SCA3100-D04 VTI Technologies, SCA3100-D04 Datasheet - Page 37

• Manufacturer Part Number: SCA3100-D04
• Description: ACCELEROMETER 3-AXIS +/-2G SPI
• Manufacturer: VTI Technologies

Specifications of SCA3100-D04

• Axis: X, Y, Z
• Acceleration Range: ±2g
• Sensitivity: 900 counts/g
• Voltage - Supply: 3 V ~ 3.6 V
• Output Type: Digital
• Bandwidth: 55Hz
• Interface: SPI
• Mounting Type: Surface Mount
• Package / Case: 12-SMD
• For Use With: 551-1061 - EVAL BOARD ACCELEROMETER 3-AXIS551-1056 - KIT DEMO ACCELEROMETER SCA3100
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 551-1055-2

8.2 Sensitivity
8.2.1
8.2.2
VTI Technologies Oy
www.vti.fi
Sensitivity calibration error
Sensitivity temperature error
During sensitivity calibration, the sensor is placed in ±1 g positions having one of the sensor’s
measuring axis at a time parallel to the earth’s gravitation, see Figure 21.
Sensitivity is calculated by
Equation 4
where Sens
reading [counts] in +1 g position and Output
position.
Sensitivity calibration error is the difference between sensor’s measured sensitivity and the nominal
sensitivity at room temperature conditions. Error is calculated by
Equation 5
where Sens
sensitivity [counts/g] at room temperature conditions and Sens is sensor’s nominal sensitivity
[counts/g].
Sensitivity temperature error is the difference between sensor’s sensitivity at different temperatures
and the calibrated sensitivity. Error is calculated by
Equation 6
where Sens
axis@T
measured Y-axis sensitivity [counts/g] at room temperature RT.
Sens
Sens
Sens
Pin #1
Figure
is sensor’s measured Y-axis sensitivity [counts/g] at temperature T and Sens
Y
Y
Y
−
−
−
axis
axisCalibE
axisTempEr
21.
=
Y-axisTempEr@T
Y-axisCalibEr
Y-axis
SCA3000 positions for Y-axis sensitivity measurement.
Output
r
@
is sensor’s Y-axis sensitivity in [counts/g], Output
=
T
Y-axis in -1 g
position
X
Sens
=
is sensor’s Y-axis sensitivity calibration error in [%], Sens
Y
Sens
−
is sensor’s Y-axis sensitivity temperature error in [%] in temperature T, Sens
axis
Y
Doc.Nr. 8257300A.07
−
Sens
@
axis
Y
+
−
1
axis
g
Sens
−
Z
2
−
Sens
@
g
Output
T
Y
−
−
axis
Sens
⋅
100
@
Y
RT
−
%
Y
axis
−
Pin #1
Y-axis@-1g
axis
,
@
−
@
1
g
RT
Y-axis in +1 g
position
,
Z
⋅
is sensor’s Y-axis output reading [counts] in -1 g
100
%
,
X
Y-axis@+1g
Earth’s
gravitation
sensor’s Y-axis output
Y-axis
Y-axis@RT
sensor’s Y-axis
SCA3000 Series
is sensor’s
Rev.A.07
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Y-