LM135 Analog Output Temperature Sensor in Hermetic TO | TI.com

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Analog Output Temperature Sensor in Hermetic TO



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 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 are 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 LMx35 devices are available packaged in hermetic TO transistor packages while the LM335 is also available in plastic


  • Directly Calibrated to the Kelvin Temperature
  • 1°C Initial Accuracy Available
  • Operates from 400 µA to 5 mA
  • Less than 1-Ω Dynamic Impedance
  • Easily Calibrated
  • Wide Operating Temperature Range
  • 200°C Overrange
  • Low Cost


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Part number Order Local sensor accuracy (Max) (+/- C) Operating temperature range (C) Supply voltage (Min) (V) Supply voltage (Max) (V) Supply current (Max) (uA) Sensor gain (mV/Deg C) Rating Features Interface
LM135 Order now 3     -55 to 150     5     3.01     400     10     Catalog       Analog Output    
LM135A Order now 1     -55 to 150     5     2.99     400     10     Catalog       Analog Output    
LM235 Order now 3     -40 to 125     5     3.01     400     10     Catalog       Analog Output    
LM335 Order now 6     -40 to 100     5     3.04     400     10     Catalog       Analog Output    
LM35 Order now 0.5     -40 to 110
-55 to 150
0 to 100
0 to 70    
4     30     114     10     Catalog     UL recognized     Analog Output    
TMP235 Order now 1.2     -40 to 150     2.3     5.5     12     10     Catalog     Industry standard pinout     Analog Output