I have and ADXL375 Eval board connected to a Adafruit M0 processor board. I am currently using SPI communication with a speed of 4MHz. I see noise on the accel around +/- 1G at 3200 ODR and +/- .1G at 100 ODR. The spec suggests this should be .28G and .05G respectively (sqrt3200*.005, sqrt100*.005). What could be the possible causes of the extra noise I am seeing? could a varying input voltage cause this?
Thank you for looking.