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LM135AD 데이터시트(PDF) 9 Page - STMicroelectronics

부품명 LM135AD
상세설명  PRECISION TEMPERATURE SENSORS
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제조업체  STMICROELECTRONICS [STMicroelectronics]
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LM135AD 데이터시트(HTML) 9 Page - STMicroelectronics

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THERMOCOUPLE COLD JUNCTION COMPENSATION
(compensation for grounded thermocouple)
LM135
LM235
LM335
R1
10k
4.7k
+15V
1N4568
R2
10
k
R3*
200k
1M
1%
Thermocouple
-15V
12k
71.5k
1%
1%
* Select R3 for proper thermocouple type
Adjustments : compensates for both sensor
and resistor tolerances.
1. Short 1N4568.
2. Adjust R1 for SEEBEC K coefficient times
ambient temperature (in degrees K) across
R3.
3. Short LM135 and adjust R2 for voltage
across R3 corresponding to thermocouple
type.
J
14.32mV
K
11.17mV
T
11.79mV
S
1.768mV
Thermo-
couple
R3
Seebeck
Coefficient
J
T
K
S
377
308
293
45.8
52.3
µV/oC
42.8
µV/oC
40.8
µV/oC
6.4
µV/oC
SINGLE POWER SUPPLY COLD JUNCTION COMPENSATION
LM135
LM235
LM335
R1
10k
10k
+15V
+15V
1N4568
200k
1M
R2
10
k
R4*
Output
Thermocouple
R3*
200k
* Select R3 and R4 for proper thermocouple
Adjustments :
1. Adjust R1 for the voltage across R3 equal
to the SEEBECK coeffi cient times ambient
temperature in degrees Kelvin.
2. Adjust R2 for voltage across R4 correspon-
ding to thermocouple.
J
14.32mV
K
11.17mV
T
11.79mV
S
1.768mV
Thermo-
couple
R3
R4
Seebeck
Coefficient
J
T
K
S
1.05k
856
816
128
365
315
300
46.3
52.3
µV/oC
42.8
µV/oC
40.8
µV/oC
6.4
µV/oC
LM135-LM235-LM335,A
9/11


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