-LM35 is an integrated analog temperature sensor whose electrical output is proportional to Degree Centigrade.
-LM35 Sensor does not require any external calibration or trimming to provide typical accuracies.
-The LM35’s low output impedance, linear output, and precise inherent calibration make interfacing to readout or control circuitry especially easy.
-As such no extra components required to interface LM35 to ADC as the output of LM35 is linear with 10mv/degree scale.
-It can be directly interfaced to any 10 or 12 bit ADC.
-But if you are using an 8-bit ADC like ADC0808 or ADC0804 an amplifier section will be needed if you require to measure 1°C change.
-LM35 can also be directly connected to Arduino.
-The output of LM35 temperature can also be given to comparator circuit and can be used for over temperature indication or by using a simple relay can be used as a temperature controller.
-The LM35 device is rated to operate over a −55°C to 150°C temperature range, while the LM35C device is rated for a −40°C to 110°C range (−10° with improved accuracy).
-The LM35-series devices are available packaged in hermetic TO transistor packages, while the LM35C, LM35CA, and LM35D devices are available in the plastic TO-92 transistor package.
-The LM35D device is available in an 8-lead surface-mount small-outline package and a plastic TO-220 package.
Features:
-Calibrated directly in Degree Celsius (Centigrade)
-Linear at 10.0 mV/°C scale factor
-0.5°C accuracy guarantee-able (at a25°C)
-Suitable for remote applications
-Low cost due to wafer-level trimming
-Operates from 4 to 30 volts
-Less than 60 mA current drain
-Low self-heating, 0.08°C in still air
-Non-linearity only 0.25°C typical
-Low impedance output, 0.1Ωfor 1 mA load
| SPECIFICATIONS: |
|
| Package/Case |
TO-92-3 |
| Mounting
Style |
Through Hole |
| Sensor
Type |
Temperature Sensor |
| Output
Type |
Analog Voltage |
| Maximum
Supply Voltage |
30 V |
| Minimum
Supply Voltage |
4V |
| Operating
Temperature Range |
-55ºC to +150ºC |
| Shipment
Dimensions |
8 × 5 × 3 cm |
OVERVIEW:
-Calibrated directly in Degree Celsius (Centigrade)
-Linear at 10.0 mV/°C scale factor
-0.5°C accuracy guarantee-able (at a25°C)
-Suitable for remote applications
-Low cost due to wafer-level trimming
-Operates from 4 to 30 volts
-Less than 60 mA current drain
-Low self-heating, 0.08°C in still air
-Non-linearity only 0.25°C typical
PACKAGE INCLUDES:
1 PCS x Lm35 To92 Package Temperature Sensors
https://www.ti.com/product/LM35
//SOURCE CODE TAKEN FROM BELOW LINK
//https://www.electronicwings.com/arduino/lm35-interfacing-with-arduino-uno
const int lm35_pin = A1; /* LM35 O/P pin */
void setup() {
Serial.begin(9600);
}
void loop() {
int temp_adc_val;
float temp_val;
temp_adc_val = analogRead(lm35_pin); /* Read Temperature */
temp_val = (temp_adc_val * 4.88); /* Convert adc value to equivalent voltage */
temp_val = (temp_val/10); /* LM35 gives output of 10mv/°C */
Serial.print("Temperature = ");
Serial.print(temp_val);
Serial.print(" Degree Celsius\n");
delay(1000);
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