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.

INA186: Bidirectional Current Sensing Application

Part Number: INA186

Hello,

We are looking for a current sense amp for an application requiring bi directional current sensing. The incoming signal can be -10 to +10VDC or -30 to 30VAC 50/60 Hz. This makes INA186 look like a good candidate. This device has a reference input, which I believe we would feed Vs/2. The supply voltage Vs would be 5V or 3.3V. I believe this device is unipolar and also due to the reference, there would be no need for negative voltage. Is this correct? Thank you!


Regards,

Garret

  • Garret,

    How've you been?

    I'm having trouble visualizing the signal chain on the front end. Is the customer planning to implement on the high side or the low side? They are going to have a challenge implementing on the high side, as the 30VAC will cause problems with the common mode of the signal (the -10V may as well dependent on which amplifier they choose. For example, the maximum negative common mode voltage the INA186 can withstand is -0.2V). The customer would need to make sure that their design maintains common mode requirements to guarantee linear output. Can you share a bit more about their load line setup here?