Overview
The LMT90DBZR, manufactured by Texas Instruments, is a precision analog output temperature sensor designed for a wide range of applications. This device is particularly notable for its ability to measure temperatures from -40°C to +125°C with a linear output voltage that corresponds directly to the Celsius temperature scale. The LMT90DBZR is housed in a compact SOT-23 package, making it suitable for space-constrained applications. Its primary market includes industrial, automotive, and consumer electronics sectors where accurate temperature monitoring is crucial.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 4.5 to 10 | V | |
| Supply Current | 130 | µA | Max |
| Temperature Range | -40 to +125 | °C | |
| Output Voltage | +100mV to +1.75V | V | Corresponds to temperature range |
| Accuracy | ±3°C (room temp), ±4°C (full range) | °C | |
| Package | SOT-23 | 3-pin |
Key Features
- Linear output: +10mV/°C with a +500mV offset for negative temperature readings.
- No external calibration required; factory-calibrated for high accuracy.
- Low self-heating: less than 0.2°C in still air.
- Ideal for single-supply operation, simplifying circuit design.
- Cost-effective alternative to thermistors.
Applications
The LMT90DBZR is widely used in various sectors due to its reliability and precision. In industrial settings, it is utilized for temperature monitoring in machinery and process control systems. In the automotive industry, it helps in managing engine and cabin temperatures. Consumer electronics benefit from its compact size and accuracy in devices like smartphones and home appliances. Its ability to operate over a wide temperature range and its ease of integration make it a versatile choice for many temperature sensing applications.
Q & A
1. What is the operating temperature range of the LMT90DBZR?
The LMT90DBZR operates from -40°C to +125°C.
2. What is the output voltage range of the LMT90DBZR?
The output voltage ranges from +100mV to +1.75V, corresponding to the temperature range.
3. Does the LMT90DBZR require external calibration?
No, the LMT90DBZR is factory-calibrated and does not require external calibration.
4. What is the supply voltage range for the LMT90DBZR?
The supply voltage ranges from 4.5V to 10V.
5. What is the accuracy of the LMT90DBZR?
It has an accuracy of ±3°C at room temperature and ±4°C over the full temperature range.
6. What package does the LMT90DBZR come in?
The LMT90DBZR is available in a 3-pin SOT-23 package.
7. Can the LMT90DBZR measure negative temperatures?
Yes, it can measure negative temperatures due to its +500mV offset voltage.
8. What is the supply current of the LMT90DBZR?
The maximum supply current is 130µA.
9. Is the LMT90DBZR suitable for battery-powered applications?
Yes, its low supply current makes it suitable for battery-powered applications.
10. What are typical applications for the LMT90DBZR?
Typical applications include industrial temperature monitoring, automotive temperature management, and consumer electronics.
