ADXRS646-EP Datasheet Figure 6

Reference: Figure 6 of, ADXRS646-EP part datasheet.

We understand, Null Bias is ratio metric to Vratio input.

For Vratio of 6V, Null will be 3V(Typical). But in the graph (Vratio is mentioned as 5V) and Null bias is still 3V.

As per our understanding it should have been 2.5V

                                (Or)

Vratio=5V is a TYPO in datasheet.

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  • +1
    •  Analog Employees 
    on Jun 10, 2021 8:09 PM in reply to EVoyager

    Hi 

    it seems that there is a typo in the Figure 6, thanks for noticing. I will work with our editorial team to correct it. 

    From what I have been able to learn, through review of internal design documentation, there are process variation that causes null bias to shift from ideal, this is normal. At that time, lead customers were asking for improvement linear vibration rejection and nonlinear error and were willing to support this level of variation in the null bias, over normal process variation and temperature.   

    Digital (downstream) calibration has been the most common approach for customers that we have worked with, directly.  You can see an example of how one of our IMUs applies these calibrations, on page 17, of the ADIS16507 datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADIS16507.pdf#page=17

    Regards, 

    Pablo.  

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