Rainbow-electronics LM75 Bedienungsanleitung

LM75Digital Temperature Sensor and Thermal Watchdog withTwo-Wire InterfaceGeneral DescriptionThe LM75 is a temperature sensor, Delta-Sigmaanalog-to-di

1.0 Functional Description (Continued)1.10 INTERNAL REGISTER STRUCTURE01265808There are four data registers in the LM75, selected by thePointer regist

1.0 Functional Description (Continued)1.11 POINTER REGISTER(Selects which registers will be read from or written to):P7 P6 P5 P4 P3 P2 P1 P0000000Regi

2.0 I2C Timing Diagrams01265810FIGURE 6. Timing DiagramLM75www.national.com 12

2.0 I2C Timing Diagrams (Continued)01265811FIGURE 7. Timing Diagrams (Continued)LM75www.national.com13

3.0 Application HintsTo get the expected results when measuring temperaturewith an integrated circuit temperature sensor like the LM75,it is important

4.0 Typical Applications (Continued)01265813FIGURE 9. Data Acquisition System with Temperature Input via I2C Bus01265814FIGURE 10. Simple Thermostat,

4.0 Typical Applications (Continued)01265815FIGURE 11. Temperature Sensor with Loudmouth Alarm (Barking Watchdog)LM75www.national.com 16

Physical Dimensions inches (millimeters) unless otherwise noted8-Lead (0.150" Wide) Molded Small Outline Package (SOP), JEDECOrder Number LM75CIM

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)8-Lead Molded Mini Small Outline Package (MSOP)(JEDEC REGISTRATION NUMBER M

Connection DiagramSOP-8 and Mini SOP-801265802Ordering InformationOrder NumberPackageMarkingNS PackageNumberSupplyVoltageTransport MediaNoise Filteron

Pin Description (Continued)01265803FIGURE 1. Typical ApplicationLM75www.national.com3

Absolute Maximum Ratings (Note 1)Supply Voltage −0.3V to 6.5VVoltage at any Pin −0.3V to +VS+ 0.3VInput Current at any Pin (Note 2) 5 mAPackage Input

Logic Electrical Characteristics (Continued)DIGITAL DC CHARACTERISTICS Unless otherwise noted, these specifications apply for +VS= +5 Vdc for LM75BIM-

Note 5: LM75 θJA(thermal resistance, junction-to-ambient) when attached to a printed circuit board with 2 oz. foil similar to the one shown in Figure

Typical Performance CharacteristicsStatic Quiescent Current vsTemperatureDynamic Quiescent Current vsTemperature Accuracy vs Temperature01265816012658

1.0 Functional Description (Continued)by crossing TOS, then reset, it can be activated again only byTemperature going below THYST. Again, it will rema

1.0 Functional Description (Continued)1.4 TEMPERATURE DATA FORMATTemperature data can be read from the Temperature, TOSSet Point, and THYSTSet Point r