Hi Expert,
For TIC10024-Q1, does it have hysteresis function for inputs signals? I don't read related in datasheet. I think it should have. Could you please help to verify? Thanks.
BR,
Elec Cheng
Hi Elec,
No, there is no hysteresis and the part does not really operate in a way to make hysteresis relevant because there is not a dedicated comparator for each input pin. Hysteresis is an analog function that is needed when there is a dedicated comparator that is continuously monitoring an input voltage to prevent small fluctuations on a voltage that is very close to the threshold from causing the comparator output to rapidly change state.
Instead the device will sequentially MUX each enabled input to the device's single comparator, one at a time, to sample the voltage and determine if the voltage is above or below the configured threshold level. Once the measurement is complete for an input pin, the devices switches in another input pin and makes a new measurement. This cycle repeats this for all other enabled input pins.
The fastest this cycle can complete is once every 2ms, even if only a single input pin is enabled. Because of this process, a new comparator measurement is always needed and the comparator is not used in an analog fashion that will continuously monitor a single input that would require hysteresis.
The device does have a detection filter feature that can require multiple consecutive measurements to be of the same value to indicate a state change. This effectively performs a similar feature as analog hysteresis by filtering out the switching noise and ringing on a switch that has changed state.
Regards,
Jonathan
