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CXTA02 Datasheet(PDF) 2 Page - Willow Technologies Ltd

No. de pieza CXTA02
Descripción Electrónicos  Small, Low-Cost, Rugged
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Fabricante Electrónico  WILLOW [Willow Technologies Ltd]
Página de inicio  http://www.willow.co.uk
Logo WILLOW - Willow Technologies Ltd

CXTA02 Datasheet(HTML) 2 Page - Willow Technologies Ltd

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MEMSIC Inc.
San Jose, California
www .memsic.co m
6020-0013-03 Rev A
Ordering Information
Principle of Operation
TheCXTASeriesTiltSensorsusea
micro-machinedaccelerationsensing
elementwithaDCresponseto
measureinclinationrelativetograv-
ity.Theresponseofthetiltsensor
dependsonthemagnitudeofgravity
paralleltothesensorelement.The
outputofthetiltsensorwillbean
offsetvoltageplusthevoltagere-
sponseproportionaltotheamount
ofgravitymeasuredbythesensor.
Using the CXTA Sensor
ThevoltageresponseoftheCXTA
isproportionaltothesineofthetilt
angle.
Accuratelymeasuringtiltangle
involvessolvingtheequationshown
inFigure1.Tosolvethisequationthe
ZeroAngleVoltageandSensitivity
mustbedeterminedpriortouse,and
thesensitivitymustbeconvertedto
V/rad.MEMSICprovidesthisinfor-
mationonacalibrationsheetwithits
CXTAproducts.
Forangleslessthan20°,thesine
functioncanbeapproximatedbya
linearrelationshipbetweentheVout
andthetiltangleindegrees.Thus
thesimplifiedequationforsmall
angleindegreesis:
Whenthetiltangleislessthan20°,
theerrorfromlinearapproximation
willbelessthan2%.Thisisconve-
nientwhenyoudon’thaveorwant
thecomputingpowertocalculatean
inversesinefunction.
Figure1
Sensitivity(V/rad)
Pin
Color
Function
1
Red
Power
2
Black
Ground
3
White
Roll
4
Yellow
Pitch
5
Green
Temp
Pin Diagram
ø = Vout - Zero Angle Voltage
Sensitivity
ø = sin
Vout (V) - Zero Angle Voltage (V)
-1
Sensitivity
(V/rad)
ø
Model
Axes
Linear Range
Full Range
Resolution
CXTA01
X
±20º
±75º
0.05º
CXTA02
X,Y
± 20º
±75º
0.05º
OPTIONS
-T
TemperatureSensorInternal
-AL
HighTemperatureAluminumPackage
call factory for other configurations
Specifications
CXTA01
CXTA02
Remarks
Performance
LinearAngularRange(°)
±20
±20
FullAngularRange(°)
±75
±75
AngularResolution(°rms)
0.05
0.05
Sensitivity-smallangles(mV/O)
35±2
35±2
ActualvalueprovidedwithSensor
SensitivityDrift(%/OC)
0.01
0.01
ZeroAngleVoltage(Volts)
2.5±0.15
2.5±0.15
ActualvalueprovidedwithSensor
ZeroAngleDrift(mV/OC)
1.0
1.0
Typical
ZeroAngleDrift(O/OC)
0.03
0.03
Typical
Non-Linearity(°)
<0.4
<0.4
Over±20OnotincludingArcsineError
Bandwidth(Hz)
50
50
SettlingTime(sec)
0.2
0.2
Alignment(°)
±1
±1
Typical
Cross-axisSensitivity(%))
<5
<5
Inclusiveofalignmenterror
Environment
StorageTemperature(OC)
-55to+85
-55to+85
NylonPackage
OperatingTemperature(OC)
-40to+85
-40to+85
NylonPackage
StorageTemperature(OC)
-55to+105
-55to+105
-ALHighTemperaturePackage
OperatingTemperature(OC)
-40to+105
-40to+105
-ALHighTemperaturePackage
Non-OperatingVibration(grms) 10
10
20-2kHzrandom
Shock(g)
2000
2000
1ms,halfsine
Electrical
SupplyVoltage(VDC)
6-30
6-30
Unregulated
Current(mA)
4
8
Physical
Size(NylonPackage)
.78x1.75x1.07”(1.98x4.45x2.72cm)
(AluminumPackage)
.95x2.00x1.20“(2.41x5.08x3.05cm)
Weight(NylonPackage)
1.38oz(43gm)
(AluminumPackage)
2.09oz(65gm)
Specificationssubjecttochangewithoutnotice
OptionalAluminumPackage


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