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
|Operating Temperature Range (C)|
|Local Sensor Accuracy (Max) (+/- C)|
|Supply Voltage (Min) (V)|
|Supply Voltage (Max) (V)|
|Package Size: mm2:W x L (PKG)|
|Analog Output||Analog Output||Analog Output||Analog Output|
|-40 to 125||-55 to 150||-55 to 150||-40 to 100|
|3TO: 35 mm2: 5.44 x 6.41(TO)||3TO: 35 mm2: 5.44 x 6.41(TO)||3TO: 35 mm2: 5.44 x 6.41(TO)||
8SOIC: 29 mm2: 6 x 4.9(SOIC)
3TO: 35 mm2: 5.44 x 6.41(TO)
3TO-92: 19 mm2: 3.68 x 5.2(TO-92)