Overview
The LM35CZ/NOPB is a precision integrated-circuit temperature sensor produced by Texas Instruments. This device is calibrated directly in Celsius, offering a linear output voltage that is proportional to the Centigrade temperature. The LM35CZ/NOPB is part of the LM35 series, known for its high accuracy and wide operating temperature range, making it suitable for various applications including power supplies, battery management, HVAC, and appliances.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Scale Factor | 10 | mV/°C |
| Accuracy (at 25°C) | ±0.5 | °C |
| Operating Temperature Range | −40 to 110 | °C |
| Supply Voltage | 4 to 30 | V |
| Quiescent Current | < 60 | μA |
| Self-Heating | < 0.1 | °C (in still air) |
| Non-Linearity | ±¼ | °C (typical) |
| Output Impedance | 0.1 | Ω (for 1-mA load) |
| Package Options | TO-92, SOIC-8, TO-220 |
Key Features
- Calibrated Directly in Celsius: The LM35CZ/NOPB is calibrated directly in Centigrade, eliminating the need for external calibration or trimming.
- Linear Output: The device provides a linear output voltage proportional to the Centigrade temperature with a scale factor of 10 mV/°C.
- High Accuracy: Ensured accuracy of ±0.5°C at 25°C and ±¾°C over the full operating temperature range.
- Wide Operating Range: Rated for operation from −40°C to 110°C.
- Low Power Consumption: Draws less than 60 μA from the supply, resulting in very low self-heating.
- Low Self-Heating: Less than 0.1°C in still air.
- Low Output Impedance: 0.1 Ω for a 1-mA load, making it easy to interface with readout or control circuitry.
- Cost-Effective: Lower cost due to wafer-level trimming and calibration.
Applications
- Power Supplies: Used for temperature monitoring and control in power supply systems.
- Battery Management: Monitors temperature in battery management systems to ensure optimal performance and safety.
- HVAC Systems: Utilized in heating, ventilation, and air conditioning systems for temperature control and monitoring.
- Appliances: Integrated into various household and industrial appliances for temperature sensing and control.
- Remote Applications: Suitable for remote temperature sensing due to its low power consumption and high accuracy.
Q & A
- What is the scale factor of the LM35CZ/NOPB?
The scale factor of the LM35CZ/NOPB is 10 mV/°C.
- What is the accuracy of the LM35CZ/NOPB at 25°C?
The accuracy at 25°C is ±0.5°C.
- What is the operating temperature range of the LM35CZ/NOPB?
The operating temperature range is from −40°C to 110°C.
- What is the supply voltage range for the LM35CZ/NOPB?
The supply voltage range is from 4 V to 30 V.
- How much current does the LM35CZ/NOPB draw from the supply?
The device draws less than 60 μA from the supply.
- What is the self-heating of the LM35CZ/NOPB in still air?
The self-heating is less than 0.1°C in still air.
- What is the output impedance of the LM35CZ/NOPB for a 1-mA load?
The output impedance is 0.1 Ω for a 1-mA load.
- Why is the LM35CZ/NOPB cost-effective?
The device is cost-effective due to wafer-level trimming and calibration.
- In what types of applications is the LM35CZ/NOPB commonly used?
The LM35CZ/NOPB is commonly used in power supplies, battery management, HVAC systems, appliances, and remote temperature sensing applications.
- What are the package options available for the LM35CZ/NOPB?
The device is available in TO-92, SOIC-8, and TO-220 packages.
