John Giordano

MMA7260 dynamic vs. static acceleration

Discussion created by John Giordano on Feb 23, 2011
Latest reply on Feb 24, 2011 by John Giordano

I am using the MMA7260 accelerometer located on the DEMOJM evaluation board.

The volatge limits go from .85 to 2.45 volts with 1.65 volts at the 0g point.

If I shake the accelerometer about the x-acis then I see the voltage swings from .85 to 2.45 volts.

So far so good.

Now I tilt the board 90 degress to each side of horizontal and the voltage does change in the correct direction BUT

it never goes to the limits of .85 and 2.45. It stops short by about .3 volts.

Does anyone know why?

Am I doing something wrong?