LM235AH National Semiconductor, LM235AH Datasheet - Page 9

• Manufacturer Part Number: LM235AH
• Manufacturer: National Semiconductor

Specifications of LM235AH

• Temperature Sensor Function: Temp Sensor
• Output Type: Analog
• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• Operating Temperature Classification: Automotive
• Operating Supply Voltage (min): 5V
• Lead Free Status / RoHS Status: Not Compliant

*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.
THERMO-
COUPLE
T
K
S
T
J
J
14.32 mV
11.79 mV
(±1%)
45.8Ω
377Ω
308Ω
293Ω
R3
THERMOCOUPLE COLD JUNCTION COMPENSATION
Compensation for Grounded Thermocouple
COEFFICIENT
SEEBECK
52.3 μV/°C
42.8 μV/°C
40.8 μV/°C
6.4 μV/°C
Fahrenheit Thermometer
K
S
9
11.17 mV
1.768 mV
569824
569806
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