ST LM335ADT

The LM135,LM235,LM335 are precision temperature sensors which can be easily calibrated. They operate as a 2-terminal Zener and the breakdown voltage is directly proportional to the absolute temperature at 10mV / °K. The circuit has a dynamic impedance of less than 1Ω and operates within a range of current from 450μA to 5mA without alteration of its characteristics. Calibrated at +25°C, the LM135,LM235,and LM335 have a typical error of less than 1°C over a 100°C temperature range. Unlike other sensors, the LM135,LM235,LM335 have a linear output.

• Directly calibrated in °K
• 1°C initial accuracy
• Operates from 450μA to 5mA
• Less than 1Ω dynamic impedance

• Accuracy improvable via single-point calibration
• Self-heating must be considered; operate at low current sufficient to drive the sensor and calibration circuit up to maximum operating temperature
• If ambient thermal resistance is constant, self-heating error can be corrected through external calibration (using temperature-stable current bias)
• Suitable for basic temperature sensing, calibrated sensor applications, average temperature sensing, isolated temperature sensing, simple temperature controllers, Celsius thermometers, differential temperature sensing, thermocouple cold-junction compensation, and more