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LM235AH 데이터시트 PDF




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부품번호 LM235AH 기능
기능 Precision Temperature Sensors
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LM235AH 데이터시트, 핀배열, 회로
May 1999
LM135/LM235/LM335, LM135A/LM235A/LM335A
Precision Temperature Sensors
General Description
The LM135 series are precision, easily-calibrated, integrated
circuit temperature sensors. Operating as a 2-terminal zener,
the LM135 has a breakdown voltage directly proportional to
absolute temperature at +10 mV/˚K. With less than 1dy-
namic impedance the device operates over a current range
of 400 µA to 5 mA with virtually no change in performance.
When calibrated at 25˚C the LM135 has typically less than
1˚C error over a 100˚C temperature range. Unlike other sen-
sors the LM135 has a linear output.
Applications for the LM135 include almost any type of tem-
perature sensing over a −55˚C to +150˚C temperature
range. The low impedance and linear output make interfac-
ing to readout or control circuitry especially easy.
The LM135 operates over a −55˚C to +150˚C temperature
range while the LM235 operates over a −40˚C to +125˚C
temperature range. The LM335 operates from −40˚C to
+100˚C. The LM135/LM235/LM335 are available packaged
in hermetic TO-46 transistor packages while the LM335 is
also available in plastic TO-92 packages.
Features
n Directly calibrated in ˚Kelvin
n 1˚C initial accuracy available
n Operates from 400 µA to 5 mA
n Less than 1dynamic impedance
n Easily calibrated
n Wide operating temperature range
n 200˚C overrange
n Low cost
Schematic Diagram
DS005698-1
© 1999 National Semiconductor Corporation DS005698
www.national.com




LM235AH pdf, 반도체, 판매, 대치품
Electrical Characteristics (Note 1) (Continued)
Note 1: Accuracy measurements are made in a well-stirred oil bath. For other conditions, self heating must be considered.
Note 2: Continuous operation at these temperatures for 10,000 hours for H package and 5,000 hours for Z package may decrease life expectancy of the device.
Note 3:
Thermal Resistance
TO-92
TO-46
θJA (junction to ambient)
202˚C/W 400˚C/W
θJC (junction to case)
170˚C/W
N/A
Note 4: Refer to RETS135H for military specifications.
SO-8
165˚C/W
N/A
Typical Performance Characteristics
Reverse Voltage Change
Calibrated Error
Reverse Characteristics
Response Time
DS005698-27
DS005698-28
Dynamic Impedance
Noise Voltage
DS005698-29
Thermal Resistance
Junction to Air
DS005698-30
DS005698-31
Thermal Time Constant
DS005698-32
Thermal Response in Still Air
DS005698-33
www.national.com
DS005698-34
4
DS005698-35

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LM235AH 전자부품, 판매, 대치품
Typical Applications (Continued)
Simple Temperature Controller
Simple Temperature Control
DS005698-5
Ground Referred Fahrenheit Thermometer
DS005698-21
Centigrade Thermometer
*Adjust R2 for 2.554V across LM336.
Adjust R1 for correct output.
DS005698-22
*Adjust for 2.7315V at output of LM308
DS005698-23
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