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SCA121T-D03

P1-P3P4-P5
SCA121T Series
Murata Electronics Oy Subject to changes 4/5
www.muratamems.fi Doc. nr. 82 1274 00 Rev.A
1.3 Electrical Characteristics
Parameter
Condition
Min.
Typ
Max.
Units
Current consumption
Vdd = 5 V; No load
5
8
mA
Operating temperature
-25
+85
°C
Analog resistive output load
Vout to Vdd or GND
10
kOhm
Analog capacitive output load
Vout to Vdd or GND
20
nF
Start-up delay
Reset and parity check
10
ms
1.4 Electrical Connection
Wire Color
Name
Function
Blue
GND
Ground
Red
Vdd
Power supply
Yellow
Out X
X-axis output
Green
Out Y
Y-axis output
White
NC
Not Connected
2 Functional Description
2.1 Measuring Directions
Figure 1. The measuring directions of the SCA121T
2.2 Voltage to Angle Conversion
Analog output can be transferred to angle using the following equation for conversion:
−
=
ySensitivit
OffsetV
out
arcsin
α
Where: Offset = output of the device at 0° inclination position, Sensitivity is the sensitivity of the
device and V
Dout
is the output of the SCA121T. The nominal offset is 2.5 V and the sensitivity is 4
V/g for the SCA121T-D07 and 2 V/g for the SCA121T-D03 and SCA121T-D05.
Angles close to 0° inclination can be estimated quite accurately with straight line conversion but for
the best possible accuracy, arcsine conversion is recommended to be used. The following table
shows the angle measurement error if straight line conversion is used.
SCA121T Series
Murata Electronics Oy Subject to changes 5/5
www.muratamems.fi Doc. nr. 82 1274 00 Rev.A
ySensitivit
OffsetV
out
−
=
α
Straight line conversion equation:
Where: Sensitivity = 70mV/° with SCA121T-D07 or Sensitivity= 35mV/° with SCA121T-D03 and
SCA121T-D05
Tilt angle [°]
Straight line conversion error [°]
0
0
1
0.0027
2
0.0058
3
0.0094
4
0.0140
5
0.0198
10
0.0787
15
0.2185
30
1.668
2.3 Ratiometric Output
Ratiometric output means that the zero offset point and sensitivity of the sensor are proportional to
the supply voltage. If the SCA121T-D05 supply voltage is fluctuating the SCA121T-D05 output will
also vary. When the same reference voltage for both the SCA121T-D05 sensor module and the
measuring part (A/D-converter) is used, the error caused by reference voltage variation is
automatically compensated for.
3 Mechanical Specifications
Cable length: -D03,-D07 30cm
-D05 110cm
Cable type: UL/CSA listed, PUR black
Cable diam.: 6±0.2mm
Leads: 5 x 0.14mm
2
Total weight: Approx. 60 grams
Protection class: IP66
Housing: Zinc casting with passivation
Mounting: The sensor module is to be mounted on a flat and smooth surface
with 2 screws, dimension M4. Mounting torque 5 ±1Nm
3.1 Sensor dimensions
Figure 2. Mechanical dimensions of the SCA121T (Dimensions in mm)
P1-P3P4-P5

SCA121T-D03

Mfr. #:
Buy SCA121T-D03
Manufacturer:
Murata Electronics
Description:
Inclinometers 2-Axis Inclinometer Module
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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