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Details, datasheet, quote on part number:LM34H
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| Part: | LM34H |
| Category: | Sensors => Temperature Sensors |
| Description: | Precision Fahrenheit Temperature Sensors |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download LM34H datasheet File size : 254 kB |
| Request For quote: | Find where to buy LM34H
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Datasheet text preview:
LM34 Precision Fahrenheit Temperature Sensors
July 1999
LM34 Precision Fahrenheit Temperature Sensors
General Description
The LM34 series are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Fahrenheit temperature. The LM34 thus has an advantage over linear temperature sensors calibrated in degrees Kelvin, as the user is not required to subtract a large constant voltage from its output to obtain convenient Fahrenheit scaling. The LM34 does not require any external calibration or trimming to provide typical accuracies of ± 1/2°F at room temperature and ± 11/2°F over a full -50 to +300°F temperature range. Low cost is assured by trimming and calibration at the wafer level. The LM34's low output impedance, linear output, and precise inherent calibration make interfacing to readout or control circuitry especially easy. It can be used with single power supplies or with plus and minus supplies. As it draws only 75 µA from its supply, it has very low self-heating, less than 0.2°F in still air. The LM34 is rated to operate over a -50° to +300°F temperature range, while the LM34C is rated for a -40° to +230°F range (0°F with improved accuracy). The LM34 series is available packaged in hermetic TO-46 transistor packages, while the LM34C, LM34CA and LM34D are also available in the plastic TO-92 transistor package. The LM34D is also available in an 8-lead surface mount small outline package. The LM34 is a complement to the LM35 (Centigrade) temperature sensor.
Features
n n n n n n n n n n n Calibrated directly in degrees Fahrenheit Linear +10.0 mV/°F scale factor 1.0°F accuracy guaranteed (at +77°F) Rated for full -50° to +300°F range Suitable for remote applications Low cost due to wafer-level trimming Operates from 5 to 30 volts Less than 90 µA current drain Low self-heating, 0.18°F in still air Nonlinearity only ± 0.5°F typical Low-impedance output, 0.4 for 1 mA load
Connection Diagrams
TO-46 Metal Can Package (Note 1) TO-92 Plastic Package SO-8 Small Outline Molded Package
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Order Numbers LM34H, LM34AH, LM34CH, LM34CAH or LM34DH See NS Package Number H03H
Order Number LM34CZ, LM34CAZ or LM34DZ See NS Package Number Z03A
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N.C. = No Connection
Top View Order Number LM34DM See NS Package Number M08A
Note 1: Case is connected to negative pin (GND).
TRI-STATE ® is a registered trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation
DS006685
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Typical Applications
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FIGURE 1. Basic Fahrenheit Temperature Sensor (+5° to +300°F)
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FIGURE 2. Full-Range Fahrenheit Temperature Sensor
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Absolute Maximum Ratings (Note 11)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Output Voltage Output Current Storage Temperature, TO-46 Package TO-92 Package SO-8 Package ESD Susceptibility (Note 12) Lead Temp. +35V to -0.2V +6V to -1.0V 10 mA -76°F to +356°F -76°F to +300°F -65°C to +150°C 800V
TO-46 Package (Soldering, 10 seconds) TO-92 Package (Soldering, 10 seconds) SO Package (Note 13) Vapor Phase (60 seconds) Infrared (15 seconds) Specified Operating Temp. Range (Note 3) LM34, LM34A LM34C, LM34CA LM34D
+300°C +260°C 215°C 220°C TMIN to TMAX -50°F to +300°F -40°F to +230°F +32°F to +212°F
DC Electrical Characteristics (Notes 2, 7)
LM34A Parameter Conditions Typical Accuracy (Note 8) TA = +77°F TA = 0°F TA = TMAX TA = TMIN Nonlinearity (Note 9) Sensor Gain (Average Slope) Load Regulation (Note 4) Line Regulation (Note 4) Quiescent Current (Note 10) TA = +77°F TMIN TA TMAX 0 IL 1 mA TA = +77°F 5V VS 30V VS = +5V, +77°F VS = +5V VS = +30V, +77°F VS = +30V 4V VS 30V, +77°F 5V VS 30V TMIN TA TMAX TMIN TA TMAX Tested Limit (Note 5) Design Limit (Note 6) Typical LM34CA Tested Limit (Note 5) Design Limit (Note 6) °F Units (Max)
± 0.4 ± 0.6 ± 0.8 ± 0.8 ± 0.35
+10.0
± 1.0 ± 2.0 ± 2.0 ± 0.7
+9.9, +10.1
± 0.4 ± 0.6 ± 0.8 ± 0.8 ± 0.30
+10.0
± 1.0 ± 2.0 ± 2.0 ± 3.0 ± 0.6
+9.9, +10.1
°F °F °F °F mV/°F, min mV/°F, max mV/mA mV/mA mV/V
± 0.4 ± 0.5 ± 0.01 ± 0.02
75 131 76 132 +0.5 +1.0 +0.30
± 1.0 ± 3.0 ± 0.05 ± 0.1
90 160 92 163 2.0 3.0 +0.5 +5.0
± 0.4 ± 0.5 ± 0.01 ± 0.02
75 116 76 117 0.5 1.0 +0.30 +3.0
± 1.0 ± 3.0 ± 0.05 ± 0.1
90 139 92 142 2.0 3.0 +0.5 +5.0
mV/V µA µA µA µA µA µA µA/°F °F °F
Change of Quiescent Current (Note 4) Temperature Coefficient of Quiescent Current Minimum Temperature for Rated Accuracy Long-Term Stability
In circuit of Figure 1, IL = 0 Tj = TMAX for 1000 hours
+3.0
± 0.16
± 0.16
Note 2: Unless otherwise noted, these specifications apply: -50°F Tj + 300°F for the LM34 and LM34A; -40°F Tj +230°F for the LM34C and LM34CA; and +32°F Tj + 212°F for the LM34D. VS = +5 Vdc and ILOAD = 50 µA in the circuit of Figure 2; +6 Vdc for LM34 and LM34A for 230°F Tj 300°F. These specifications also apply from +5°F to TMAX in the circuit of Figure 1. Note 3: Thermal resistance of the TO-46 package is 720°F/W junction to ambient and 43°F/W junction to case. Thermal resistance of the TO-92 package is 324°F/W junction to ambient. Thermal resistance of the small outline molded package is 400°F/W junction to ambient. For additional thermal resistance information see table in the Typical Applications section. Note 4: Regulation is measured at constant junction temperature using pulse testing with a low duty cycle. Changes in output due to heating effects can be computed by multiplying the internal dissipation by the thermal resistance. Note 5: Tested limits are guaranteed and 100% tested in production. Note 6: Design limits are guaranteed (but not 100% production tested) over the indicated temperature and supply voltage ranges. These limits are not used to calculate outgoing quality levels. Note 7: Specification in BOLDFACE TYPE apply over the full rated temperature range.
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