• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 47 subscribers
  • Views 763 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.

AMC1301: Offset

Jean Germain
Prodigy 20 points
Part Number: AMC1301 
I use in our project an insulated amplifier reference AMC1301 from Texas.
We have an important offset related to our scheme, in fact we perform a voltage measurement via a divider bridge.
I bought the evaluation board "AMC1301EVM" VINN input is not connected to the GND1 of the power supply and this has the effect of removing the offset.
I would like to know that it is the recommendation of Texas concerning this type of use knowing that in the data scheet it gives like scheme VINN connected to the GND1.
  • 0
    TI__Guru**** 181231 points
    Hi Jean!

    Welcome to our e2e forum! You are correct in that the AMC1301EVM does not tie VINN directly to GND1, since we don't know the exact configuration each customer would like to use with the evaluation module, we left the hardware flexible. The important thing is restricting the input common mode voltage. If you can provide more detail on your particular setup, we may be able to help you determine where the offset is coming from.
  • 0 in reply to Tom Hendrick
    Prodigy 20 points

    Hi Tom!

    Thank you for your answer

    I think I have found the solution to my problem in the component datasheet

    Paragraph 10.2.2 Isolated Voltage Sensing

    Thank you for your help