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INA211: how much is the output current capability of INA211?

Aki Li
Genius 9235 points
Part Number: INA211

Customer would like to understand the max output current capability of INA211, so that they can select the resistor values for the voltage divider. Could you please help check for it? Thank you.

  • 0
    TI__Mastermind 19485 points

    Aki,

    Thanks for using E2E. Like most amplifiers, the maximum output current for this device is a function of output voltage, supply voltage, and temperature, and is displayed in the claw curves of figure 10. I have copied this figure from the datasheet below:

    To help understand these curves better, we have a TI precision labs that walks through the interpretation of these curves here. The portion specifically on claw curves begins @10:44 of the video

  • 0 in reply to Carolus Andrews
    Guru 48395 points

    Well that figure 10 is sure confusing, why are there 5 curves on the top and the expected 3 on the bottom? 

    As I understand it, these are a small set of single lot parts tested, so perhaps an overprocess guardband of maybe 20% down would be useful. Not much of a RR out with any current here but say you wanted a for sure swing to 0.5V off the rails, at 25C looks to be no more than +/-2mA you can count on. Keep in mind these curves are hard non-linearity so you need to stay away from them if you want a linear output swing.