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Hi !

Q1)

Our customer want to know the supply current.

Can you give me the same thing for ADuM140?

Q2)

Also , ADI's newest iCoupler series is very difficult to calculate the supply power.

Do you have any plan to update the datasheet or make a new application note for this?

Best regards

Kawa

• Hi Brian-san

We have not receive these questions from our customer yet.

But I think they will ask this to us in future.

So I am not hurrying that much but if you can help us about this, the information will be very useful.

Best regards

Kawa

• Kawa-san: I will discuss with the designer and respond back.

Regards, Brian

• Hi Brian-san

I understood what you wrote and I think your information is very useful.

If I have more questions about this , I will ask you later .

Best regards

Kawa

• Kawa-san:

I will show you here the formula for supply current from the designer.  I will be away on vacation for 1 week, but since you say it is not urgent perhaps you may ask your follow up questions when I return after August 10th.

Regards, Brian

 ADuM14x IDD1 Calculation: IDD1 = IDD1(Q) + num_of_in_vdd1*(2.8mA*D + 0.01mA/Mbps*Mbps ) + num_of_out_vdd1* 0.02mA/Mbps*Mbps ADuM14x IDD2 Calculation: IDD2 = IDD2(Q) + num_of_in_vdd2*(3.4mA*D + 0.01mA/Mbps*Mbps ) + num_of_out_vdd2 * 0.02mA/Mbps*Mbps where 2.8mA = continuous oscillator on current of top coil where 3.4mA = continuous oscillator on current of bottom coil D = oscillator duty cycle IDDI(D) = 0.01mA/Mbps = dynamic input current IDDO(D) = 0.02mA/Mbps = dynamic output current
 Variables Definition ADuM140 ADuM142 Num_of_in_vdd1 num of input on VDD1 side 4 2 Num_of_out_vdd1 num of output on VDD1 side 0 2 Num_of_in_vdd2 num of input on VDD2 side 0 2 Num_of_out_vdd2: num of output on VDD2 side 4 2