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     i have problem with adxl213, when  ADXL213 interface with pic30f3011 for tilt angle measurement as per application note and datasheet, but i don't get maximum or minimum angle maximum reading is 76 degree i need it to 90 degree, so plz help me ,

plz find attached schematic and value of componets

  • Without knowing more, I would suggest that this is likely related to offset and sensitivity differences from the typical values stated in the datasheet.  Have you factored into your calculations these error sources?  A simple 2 point calibration +/- 90 degrees would provide a sensitivity and offset correction values and might be sufficient depending on the degree of accuracy needed.  If you need more help, can you provide the data used to calculate the angle?

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