ATL431: How to calculate Rsup value

Atsushi Takahashi

Expert 1030 points

Part Number: ATL431

Hi Team,

Could you tell me how to calculate Rsup value?
I couldn't find it in the data sheet.

Best Regards,

over 2 years ago

0 Tony! over 2 years ago

TI__Intellectual 1735 points

Hi Atsushi,

Rsup is determined by how of a load the reference needs to supply. A lower expected load allows for a higher resistor value, saving energy. A higher expected load needs a lower resistor value to allow for the current to be supplied. You can use expected load current along with V=IR to determine an appropriate Rsup resistor value.

-Tony

0 Atsushi Takahashi over 2 years ago in reply to Tony!

Expert 1030 points

Hi Tony,

Thank you for your reply.

I find the following formula from SHUNT_VOLTAGE_REFERENCE_RESISTOR_CALCULATOR.

Is it available for Rsup calculation?

Best Regards,

0 Tony! over 2 years ago in reply to Atsushi Takahashi

TI__Intellectual 1735 points

Hi Atsushi,

Yes it is.

-Tony

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ATL431: How to calculate Rsup value