MAX6627中文资料

GeneralDescriptionTheMAX6627/MAX6628precisedigitaltemperaturesensorsreportthetemperatureofaremotesensor.Theremotesensorisadiode-connectedtransistor,typicallyalow-cost,easilymounted2N3904NPNtypethatreplacesconventionalthermistorsorthermocouples.TheMAX6627/MAX6628canalsomeasurethedietem-peratureofotherICs,suchasmicroprocessors(µPs)ormicrocontrollers(µCs)thatcontainanon-chip,diode-connectedtransistor.Remoteaccuracyis±1°Cwhenthetemperatureoftheremotediodeisbetween0°Cand+125°Candthetem-peratureoftheMAX6627/MAX6628is+30°C.Thetem-peratureisconvertedtoa12-bit+signwordwith0.0625°Cresolution.Thearchitectureofthedeviceiscapableofinterpretingdataashighas+145°Cfromtheremotesensor.TheMAX6627/MAX6628tempera-tureshouldneverexceed+125°C.Thesesensorsare3-wireserialinterfaceSPI™compat-ible,allowingtheMAX6627/MAX6628tobereadilycon-nectedtoavarietyofµCs.TheMAX6627/MAX6628areread-onlydevices,simplifyingtheiruseinsystemswhereonlytemperaturedataisrequired.Twoconversionratesareavailable,onethatcontinu-ouslyconvertsdataevery0.5s(MAX6627),andonethatconvertsdataevery8s(MAX6628).Theslowerver-sionprovidesminimalpowerconsumptionunderalloperatingconditions(30µA,typ).Eitherdevicecanbereadatanytimeandprovidethedatafromthelastcon-version.Bothdevicesoperatewithsupplyvoltagesbetween+3.0Vand+5.5V,arespecifiedbetween-55°Cand+125°C,andcomeinthespace-saving8-pinSOT23package.ApplicationsHardDiskDriveSmartBatteryPacksAutomotiveIndustrialControlSystemsNotebooks,PCsFeaturesAccuracy±1°C(max)from0°C≤TRJ≤+125°C,TA=+30°C±2.4°C(max)from-55°C≤TRJ≤+100°C,0°C≤TA≤+70°C12-Bit+Sign,0.0625°CResolutionLowPowerConsumption30µA(typ)(MAX6628)200µA(typ)(MAX6627)OperatingTemperatureRange(-55°Cto+125°C)MeasurementTemperatureRange,RemoteJunction(-55°Cto+145°C)0.5s(MAX6627)or8s(MAX6628)ConversionRateSPI-CompatibleInterface+3.0Vto+5.5VSupplyRange8-PinSOT23PackageMAX6627/MAX6628Remote±1°CAccurateDigitalTemperatureSensorswithSPI-CompatibleSerialInterface________________________________________________________________MaximIntegratedProducts119-2032;Rev1;7/01Forpricing,delivery,andorderinginformation,pleasecontactMaxim/DallasDirect!at1-888-629-4642,orvisitMaxim’swebsiteat°Cto+125°C8SOT23-8AAEQMAX6628MKA-T-55°Cto+125°C8SOT23-8AAERSPIisatrademarkofMotorola,Inc.PinConfigurationappearsatendofdatasheet.SDOGNDSCKµC+3VTO+5.5VMAX6627MAX6628CSDXPDXN2200pF2200pF0.1µFVCCTypicalOperatingCircuitMAX6627/MAX6628Remote±1°CAccurateDigitalTemperatureSensorswithSPI-CompatibleSerialInterface2_______________________________________________________________________________________ABSOLUTEMAXIMUMRATINGSStressesbeyondthoselistedunder“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedintheoperationalsectionsofthespecificationsisnotimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayaffectdevicereliability.AllVoltagesReferencedtoGNDVCC...........................................................................-0.3Vto+6VSO,SCK,DXP,CS........................................-0.3VtoVCC+0.3VDXN.......................................................................-0.3Vto+0.8VSOPinCurrentRange.........................................-1mAto+50mACurrentIntoAllOtherPins..................................................10mAESDProtection(HumanBodyModel)................................2000VContinuousPowerDissipation(TA=+70°C)8-PinSOT23(derate9.7mW/°Cabove+70°C)...........777mWOperatingTemperatureRange.........................-55°Cto+125°CJunctionTemperature......................................................+150°CStorageTemperatureRange.............................-65°Cto+150°CLeadTemperature(soldering,10s)...................................Note1ELECTRICALCHARACTERISTICS(3.0V≤VCC≤5.5V,-55°C≤TA≤+125°C,unlessotherwisenoted.TypicalvaluesareatTA=+25°C,VCC=+3.3V,unlessotherwisenoted.)PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSTEMPERATURE0°C≤TRJ≤+125°C,TA=+30°C,VCC=+3.3V-1.0±0.5±1-55°C≤TRJ≤+100°C,0°C≤TA≤+70°C,VCC=+3.3V-2.4+2.4-55°C≤TRJ≤+145°C,0°C≤TA≤+70°C,VCC=+3.3V-4.5+4.5Accuracy-55°C≤TRJ≤+125°C,-55°C≤TA≤+125°C,VCC=+3.3V-5.5+5.5°CPower-SupplySensitivity0.250.7°C/VResolution0.0625°CMAX66270.5TimeBetweenConversionStartstSAMPLEMAX66288sConversionTimetCONV180250320msPOWERSUPPLYSupplyVoltageRangeVCC3.05.5VISDShutdown,VCC=+0.8V5IIDLEADCidle,CS=low20SupplyCurrent,SCKIdleICONVADCconverting360600µAMAX6627200400AverageOperatingCurrentICCMAX66283050µAPower-OnReset(POR)ThresholdVCC,fallingedge1.6VHighlevel80100120CurrentSourcingforDiodeLowlevel81012µANote1:Thisdeviceisconstructedusingauniquesetofpackagingtechniquesthatimposealimitonthethermalprofilethedevicecanbeexposedtoduringboard-levelsolderattachandrework.Thislimitpermitsonlytheuseofthesolderprofilesrecommendedintheindustry-standardspecification,JEDEC020A,paragraph7.6,Table3forIR/VPRandConvectionReflow.Preheatingisrequired.Handorwavesolderingisnotallowed.MAX6627