides all I need without extra effort. I use this in a "mobile" application witch supplies the kit using USB Powerbank as cheap of-the-shelf solution.