LM335 Temperature Sensor

Pin Configuration

Pin No.	Pin Name	Description
1	Adj	Calibration adjust pin
2	+	Positive Input/ Output pin
3	-	Negative output/ Ground

 

Features

• Cheap and Easy to Calibrate
• Dynamic Impedance is less than 1 ohms.
• 200 °C Over range
• 1°C Initial Accuracy Available
• Directly calibrated to kelvin temperature scale
• Operating current range 400uA to 5mA

 

Technical Specification

• Reverse Current: 15mA
• Forward Current: 10mA
• Operating Output Voltage: 2.95V to 3.01V
• Temperature Error (at 25°C): 2°C (max)
• Thermal Resistance: 202°C/W
• Specified Temperature Range: -40 to 100°C
• Storage Temperature Range: -60 to 150°C

 

Note: Complete technical details can be found in the LM335 Datasheet linked at the bottom of this page.

 

Equivalent to LM335

LM135, LM135A, LM235, LM235A,

 

Brief Description

LM335 sensor is precision temperature sensor which can be easily calibrated. It has a breakdown voltage directly proportional to absolute temperature at 10mV/°K. LM335 has a low dynamic impedance. It can be used for any type of temperature sensing in range of -40°C to 100°C.

 

Internal Diagram

 

How to Use?

Using a LM335 sensor is easy, just connect the circuit as per the below circuit diagram. There are two ways to use LM335 sensor, one is as basic temperature sensor and another is calibrated. To calibrate LM335 connect the ADJ pin to a 10K Potentiometer and adjust accordingly. When LM335 calibrated at 25°C, it has typically less than 1°C error over 100°C. It gives a linear output.

 

Application

• Power Supplies
• Battery management
• HVAC
• Appliances

 

2D-Model and Dimensions