How to confirm the value of internal pull-up in ADUC848

Hello,

My customer wants to get the value of internal pull-up resistors in ADUC848.

As you know, SCLK and SDATA pin in ADUC848 have a weak internal pull-up.

But I can't find the value of these weak internal pull-up resistors.

Would you let me know the value of these weak internal pull-up in SCLK and SDATA pins?

Or would you let me know how to calculate these values of pull-up using patameters in ADUC848 datasheet?

Please advise me.

If you have any questions,please let me know.

Regards,

Se-woong

ADUC845_847_848.pdf
  • 0
    •  Analog Employees 
    on Jun 25, 2015 6:14 AM

    This pull-ups are not qualified and can differ from part to part in a relative wide range. To measure the approx. value you can connect a additional resistor to ground and measure the current through it and then calculate the series resistor representing the on-chip pull-up.