MPXM2102AS datasheet(145/670 Pages) MOTOROLA

145 / 670 page

2–109

Motorola Sensor Device Data

www.motorola.com/semiconductors

Accelerometer Glossary of Terms

Acceleration

Change in velocity per unit time.

Acceleration Vector

Vector describing the net acceleration acting upon the device.

Frequency Bandwidth

The accelerometer output frequency range.

A unit of acceleration equal to the average force of gravity occurring at the earth’s surface.

A g is approximately equal to 32.17 ft/s2 or 9.807 m/s2.

Nonlinearity

The maximum deviation of the accelerometer output from a point–to–point straight line

fitted to a plot of acceleration vs. output voltage. This is determined as the percentage of

the full–scale output (FSO) voltage at full–scale acceleration (40g).

Ratiometric

The variation of the accelerometer’s output offset and sensitivity linearly proportional to

the variation of the power supply voltage.

Sensitivity

The change in output voltage per unit g of acceleration applied. This is specified in mV/g.

Sensitive Axis

The most sensitive axis of the accelerometer. On the DIP package, acceleration is in the

direction perpendicular to the top of the package (positive acceleration going into the

device). On the SIP package, acceleration is in the direction perpendicular to the pins.

Transverse Acceleration

Any acceleration applied 90

° to the axis of sensitivity.

Transverse Sensitivity Error

The percentage of a transverse acceleration that appears at the output. For example, if

the transverse sensitivity is 1%, then a +40 g transverse acceleration will cause a 0.4 g

signal to appear on the output. Transverse sensitivity can result from sensitivity of the

g–cell to transverse forces.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

MPXM2102AS датащи(PDF) 145 Page - Motorola, Inc