• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 47 subscribers
  • Views 102 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

INA230: VBUS accuracy

Danilo A.
Mastermind 32105 points

Part Number: INA230

Hi Team,

Posting on behalf of our customer.

what is the Vbus accuracy on INA230?

From spec, GBERR shows the 0.3%.

Our VBUS pin connect 3.3V +/-5%.

The MAX tolerance on sensing = (actual voltage ± Vos) × (1 ± GERR) = (3.3*1.05+0.015) × 1.003 = 3.49V

I want to know if my calculate is true or not.

since this Formula reference from other ticket. 

Regards,

Danilo

  • 0
    TI__Mastermind 28975 points

    Hello Danilo,

    The offset voltage is not affected by the gain error, so the actual equation for worst case error from gain and offset would be this:

    MAX tolerance = (actual voltage * (1 ± GERR)) ± Vos = (3.3 * 1.003) + 0.015 = 3.3249V

    Regards,

    Mitch