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.

TIDA-00835: Is the opamp U10A needed (Why not sending directly the signal to the ADS131)

Part Number: TIDA-00835
Other Parts Discussed in Thread: ADS131E08, , ADS131A04, ADS131E04


For one of our customer, we are developping a board that will measure the current and the voltage of a 3-phase motor.

We are using current transformer for sensing the current. We will use the ADS131E08. In the datasheet of the ADC, the output signals from the CT are directly sent to the ADC pins as you can see below:

But in the application note TIDA-00835, an opamp is used between the CT and the ADC:

I don't understand the advantage on doing that? It is for accuracy, for protection, etc. ?

Thank you,

Best Regards