ajn96/iSensor-SPI-Buffer

Add additional decoupling for the IMU

juchong opened this issue · 3 comments

juchong commented

Resetting the IMU causes VDD to fluctuate significantly. More decoupling should be added to lessen this behavior.
image

ajn96 commented

@juchong

I set up Vdd monitoring and use it to compensate the temp sensor reading. This makes the temp sensor fairly noisy, but it now no longer shifts when the supply voltage shifts.

imu_reset

ajn96 commented

Added a decimation filter to the temp sensor output to make it look a little cleaner. Can still see the noise from a messy supply being multiplied into the temp measurement, but it's not as bad.
temp filtering

ajn96 commented

This has been incorporated into the rev C board design (100 puf caps decoupling IMU supply)