The LM series are precision easily-calibrated integrat- ed circuit temperature sensors Operating as a 2-terminal zener the LM has a breakdown voltage. lm are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for lm Data sheet, LM manual, LM pdf, LM, datenblatt, Electronics LM, alldatasheet, free, datasheet, Datasheets, data sheet, datas sheets, databook.

Author: Vubei Daijar
Country: Lesotho
Language: English (Spanish)
Genre: Automotive
Published (Last): 3 January 2013
Pages: 425
PDF File Size: 14.86 Mb
ePub File Size: 8.24 Mb
ISBN: 843-7-47733-688-9
Downloads: 86938
Price: Free* [*Free Regsitration Required]
Uploader: Nera

The output pin provides an analog voltage output that is linearly proportional to the fahrenheit temperature. So you circuit connections are: Since the output pin can give out a maximum of 5 voltsrepresents the full possible range it can give out.

Pin 3 is the ground pin and connects to the ground GND terminal of the arduino. Once this analog voltage in millivolts is calculated, we then can find the temperature in kelvin by the equation: We can now write code in the processing software to give instructions to the arduino.

This translates into the circuit schematic: The difference between an LM and LM34 and LM35 temperature sensors is the LM sensor gives out the temperature in degrees Kelvin, while the LM35 sensor gives out the temperature in degrees Celsius and the LM34 sensor gives out the temperature in degrees Fahrenheit.

LM35 Temperature Sensor – Datasheet & Pin Diagram

This will be the raw value divided by times Before ln355 can get a Kevlin reading of the temperature, the analog output voltage must first be read.

This allows us to calibrate the temperature sensor if we want a more precise temperature readout. We attach this pin to analog pin A0 of the arduino board. Pin 2 is the output pin. You can adjust this value to meet your personal preference or program needs. So, for example, if the output pin, pin 2, gives out a value of mV 0. So if the LM is giving an output reading of 2.


Once we obtain this Celsius value, we can convert into Fahrenheit with the datashdet equation: This output reading of This is ideal because the arduino’s power pin gives out 5V of power. The IC has just 3 pins, 2 for the power supply and one for the analog output. We can then easily convert this value into fahrehnheit and celsius by plugging in the appropriate conversion equations.

LM Datasheet pdf – Precision Temperature Sensor – National Semiconductor

As a temperature sensor, the circuit will read the temperature of the surrounding environment and relay this temperature to us back in degrees Kelvin. It is divided by because a span of occupies 5V. The arduino, with suitable code, can then interpret this measured analog voltage and output to us the temperature in degrees Kelvin, Celsius, and Fahrenheit.

Pin 1 is the Adjustable Pin Adj. The arduino will then read this measured value from the LM and translate into degrees kelvin, fahrenheit and celsius, which we will be datwsheet to read from the computer from the arduino serial monitor. The raw voltage over this value therefore represents the ratio of how much power the output pin is outputting against this full range.

National Semiconductor

All 3 are calibrated different to output the millivolt voltage reading in proportional l3m55 these different units of measurement. The code is shown below.

In this project, we will demonstrate how to build temperature sensor circuit using a LM datashert. So to get the degree value in fahrenheit, all that must be done is to take the voltage output and divide it by this give out the value degrees in fahrenheit. Below is the pinout of the LM IC: We can use any type of arduino board. This is because there is millvolts in 5 volts.

  ANSI AMCA 210 07 PDF

This is so that we can hook our arduino to a computer and send it code that it can run to display to us the temperature. Now the computer is connected to the arduino. Temperature Sensor Circuit The temperature sensor circuit we will build is shown below: We will integrate this with the arduino to measure the temperature.

The type B side of the connector goes into the arduino and the type A side into the USB port of the computer. All we must do is write this code and upload it to the arduino to datahseet this kelvin temperature into fahrenheit and celsius.

View lm355 datasheet:

We get the ratio of the raw value to the full span of and then multiply it by to get the millivolt value. This is the datasheet of the LM IC: Pin 2 gives an output of 1 millivolt per 0.

Once we have this ratio, we then multiply it by to give the millivolt value. All you have to do is take the output reading and divide it by 10 in order to get the temperature output reading.