mm9z1_638 current accuracy is out of 1% requirement

[a852013777]

Hi Nxp partner 

After we perform AN12301 calibration guide, we record the current reading from mm9z1_638. We found there are 3 to 5 reading is over our accuracy 1% requirement. Do you have any Low pass filter from software or hardware? How to determine the low pass cofficient?Do you reference guideline?

[TomasVaverka]

Hi Mike,

Looking at the data, it seems there is some periodic lower reading, where is this coming from? Is this from the test equipment or SW?

Seems this periodic event is causing the issue.

Best regards,

Tomas

[a852013777]

Hi Tomas

Thanks, we chagne another electrical current source. the fail condition was fixed.

but we performed the 6A accuradcy can't meet +/-1%, The noise is about  100mA . Do you have suggestion reduce the 100mA noise ? or the 100mA noise is acceptable.

Br,

Mike  Liang