NSA2300-Datasheet-Rev0.1

NOVOSENSENSA831:PressureSensorConditionerwithDigitalTemperatureCalibrationDatasheetProductOverviewzTheNSA831isahighlyintegrated,lowpowerhighprecisionpressuresensorconditioner.TheNSA831featuresalownoiseinstrumentamplifier,alowpower24bitΣ-ΔADC,a12bitsDACanddigitalsensorCalibrationlogics.zBothinternalandexternaltemperaturesensingaresupportedforthepressuresensorcalibrationwithaprecisionof±1℃zTheNSA831canprovideon-chipdigitalcompensationofsensoroffset,gain,temperaturedriftandnon-linearitybasedontheinternalfusebanks(OTP),whichisfast,precisewithoutthecostoverheadwithtrimmingbylaserorexternalcomponents.zDigitalcalibrationcoefficientscanbewrittentoOTPbyasimplyPC-basedcalibrationkitprovidedbyNovosensethroughtheSPI/I2Cinterface.KeyFeatureszInputReferredRMSnoise:600nV@OSR=1024X,GAIN=32XzDigitalcompensationofsensoroffset,sensitivity,temperaturedriftandnon-linearitywithon-chipOTP.zProgrammablegainforsensorswithdifferentinputspansuptorail-to-rail.zLowpowerinstrumentamplifierand24-bitΣ-ΔADCzHighaccuracy(±1)℃temperaturesensorz4-levelresolutionsettingsforpowerandaccuracytradeoffzSPI/I2CInterfacezUltralowpower-downcurrent(0.2uA)zSupplyvoltage2.0Vto5.5VzOperationtemperaturefrom-40°Cto125°CAvailableSupportszEvaluationkitwithcalibrationprocedureforfastuserdesignzSupportformasscalibrationzQuickcircuitcustomizationpossibleApplicationszPressuresensorconditionerzStrainGaugeinterfacezIndustryprocesscontrolNSA831NovosenseConfidentialPage21.0 ABSOLUTEMAXIMUMRATING.................................................................................................................................3 2.0 ELECTRICALCHARACTERISTICS............................................................................................................................3 3.0 REGISTERS.......................................................................................................................................................................6 3.1. CONTROLREGISTERS.....................................................................................................................................................6 4.0 FUNCTIONALDESCRIPTIONS....................................................................................................................................8 4.1. SIGNALPATH.....................................................................................................................................................................8 4.1.1. AnalogInputsandReference....................................................................................................................................8 4.1.2. PGA,BufferandModulator......................................................................................................................................8 4.1.3. DigitalFilterwithProgrammableOver-SamplingFactor.......................................................................................8 4.1.4. WorkMode................................................................................................................................................................9 4.1.4.1. PressureConversion.............................................................................................................................................9 4.1.4.2. Temperaturemeasurement....................................................................................................................................9 4.1.4.3. AnalogOutputMode.............................................................................................................................................9 4.2. OUTPUTDATAFORMAT....................................................................................................................................................10 4.3. OTP................................................................................................................................................................................10 4.4. SENSORCALIBRATION....................................................................................................................................................10 5.0 SPIINTERFACE.............................................................................................................................................................11 5.1. INTERFACESPECIFICATION..............................................................................................................................................11 6.0 I2CINTERFACE.............................................................................................................................................................13 7.0 PADASSIGNMENT........................................................................................................................................................14 8.0 TYPICALAPPLICATION.............................................................................................................................................15 8.1. I2CMO