I have bought a DS3231M Real time clock. From the datasheet, one can see that when the RTC is powered from VCC with 3.63V, the max current I_CCA is 200uA when I2C is active, and I_CCS 130uA when I2C is inactive. These numbers are supposed to include the temperature conversion current, as it says in the datasheet. However, it also mentions a Temperature Conversion Current I_CCSCONV that reaches up to 575uA
When powered from the battery, the max current with Vbat=3.63V is I_BATA 70uA with I2C active, and I_BATT 3uA with I2C inactive. Note 4 also says that it includes the average temperature conversion current.
However one can also find to the battery characteristics a temperature conversion current I_BATC of 575uA maximum.
So, my question is how can I know the average current consumption when powered from VCC and when powered from Vbat? Also, it seems that if I have one power source, it is better to power it only from VBAT.
