How do you find/tune the value of Imod in CapSense? Can it be modified with the tuner?

[JuRu_3481966]

I am working with the PSoC 4000s Prototyping Kit and want to convert the RawCount readings from CapSense back to capacitance values. Using the given formula requires a knowledge of the Imod value, which I cannot find. Any help is much appreciated!

[RyanZhao · Accepted solution]

Imod is sourced from the internal IDAC. In CapSense Component configuration GUI, you can configure Modulator IDAC and Compensation IDAC manually. If you are reading AN85951, Table 3-1 shows the Imod description. And for CapSense CSD v3.x/4.x/5.x, the unit of IDAC is 2.4uA/bit by default.

Thanks,

Ryan