SCA61T 반도체 회로 부품 판매점
INCLINOMETER SERIES
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Data Sheet
SCA61T Series
THE SCA61T INCLINOMETER SERIES
The SCA61T Series is a 3D-MEMS-based single axis inclinometer family that provides instrumentation grade
performance for leveling applications. Low temperature dependency, high resolution and low noise together with
robust sensing element design make the SCA61T ideal choice for leveling instruments. The VTI inclinometers are
insensitive to vibration, due to their over damped sensing elements and can withstand mechanical shocks of
20000 g.
Features
• Measuring ranges ±30° SCA61T-FAHH1G
and ± 90° SCA61T-FA1H1G
• 0.0025° 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
• Single +5 V supply
• Ratiometric analog voltage outputs
• Digital SPI inclination and temperature output
• Comprehensive failure detection features
o True self test by deflecting the sensing
elements’ proof mass by electrostatic force.
o Continuous sensing element interconnection
failure check.
o Continuous memory parity check.
• RoHS compliant
• Compatible with Pb-free reflow solder process
Applications
• Platform leveling and stabilization
• Leveling instruments
• Acceleration and motion measurement
6 ST
Sensing
element
Self test 1
8 VDD
Signal conditioning
and filtering
EEPROM
calibration
memory
Temperature
Sensor
A/D conversion
SPI interface
Figure 1.
4 GND
Functional block diagram
7 OUT
1 SCK
2 MISO
3 MOSI
5 CSB
VTI Technologies Oy
www.vti.fi
Subject to changes
Doc. nr. 8261900
1/18
Rev.A
SCA61T Series
TABLE OF CONTENTS
The SCA61T Inclinometer Series.............................................................................................1
Features ................................................................................................................................................ 1
Applications .........................................................................................................................................1
Table of Contents .....................................................................................................................2
1 Electrical Specifications .....................................................................................................3
1.1 Absolute Maximum Ratings......................................................................................................3
1.2 Performance Characteristics ....................................................................................................3
1.3 Electrical Characteristics ..........................................................................................................4
1.4 SPI Interface DC Characteristics ..............................................................................................4
1.5 SPI Interface AC Characteristics ..............................................................................................4
1.6 SPI Interface Timing Specifications .........................................................................................5
1.7 Electrical Connection ................................................................................................................6
1.8 Typical Performance Characteristics.......................................................................................6
1.9 Additional External Compensation ..........................................................................................7
2 Functional Description .......................................................................................................9
2.1 Measuring Directions ................................................................................................................9
2.2 Voltage to Angle Conversion....................................................................................................9
2.3 Ratiometric Output ....................................................................................................................9
2.4 SPI Serial Interface ..................................................................................................................10
2.5 Digital Output to Angle Conversion .......................................................................................12
2.6 Self Test and Failure Detection Modes ..................................................................................13
2.7 Temperature Measurement .....................................................................................................14
3 Application Information ....................................................................................................15
3.1 Recommended Circuit Diagrams and Printed Circuit Board Layouts ................................15
3.2 Recommended Printed Circuit Board Footprint ...................................................................16
4 Mechanical Specifications and Reflow Soldering ..........................................................16
4.1 Mechanical Specifications (Reference only) .........................................................................16
4.2 Reflow Soldering......................................................................................................................17
5 Document Change Control...............................................................................................18
6 Contact Information ..........................................................................................................18
VTI Technologies Oy
www.vti.fi
Subject to changes
Doc. nr. 8261900
2/18
Rev.A
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