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INA220: INA220 circuit || VBUS

Vidhya C
Prodigy 135 points
Part Number: INA220

Hi TI team,

We are using INA220BIDGST current sensor to measure the current of cellular modules. Does VBUS need external power supply for measuring the current? Will the below circuit works? 

  • +1
    Guru 140200 points

    Hi Vidhya,

    this is no supply voltage pin powering anything inside the INA220. The VBUS pin of INA220 allows to measure the VBUS potential. Please carefully read the datasheet Relaxed

    Even if you don't need to measure the VBUS potential, it's helpful to connect the VBUS pin to IN+ or IN-. This prevents the VBUS pin from being floating.

    Kai

  • +1 in reply to kai klaas69
    TI__Expert 4720 points

    Hello all,

    Kai has provided the answer. I will close this thread. Thank you Kai. To specifically answer your question yes your circuit will work but as Kai mentioned it would not hurt to connect Vbus to IN+ or IN-.

    Regards,

    Cas