Overview
The LM35CAH/NOPB is a precision integrated-circuit temperature sensor produced by Texas Instruments. This device is calibrated directly in Celsius, providing a linear output voltage that is proportional to the Centigrade temperature. It does not require any external calibration or trimming, making it a convenient and accurate solution for temperature measurement. The LM35CAH/NOPB operates over a wide temperature range of −40°C to 110°C and is suitable for various applications due to its low cost, low self-heating, and low current drain.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Temperature Range | −40°C to 110°C | °C |
| Scale Factor | 10 mV/°C | mV/°C |
| Accuracy at 25°C | ±0.5°C | °C |
| Supply Voltage | 4 V to 30 V | V |
| Current Drain | < 60 µA | µA |
| Self-Heating | < 0.1°C in still air | °C |
| Output Impedance | 0.1 Ω for 1-mA load | Ω |
| Non-Linearity | ±¼°C typical | °C |
| Package Types | TO-92, TO-220, SOIC-8 |
Key Features
- Calibrated directly in Celsius, eliminating the need for external calibration or trimming.
- Linear output voltage proportional to Centigrade temperature with a scale factor of 10 mV/°C.
- High accuracy with ±0.5°C at 25°C and ±¾°C over the full temperature range.
- Low cost due to wafer-level trimming and calibration.
- Operates from a single power supply or with plus and minus supplies.
- Low current drain of less than 60 µA, resulting in minimal self-heating.
- Low output impedance of 0.1 Ω for a 1-mA load, making it easy to interface with readout or control circuitry.
- Suitable for remote applications due to its robust design and wide operating temperature range.
Applications
- Power supplies: For temperature monitoring and control in power supply units.
- Battery management: To monitor battery temperature for optimal performance and safety.
- HVAC (Heating, Ventilation, and Air Conditioning): For temperature control and monitoring in HVAC systems.
- Appliances: Used in various household and industrial appliances to monitor and control temperature.
Q & A
- What is the temperature range of the LM35CAH/NOPB?
The LM35CAH/NOPB operates over a temperature range of −40°C to 110°C.
- What is the scale factor of the LM35CAH/NOPB?
The scale factor is 10 mV/°C.
- What is the accuracy of the LM35CAH/NOPB at 25°C?
The accuracy at 25°C is ±0.5°C.
- What is the supply voltage range for the LM35CAH/NOPB?
The device operates from 4 V to 30 V.
- How much current does the LM35CAH/NOPB draw?
The current drain is less than 60 µA.
- What is the self-heating of the LM35CAH/NOPB in still air?
The self-heating is less than 0.1°C in still air.
- What are the available package types for the LM35CAH/NOPB?
The device is available in TO-92, TO-220, and SOIC-8 packages.
- Is the LM35CAH/NOPB suitable for remote applications?
- Does the LM35CAH/NOPB require external calibration or trimming?
No, it does not require any external calibration or trimming.
- What are some common applications of the LM35CAH/NOPB?
Common applications include power supplies, battery management, HVAC systems, and various household and industrial appliances.
