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LM335 Datasheet(PDF) 8 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM335
Description  Precision Temperature Sensors
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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 8 page
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Typical Applications (Continued)
Fahrenheit Thermometer
DS005698-24
*To calibrate adjust R2 for 2.554V across LM336.
Adjust R1 for correct output.
THERMOCOUPLE COLD JUNCTION COMPENSATION
Compensation for Grounded Thermocouple
DS005698-6
*Select R3 for proper thermocouple type
THERMO-
R3
SEEBECK
COUPLE
(±1%)
COEFFICIENT
J
377
52.3 µV/˚C
T
308
42.8 µV/˚C
K
293
40.8 µV/˚C
S
45.8
6.4 µV/˚C
Adjustments: Compensates for both sensor and resistor tolerances
1. Short LM329B
2. Adjust R1 for Seebeck Coefficient times ambient temperature (in degrees K) across R3.
3. Short LM335 and adjust R2 for voltage across R3 corresponding to thermocouple type
J
14.32 mV
K
11.17 mV
T
11.79 mV
S
1.768 mV
www.national.com
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