27 August 2019

LM35 pinout | Introduction | Features | Working | Advantage | Application

As we know that there are available in various forms of 555 timers, single logic gates, microcontroller, microprocessor, voltage regulator and op-amps like different ICs IC  LM741, LM339 ICLM358, LM338LM337, LM7805, and many more ICs are available. LM35 is a precision of IC is a temperature sensor with its output is proportional to the temperature, in the form of Celcius. This IC is most commonly used in an industrial and commercial building where high accuracy of temperature measuring is needed. Here this gives the information about basic introduction about LM35, specification of LM35, Pinout of LM35 and application about LM35, advantages, and lastly working of IM35. Let us have a deep insight into the brief understanding of IM35 pinout. 

Introduction to LM35 :

  • LM35 is a commonly used in temperature sensor, It shows values in the form of output voltage instead of degree celsius. 
  • It does not require any external calibration circuitry.
  • LM35 shows high voltage values than thermocouple and may not need that the output voltage is amplified.
  • The sensitivity of LM35 is 10mV/degree celsius. As the temperature increases, the output voltage also increases.
  • One of the most important characteristics is that it draws just 60uA from its supply and acquires a low heating capacity.
  • The output voltage is always is proportional to the Celsius temperature. The scale factor is .01 V/ C
  • The LM35 temperature sensor is available in many different packages like TO-92 plastic package form, 8 lead surface mount SO-8 small outline package. 
  • LM35 gives temperature output is more precise than thermistor output.

LM35 Pinout Diagram :

LM35 has three pinouts which are given below with figure:

PIN 1: Vcc, it is used as input at this pin we supply +5V input voltage.
PIN 2: At this pin, we get output voltage.
PIN 3: This pin is used for ground.

LM35 pinout diagram

 LM35 Features :

  • Low-cost temperature sensor.
  • Minimum and maximum voltages are 35V and -2V respectively, Typically 5V.
  • Drain current is less than 60uA.
  • Small and hence suitable for remote applications.
  • 0.5 C accuracy guarantee able
  • Can measure temperature ranging from -55 ̊ C to 150 ̊ C.
  • Available in TO-92, TO-220, TO-CAN and SOIC package.
  • The output voltage is directly proportional to temperature there will be a rise of 10mV for every 1 ̊ C rise in temperature.
  • Suitable for remote applications.

LM35 Working :

  • LM35 is a precision of temperature sensor with its output is proportional to the temperature. The sensor is circuitry is sealed and therefore it does not subject to oxidation and other processes. 
  • LM35 temperature can be measured more accurately than with a thermistor. 
  • The output voltage range of this sensor is from -55 to 150 C.  It also has low self-heating power.
  • Operating voltage is 4 to 30 Volts.
  • This sensor is used with an operational amplifier which amplifies a voltage at a certain level.  
  • In operational amplifier there are three terminals, first two are inverting and non-inverting input and the third one is used for the output. 
  • So by using the IC LM35 with an operational amplifier, we can get amplification of output voltages of LM35.
LM35 Working Diagram

LM35 Advantages:

  • Low self-heating.
  • This IC and circuit are not too much complected.
  • It does not require signal conditioning.
  • It requires only 4 to 30 V voltage.

LM35 Applications :

  • It is used for measuring the temperature of a particular environment.
  • Monitoring battery temperature and also provides battery protection from overheating.
  • Providing thermal shutdown for a circuit or a component used in a specific project.
  • It can be used for measuring temperature for HVAC transmission.

Conclusions :

Here this post gives the all about information of IC LM 35 like pinout, applications, advantages, and features. We hope you all understand this topic. Furthermore, query regarding your project please give your feedback by commenting in the comment sections.