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Original question:

<1uA measurement

INA190: Vcm >5kV use-case

Hideki Hayashi1
Genius 9040 points
Part Number: INA190
Other Parts Discussed in Thread: DRV421, DRV425

Hi team,

Per original question, INA190 has been promoted and its accuracy is acceptable.

But common mode voltage is about 5kV, do we have solution for this use case? Only TMCS family support it?

Regards,

Hayashi

  • 0
    TI__Expert 8855 points

    Hello Hayashi,

    We don't have a solution for 5kV using either TMCS or Shunt-Based current sensing, the best solution we have for sensing current at 5kV will be using fluxgate devices such as the DRV421 and DRV425. Here is a reference design that uses the DRV425 for current sensing on a busbar, and here is a link to the DRV421. 

    Let me know if you have any more questions about these devices,

    Levi DeVries