Other Parts Discussed in Thread: DRV5032
We've been working with the DRV5053 in our product, we've successfully qualified it on the bench, but have been going back to the data we've been accumulating on our manufacturing line to ensure that at volume our firmware algorithms will remain robust with all the product that we are producing.
In short, we are inducing a magnetic field incident on the DRV5053 and taking a set of measurements with our main processor, and then averaging those as a one-point calibration value which we can utilize in the field to make up for the vast sensitivity range specified. However, from the distribution of the values we're seeing over the past ~4k samples, there is ~1% of parts that would statistically fall outside of the expected sensitivity range per the datasheet. Below is a histogram of the distribution we are seeing, including the secondary distribution well above our expected range of values.
These values are repeatable, and even swapping subassemblies with different mechanical parts (and new magnets) has not been able to sway these units within what should be expected based on the peak of our distribution and the tolerance of sensitivity on the datasheet.
Is there something to attribute this wider than expected tolerance to? Are these defective parts?