Why is the SmartSense (Full Auto-Tune) limited to 45 pF of sensor capacitance that can be supported?

NaMo_1534561 · ‎Apr 12, 2019

Hello,

Why is the SmartSense (Full Auto-Tune) limited to 45pF of sensor capacitance that can be supported?

I refer the PsoC4/PsoC6 Capsense design guide as below.

PSoC® 4, PSoC 6 MCU CapSense® Design Guide, Doc. No. 001-85951 Rev. *U

5.3 Manual Tuning

https://www.cypress.com/file/46081/download

Hari · ‎Apr 15, 2019

Hello

For a parasitic capacitance value of 100pF, smartsense will not be able to tune. Manual tuning is the reliable and better option.

However, to save time, you can first set the sensor to smartsense and check the values such as sense clock frequency, scan resolution and modulator IDAC. These values can be applied in the manual tuning setting in order to tune the sensor.

Do let us know in case of any other query.

Thanks and regards

Harigovind

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Why is the SmartSense (Full Auto-Tune) limited to 45 pF of sensor capacitance that can be supported?

Why is the SmartSense (Full Auto-Tune) limited to 45 pF of sensor capacitance that can be supported?

Re: Why is the SmartSense (Full Auto-Tune) limited to 45 pF of sensor capacitance that can be supported?