Hello there, one of my customers has designed in the ADXRS646 inertial module.

Find below an excerpt of the schematics. It looks like there is a small mistake in the design.

Looking at the RATEOUT signal: 6V/(11.5K+17.4K) = 207uA current drive.

On the other hand, the datasheet shows the curent drive 200uA. see below

Please advise if the 7uA that exceeds the current drive will damage the chip?





There are several hundreds units already deployed in the field.



  • 0
    •  Analog Employees 
    on Sep 9, 2015 6:00 PM

    I would not expect this to be a reliability risk. It could impact the range of the sensor's output, as it might not be able to reach the maximum output voltage in cases where the maximum output current is very close to the 200uA limit. I suspect that they are validating their dynamic range in their calibration process, prior to deploying their IMUs, but that might be something that you might want to ask them about to be sure.  Does that help?  If so, our admins would greatly appreciate you offer a Correct Answer closure if we have earned it.  If we have not, we look forward to further clarification.