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Is the internal reference voltage of the ADuM6212 1.225V?

Category: Datasheet/Specs
Product Number: ADuM6212

Hello.

I have questions about ADuM6212.

The internal reference of the ADuM6212 is listed as 1.25V, but the VISO formula is 1.225V.

Is the internal reference voltage of the ADuM6212 1.225V?
Also, does the internal reference voltage vary from 1.225V depending on temperature and other factors?

Best regards,

  • Hello miky,

    The internal reference for the ADuM6212 is supposed to be 1.25V, and it should be 1.25V in the Viso formula. In regards to it being affected by temperature, the PWM control signal has a 20% margin to account for dissipation of power between regular and maximum temperature to account for any power lost within the temperature variation.

    Regards,

    amitmadan

  • Hello ,

    Thank you for the reply.

    The reference voltage in equation (1) on p. 19 of the ADuM6212 data sheet (Rev. D) is 1.225V.

    Revision History also shows evidence that equation (1) was changed in RevB of the data sheet.

    Is the reference voltage in equation (1) 1.225V or 1.25V?

    Is the 1.225V in equation (1) on the data sheet a mistake?

    Best regards,

  • Hi miky,

    The reference voltage is meant to be 1.25V in equation(1). The datasheet is currently being sent for updates to correct this value. If you have any further questions, please let us know!

    Best,

    amitmadan

  • Hi,  

    Thank you for the reply.

    I have more questions about ADuM6212.

    How much does the reference voltage of the ADuM6212 vary from 1.25V?

    What are the maximum and minimum values?

    Best regards,

    miky

  • Hi miky,

    The reference voltage is meant to match up to the 1.25V. You can focus on the Viso range to meet that refence voltage value. The margin for Viso is 20% to cover any temperature variations. Based off this, I advise to have your refence voltage within this same range to avoid any potential issues: between 1V and 1.5V.

    Regards,

    amitmadan