Rainbow-electronics LM34 Manual de usuario Pagina 1

LM34Precision Fahrenheit Temperature SensorsGeneral DescriptionThe LM34 series are precision integrated-circuit temperaturesensors, whose output volta

Typical Applications (Continued)Block DiagramTemperature ControllerDS006685-18DS006685-19LM34www.national.com 10

Physical Dimensions inches (millimeters) unless otherwise notedOrder Number LM34H, LM34AH, LM34CH,LM34CAH or LM34DHNS Package H03HOrder Number LM34DMN

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)LIFE SUPPORT POLICYNATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITIC

Typical ApplicationsDS006685-3FIGURE 1. Basic Fahrenheit Temperature Sensor(+5˚ to +300˚F)DS006685-4FIGURE 2. Full-Range Fahrenheit Temperature Sensor

Absolute Maximum Ratings (Note 11)If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distribu

DC Electrical Characteristics (Notes 2, 7) (Continued)Note 8: Accuracy is defined as the error between the output voltage and 10 mV/˚F times the devic

Typical Performance CharacteristicsThermal ResistanceJunction to AirDS006685-22Thermal Time ConstantDS006685-23Thermal Response inStill AirDS006685-24

Typical Performance Characteristics (Continued)Typical ApplicationsThe LM34 can be applied easily in the same way as otherintegrated-circuit temperatu

Typical ApplicationsTemperature Rise of LM34 Due to Self-Heating (Thermal Resistance)Conditions TO-46, TO-46, TO-92, TO-92, SO-8 SO-8No HeatSinkSmall

Typical Applications (Continued)4-to-20 mA Current Source(0 to +100˚F)DS006685-11Fahrenheit Thermometer(Analog Meter)DS006685-12Expanded Scale Thermom

Typical Applications (Continued)Bar-Graph Temperature Display(Dot Mode)DS006685-16*= 1% or 2% film resistor— Trim RBfor VB= 3.525V— Trim RCfor VC= 2.7