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using INA260 for measuring negative voltages (-12 V)

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Replies: 2

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Part Number: INA260

I would like to measure the current of a negative voltage (-12 V) coming from an ATX power supply.
I found an earlier answer on this forum for measuring the current of -5 V, but when applying this solution to -12 V, this would violate the maximum supply voltage VS.

  • The earlier answer can be found here (how to cope with -5 V):
    https://e2e.ti.com/support/amplifiers/f/14/t/705892

    The best guess I have is below schematic using a positive linear regulator to lower the supply voltage from GND to -7 V (effectively giving +5 V between VS and GND of INA260):

  • In reply to Wytze Hoogkamp:

    Hello Wytze,

    Thanks for considering to use Texas Instruments.  I think what you have would work.  However, you might also consider the alternative of using a resistor and a ~5V zener diode to power the INA260, like shown below.

    Best Regards,

    Patrick Simmons, TI Sensing Products Applications Support

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    TI makes no warranties and assumes no liability for applications assistance or customer product design. You are fully responsible for all design decisions and engineering with regard to your products, including decisions relating to application of TI products. By providing technical information, TI does not intend to offer or provide engineering services or advice concerning your designs.

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