CMA3000-D0X Datasheet, PDF (30/35 Pages) VTI technologies – 3-axis accelerometer

CMA3000-D0X Series
Equation 10
Cross_Z = ±
S_ZX ² + S_ZY ² _⋅100%,
S_Z
where S_ZX is Z-axis sensitivity to X-axis acceleration [Count/g], S_ZY is Z-axis sensitivity to Y-axis
acceleration [Count/g] and S_Z is sensitivity of Z-axis [Count/g].
Cross-axis sensitivity of CMA3000 family is measured in centrifuge over specified measurement
range during qualification. Correct mounting position of component is important during the
measurement of cross-axis sensitivity.
8.7 Turn-on time
Turn-on time is the time when the last of one X, Y, Z axis output readings stabilizes into its final
value after XRESET is pulled high. The final value limits in turn-on time measurements is defined to
be ±1 % of the sensor’s full scale measuring range (for example for CMA3000-D01 ±2g →
FS = 2 g). Turn-on time definition for Z-axis is presented in Figure 23 below.
Acceleration
CMA3000
Z-axis output
Turn on time
Figure 23. Turn-on time definition for one axis.
Supply voltage reaches the
minimum required level
→ CMA3000 starts
CMA3000 output
inside ±1% FS
limits
Time scale
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