Overview
The LM135H/NOPB from Texas Instruments is a precision analog output temperature sensor. It operates as a 2-terminal zener diode with a breakdown voltage directly proportional to absolute temperature at 10 mV/°K. This sensor is known for its high accuracy, ease of calibration, and wide operating temperature range of −55°C to 150°C. The LM135H/NOPB is packaged in a hermetic TO-46 package, ensuring reliability and durability in various environmental conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature Range | −55 to 150 | °C |
| Forward Current | 0.4 to 5 | mA |
| Temperature Slope | 10 | mV/°K |
| Dynamic Impedance | < 1 | Ω |
| Storage Temperature | −60 to 150 | °C |
| Junction-to-Ambient Thermal Resistance | 202 | °C/W |
| Package Type | TO-46 | |
| Package Body Size | 4.699 mm × 4.699 mm |
Key Features
- Directly Calibrated to the Kelvin Temperature Scale: The LM135H/NOPB is calibrated to the Kelvin temperature scale, providing accurate temperature readings.
- High Accuracy: Typically less than 1°C error over a 100°C temperature range when calibrated at 25°C.
- Low Dynamic Impedance: Less than 1-Ω dynamic impedance, ensuring minimal impact on performance across the operating current range.
- Easily Calibrated: A simple one-point calibration method using the ADJ pin allows for higher accuracy.
- Wide Operating Temperature Range: Operates from −55°C to 150°C, making it suitable for a variety of applications.
- Linear Output: The output voltage is linearly proportional to the absolute temperature, facilitating easy interfacing with readout or control circuitry.
Applications
- Power Supplies: Used for temperature monitoring and control in power supply systems.
- Battery Management: Essential for monitoring battery temperatures in various battery management systems.
- HVAC Systems: Utilized in heating, ventilation, and air conditioning systems for precise temperature control.
- Appliances: Found in various household and industrial appliances where temperature sensing is critical.
Q & A
- What is the operating temperature range of the LM135H/NOPB?
The LM135H/NOPB operates over a temperature range of −55°C to 150°C. - What is the typical forward current for the LM135H/NOPB?
The typical forward current range is from 0.4 mA to 5 mA. - How is the temperature output of the LM135H/NOPB calibrated?
The temperature output can be calibrated using a one-point calibration method with the ADJ pin. - What is the dynamic impedance of the LM135H/NOPB?
The dynamic impedance is less than 1 Ω. - In what package is the LM135H/NOPB available?
The LM135H/NOPB is available in a hermetic TO-46 package. - What is the junction-to-ambient thermal resistance of the LM135H/NOPB?
The junction-to-ambient thermal resistance is 202 °C/W. - What are some common applications of the LM135H/NOPB?
Common applications include power supplies, battery management, HVAC systems, and appliances. - How accurate is the LM135H/NOPB?
Typically, the LM135H/NOPB has less than 1°C error over a 100°C temperature range when calibrated at 25°C. - What is the storage temperature range for the LM135H/NOPB?
The storage temperature range is from −60°C to 150°C. - Is the LM135H/NOPB RoHS compliant?
Yes, the LM135H/NOPB is available in both RoHS and non-RoHS versions.
