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[SOLVED] Optocoupler minumum input current for low power comsumption

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eiphan

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Hi
I am using opto-coupler EL3H7A-G from everlight. I would like to know how to choose the input resistance to minimum current. It is 5V and Rin is 100Ohm and 40mA for now. I want to use less than 40mA may I know what is minimum current level so that the device power comsumption is minimum.
 

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