lm135-md8 National Semiconductor Corporation, lm135-md8 Datasheet - Page 8

• Manufacturer Part Number: lm135-md8
• Description: Precision Temperature Sensor
• Manufacturer: National Semiconductor Corporation

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Typical Applications
*To calibrate adjust R2 for 2.554V across LM336.
Adjust R1 for correct output.
*
Select R3 for proper thermocouple type
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
THERMOCOUPLE COLD JUNCTION COMPENSATION
(Continued)
THERMO-
T
J
COUPLE
Compensation for Grounded Thermocouple
K
S
J
T
14.32 mV
11.79 mV
Fahrenheit Thermometer
(
45.8
377
308
293
±
R3
1%)
8
K
S
COEFFICIENT
SEEBECK
52.3 µV/˚C
42.8 µV/˚C
40.8 µV/˚C
6.4 µV/˚C
DS005698-24
1.768 mV
11.17 mV
DS005698-6