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LM185BYH-2.5 Scheda tecnica(PDF) 8 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Il numero della parte LM185BYH-2.5
Spiegazioni elettronici  Micropower Voltage Reference Diode
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Produttore elettronici  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM185BYH-2.5 Scheda tecnica(HTML) 8 Page - National Semiconductor (TI)

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LM385-2.5 Applications (Continued)
METER THERMOMETERS
0˚C–100˚C Thermomemter
00551926
Calibration
1.
Short LM385-2.5, adjust R3 for I
OUT=temp at 1µA/˚K
2.
Remove short, adjust R2 for correct reading in
centigrade
0˚F–50˚F Thermomemter
00551927
Calibration
1.
Short LM385-2.5, adjust R3 for I
OUT=temp at 1.8 µA/˚K
2.
Remove short, adjust R2 for correct reading in ˚F
Micropower Thermocouple Cold Junction
Compensator
00551906
Adjustment Procedure
1.
Adjust TC ADJ pot until voltage across R1 equals Kelvin
temperature multiplied by the thermocouple Seebeck
coefficient.
2.
Adjust zero ADJ pot until voltage across R2 equals the
thermocouple Seebeck coefficient multiplied by 273.2.
Seebeck
Voltage
Voltage
Thermocouple
Co-
R1
R2
Across R1
Across R2
Type
efficient
(
Ω)(Ω)
@25˚C
(mV)
(
µV/˚C)
(mV)
J
52.3
523 1.24k
15.60
14.32
T
42.8
432
1k
12.77
11.78
K
40.8
412 953
Ω
12.17
11.17
S
6.4
63.4 150
Ω
1.908
1.766
Typical supply current 50 µA
www.national.com
8


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