I have a sensor that draws 20 mA for 20 µs and draws 60 µA sleep current for the remaining time. The period can be 5 minutes, 10 minutes, or 15 minutes. Can someone help me calculate the average current for each case?

 

Calculate ∫Idt over the period and divide by the length of the period.
As the current isn't continuously varying, ∫Idt is simply I*t

 

It's [(20mA*20µs + 60µA*period) / period]