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LM335 Datasheet(PDF) 1 Page - National Semiconductor (TI)

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Part No. LM335
Description  Precision Temperature Sensors
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com

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December 17, 2008
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 1
Ω dy-
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 sensors
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 interfacing 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 tem-
perature range. The LM335 operates from −40°C to 100°C.
The LM135/LM235/LM335 are available packaged in hermet-
ic TO-46 transistor packages while the LM335 is also avail-
able in plastic TO-92 packages.
Directly calibrated in °Kelvin
1°C initial accuracy available
Operates from 400 μA to 5 mA
Less than 1Ω dynamic impedance
Easily calibrated
Wide operating temperature range
200°C overrange
Low cost
Schematic Diagram
© 2008 National Semiconductor Corporation

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