AMC3301: How to use correctly?

Lucas Sollberger

Part Number: AMC3301

Hello, I am trying to use the AMC3301 to measure currents and voltages. I know that the AMC3301 is not optimized to measure voltages but I relied on the following guide to perform the compensation calculations. www.ti.com/.../sbar013

I assembled the circuit as shown in the image below. I am having problems and I don't understand why. Could you tell me if the circuit is correctly set up? I need to measure a DC voltage up to 200V.

Thank you.

AMC_3301.tsc

over 3 years ago

0 kai klaas69 over 3 years ago

Guru 140200 points

Hi Lucas,

like this?

lucas_AMC3301.TSC

Kai

0 Alexander Smith over 3 years ago in reply to kai klaas69

TI__Guru 55062 points

Hi Lucas,

I believe there was an issue with the GND1 jumper connected to the HLDOout capacitors that was causing the errors. Re-drawing that portion of the circuit resolved the errors and the circuit simulates as desired. Please see attached.

As a reminder, the analog parameters are not guaranteed for input voltages between 250mV and 280mV, however the device will still output with accuracy similar to the linear region.

If your design will be tested for radiated emissions (EMI), please consult this document for ferrite bead/common-mode choke selection and layout guidance: https://www.ti.com/lit/an/sbaa515/sbaa515.pdf

3175.AMC_3301.tsc

0 Lucas Sollberger over 3 years ago in reply to Alexander Smith

Prodigy 10 points

Hi Alexander,

I designed the pcb as found in the TINA file as it was working fine for me, but I think I had some issues. In the course of these days I will be reviewing the pcb and I will tell you how it went or if I had problems.

On the other hand, I'm not worried about EMI emissions, I can remove the ferrite bead / common-mode choke, right?

Thanks a lot.

0 Alexander Smith over 3 years ago in reply to Lucas Sollberger

TI__Guru 55062 points

Hi Lucas,

Yes, you can remove the ferrite bead / common-mode choke. Please let me know if you have additional questions.

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AMC3301: How to use correctly?