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CXTA02 Datasheet(PDF) 2 Page - Willow Technologies Ltd |
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CXTA02 Datasheet(HTML) 2 Page - Willow Technologies Ltd |
2 / 2 page 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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