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(ADuM140E1)Supply current.

Hi !

Q1)

Our customer want to know the supply current.

I already asked about this and you gave me ADuM142's spread sheet.

(ADuM140)Supply current with OOK. 

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

ADuM142typicalsupplycurrentwithdutycycleNov22015.xlsx
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  • 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

     

Reply
  • 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

     

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