SCA3100-D04 VTI Technologies, SCA3100-D04 Datasheet - Page 36

• 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
8.1 Offset
8.1.1
8.1.2
VTI Technologies Oy
www.vti.fi
Data sheet references
Offset calibration error
Offset temperature error
SCA3000's offset will be calibrated in X = 0 g, Y = 0 g, and Z = +1 g (Z measuring axis is parallel to
earth’s gravitation) position, see Figure 20.
Offset calibration error is the difference between the sensor's actual output reading and the nominal
output reading in calibration conditions. Error is calculated by
Equation 2
where Output
output reading [counts], Output is sensor’s nominal output in 0 g position and Sens sensor’s nominal
sensitivity [counts/g].
Offset temperature error is the difference between the sensor's output reading in different
temperatures and the sensor’s calibrated offset value at room temperature. Error is calculated by
Equation 3
where Output
is sensor’s X-axis output reading [counts] in temperature T, Output
[counts] at room temperature RT and Sens sensor’s nominal sensitivity [counts/g]. Sensor is in 0 g
position for every measurement point.
Offset
Offset
Pin #1
Figure 20. SCA3000 offset (0 g) position.
X
X
−
−
axisCalibE
axisTempEr
X-axisTempEr@T
X-axisCalibEr
X
r
@
=
T
Output
=
Z-axis in +1 g
position
is sensor’s X-axis calibration error in [mg], Output
Output
Doc.Nr. 8257300A.07
is sensor’s X-axis temperature error in [mg] in temperature T, Output
X
−
Sens
axis
Y
X
−
−
axis
Output
@
T
Sens
−
Output
⋅
1000
Earth’s
gravitation
X
,
−
axis
@
RT
⋅
1000
,
X-axis@T
X-axis
X-axis output reading
is sensor’s X-axis
SCA3000 Series
Rev.A.07
X-axis@T
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