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Part Number: LM135A
Description: The LM135 series are precision, easily-calibrated, integrated circuit temperature sensors. Operating as a 2-terminal ze...
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LM135A
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General Description
LM135A 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 1W dynamic 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 temperature 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 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.
LM135A Maximum Ratings
Reverse Current 15 mA
Forward Current 10 mA
Storage Temperature
TO-46 Package −60°C to +180°C
TO-92 Package −60°C to +150°C
SO-8 Package −65°C to +150°C
Specified Operating Temp. Range
Continuous Intermittent
(Note 2)
LM135, LM135A −55°C to +150°C 150°C to 200°C
LM235, LM235A −40°C to +125°C 125°C to 150°C
LM335, LM335A −40°C to +100°C 100°C to 125°C
Lead Temp. (Soldering, 10 seconds)
TO-92 Package: 260°C
TO-46 Package: 300°C
SO-8 Package: 300°C
Vapor Phase (60 seconds): 215°C
Infrared (15 seconds): 220°C
Forward Current 10 mA
Storage Temperature
TO-46 Package −60°C to +180°C
TO-92 Package −60°C to +150°C
SO-8 Package −65°C to +150°C
Specified Operating Temp. Range
Continuous Intermittent
(Note 2)
LM135, LM135A −55°C to +150°C 150°C to 200°C
LM235, LM235A −40°C to +125°C 125°C to 150°C
LM335, LM335A −40°C to +100°C 100°C to 125°C
Lead Temp. (Soldering, 10 seconds)
TO-92 Package: 260°C
TO-46 Package: 300°C
SO-8 Package: 300°C
Vapor Phase (60 seconds): 215°C
Infrared (15 seconds): 220°C
LM135A Features
·Directly calibrated in °Kelvin
·1°C initial accuracy available
·Operates from 400 µA to 5 mA
·Less than 1W dynamic impedance
·Easily calibrated
·Wide operating temperature range
·200°C overrange
·Low cost
·1°C initial accuracy available
·Operates from 400 µA to 5 mA
·Less than 1W dynamic impedance
·Easily calibrated
·Wide operating temperature range
·200°C overrange
·Low cost
LM135A
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- Datasheet: LM135A
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