Hi Shota, In a system level, the drift in the LED current due to temperature will be insignificant as the drift in the intensity of the LED will be huge across temperature. So, drift of LED's intensity should be of more concern. We don't have any feedback control settings for LED current. For 2b, I am assuming that customer wanted to know if there is any internal mode that sets the LED current to 0 in absence of photodiode. If yes, then there is no such control that automatically does that. However we have internal diagnostics mode, whose output can be read by the external MCU and updon detection of errors ( such as absence of photodiode), the LED current can be programmed by the MCU to be 0. Regards, Prabin.
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