SCA103T Series
Data Sheet
THE SCA103T DIFFERENTIAL INCLINOMETER SERIES
The SCA103T Series is a 3D-MEMS-based single axis inclinometer family that uses the differential measurement
principle. The high calibration accuracy combines extremely low temperature dependency, high resolution and low
noise together with a robust sensing element design, to make the SCA103T an ideal choice for high accuracy
leveling instruments. The VTI inclinometers are insensitive to vibration due to having over damped sensing
elements plus they can withstand mechanical shocks of 20000 g.
Features
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Measuring ranges ±15° SCA103T-D04 and
± 30° SCA103T-D05
0.001° resolution (10 Hz BW, analog output)
Sensing element controlled over damped
frequency response (-3dB 18Hz)
Robust design, high shock durability (20000g)
Excellent stability over temperature and time
Common mode error and noise reduction
using the differential measurement principle
Single +5 V supply
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Ratiometric analog voltage outputs
Digital SPI inclination and temperature output
Comprehensive failure detection features
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True self test by deflecting the sensing
elements’ proof mass by electrostatic force.
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Continuous sensing element interconnection
failure check.
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Continuous memory parity check.
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RoHS compliant
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Compatible with Pb-free reflow solder process
Applications
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Platform leveling and stabilization
Rotating laser levels
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Leveling instruments
Construction levels
12 VDD
Sensing
element 1
Signal conditioning
and filtering
A/D conversion
11 OUT_1
10 ST_1
Self test 1
9 ST_2
Self test 2
EEPROM
calibration
memory
Temperature
Sensor
SPI interface
1 SCK
3 MISO
4 MOSI
7 CSB
Sensing
element 2
Signal conditioning
and filtering
5 OUT_2
6 GND
Figure 1.
Functional block diagram
VTI Technologies Oy
www.vti.fi
Subject to changes
Doc.Nr. 8261700
1/19
Rev.A