Temperature Sensor - LM335A

Temperature Sensor - LM335A
  • Výrobce: SparkFun
  • Kat. číslo výrobce: SEN-09438
  • Hmotnost: <1g
  • Záruka (měsíců): 24
Kód produktu: SP93
Cena bez DPH: 14,00 Kč
Cena s DPH: 16,94 Kč
Dostupnost: Vyřazeno

Temperature Sensor - LM335A

The LM335A has been replaced by newer part TMP36 - Temperature Sensor.

Description: The LM335A is a simple to use, low cost but precise analog temperature sensor. The temperature sensor LM335A operates as a Zener diode with a breakdown voltage proportional to absolute temperature at 10mV/°K. You can just hook up a resistor 1kOhm from 5V and connect GND - and the LM335A will output an analog voltage of 2,98V (298 Kelvin is 25°C or room temperature).  The output of the sensor is linear, and when calibrated at 25°C the LM335A has typically less than 1°C error over a 100°C temperature range. The sensor can operate continuously from −40°C to 100°C.

LM335A Basic Circuit

The LM335A provides an easy method of calibrating the device for higher accuracies. The calibration of the sensor requires a connection of pot across the sensor (check Datasheet - page 6), with the wiper of the potentiometer connected to the adjustment pin of the LM335.

The sensor comes in a through-hole, TO-92 package.

Here is a simple calculator for temperature conversion from Kelvin to Degrees Celsius.



  • Directly calibrated in °Kelvin
  • Operates from 400 μA to 5 mA
  • Less than 1Ω dynamic impedance
  • Easily calibrated
  • Wide operating temperature range
  • Low cost



TO-92 package - check Datasheet



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