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(ADuM12xN)How to calculate the supply current when each channel's duty and frequency are not same.

donadona999s
on Jan 28, 2019

Hi !

I already asked ADuM14x Power supply at past.

https://ez.analog.com/interface-isolation/f/q-a/87044/adum14x-how-to-calculate-the-supply-current-when-each-channel-s-duty-and-frequency-are-not-same

Can you give us same kind of power supply formulas for ADuM12xN?

We want to know this because one of our customer is thinking to change  ADuM321x to ADuM12xN.

Best regards

Kawa

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    •  Analog Employees 
    on Jan 31, 2019 3:49 AM over 1 year ago in reply to donadona999s

    Hi Kawa:

    For ADuM120N:

    IDD1 = IDD1(Q) + (2.8mA * D_A + 0.01mA/Mbps * F_A) + (2.8mA * D_B + 0.01mA/Mbps * F_B)

    IDD2 = IDD2(Q) + (0.02mA/Mbps * F_A)+ (0.02mA/Mbps * F_B)

    For ADuM121N:

    IDD1 = IDD1(Q) + (2.8mA * D_B + 0.01mA/Mbps * F_B) +(0.02mA/Mbps * F_A)+

    IDD2 = IDD2(Q) + (0.02mA/Mbps * F_B)+ (3.4mA * D_A + 0.01mA/Mbps * F_A)

    The formula is similar with ADuM14x because they are using the same coil architecture. the difference is number of channels and directions.

    Regards

    Chris

     

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