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LM335 Dataheets PDF



Part Number LM335
Manufacturers STMicroelectronics
Logo STMicroelectronics
Description Precision temperature sensor
Datasheet LM335 DatasheetLM335 Datasheet (PDF)

LM135-LM235-LM335 Precision temperature sensors Features ■ Directly calibrated in °K ■ 1°C initial accuracy ■ Operates from 450µA to 5mA ■ Less than 1Ω dynamic impedance Description 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.

  LM335   LM335



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LM135-LM235-LM335 Precision temperature sensors Features ■ Directly calibrated in °K ■ 1°C initial accuracy ■ Operates from 450µA to 5mA ■ Less than 1Ω dynamic impedance Description 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. TO-92 (Plastic package) SO-8 (Plastic micropackage) Pin connections TO-92 (Bottom view) ADJ v+ v- SO-8 (Top view) V+ NC NC ADJ 8 7 6 5 1 2 3 NC NC NC 4 V - February 2008 Rev 3 1/16 www.st.com 16 Schematic diagram 1 Schematic diagram Figure 1. Schematic diagram LM135-LM235-LM335 2 Absolute maximum ratings Table 1. Absolute maximum ratings (AMR) Symbol Parameter LM135 LM235 LM335LM335A Unit Current IR IF Reverse Forward Toper Operating free-air temperature range(1) Continuous Intermittent Tstg Storage temperature range 1. Tj ≤ 150°C 15 mA 10 °C -55 to +150 -40 to +125 -40 to +100 +150 to +200 +125 to +150 +100 to +125 -65 to +150 °C 2/16 LM135-LM235-LM335 3 Temperature accuracy Temperature accuracy Table 2. Temperature accuracy Parameter Operating output voltage Tcase = +25°C, IR = 1mA Uncalibrated temperature error (IR = 1mA) Tcase = +25°C Tmin ≤ Tcase ≤ Tmax Temperature error with 25°C calibration Tmin ≤ Tcase ≤ Tmax., IR = 1mA LM135 - LM235 LM335 LM335A Calibrated error at extended temperature Tcase = Tmax (intermittent) Non-linearity (IR = 1mA) LM135 - LM235 LM335 LM335A LM135 - LM235 LM335A LM335 Unit Min. Typ. Max. Min. Typ. Max. 2.95 2.98 3.01 2.92 2.98 3.04 V 1 3 2 5 4 6 °C 5 9 0.5 1.5 0.5 1 2 0.3 1 0.3 1.5 °C 1 2 2 °C °C 0.3 1.5 4 Electrical characteristics Table 3. Electrical characteristics Parameter LM135 - LM235 LM335-LM335A Unit Min. Typ. Max. Min. Typ. Max. Operating output voltage change with current 450µA ≤ IR ≤ 5mA at constant temperature Dynamic impedance (IR = 1mA) Output voltage temperature drift Time constant Still air Air 0.5m/s Stirred oil Time stability (Tcase = +125°C) 2.5 10 0.5 +10 80 10 1 0.2 3 14 mV 0.6 Ω +10 mV/°C 80 s 10 1 0.2 °C/kh Note: Accuracy measurements are made in a well-stirred oil bath. For other conditions, selfheating must be considered 3/16 Electrical characteristics Figure 2. Reverse voltage change LM135-LM235-LM335 Figure 3. Calibrated error Calibrated error (°C) Reverse voltage change (mV) Reverse current (mA) Figure 4. Reverse characteristics Temperature (°C) Figure 5. Response time Voltage swing (V) Reverse current (mA) Reverse voltage (V) Figure 6. Dynamic impedanc.


ESM4001 LM335 LM335A


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