Overview
The LM235Z is a precision temperature sensor produced by STMicroelectronics. It operates as a 2-terminal Zener diode, with the breakdown voltage directly proportional to the absolute temperature at 10mV/°K. This sensor is known for its ease of calibration and high accuracy, making it suitable for a wide range of temperature sensing applications. The LM235Z has a dynamic impedance of less than 1Ω and can operate within a current range of 450µA to 5mA without any significant change in its characteristics.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Sensor Output Type | Analogue | |
| Sensing Accuracy Range | 0°C to +0.5°C | |
| Accuracy | ±1.5°C | |
| Sensing Temperature Min | -40°C | |
| Sensing Temperature Max | +125°C | |
| Measured Temperature Min | -40°C | |
| Measured Temperature Max | +125°C | |
| Sensor Case / Package | TO-92 | |
| No. of Pins | 3 | |
| Supply Voltage Min | 2.92V | |
| Supply Voltage Max | 3.04V | |
| Operating Temperature Min | -40°C | |
| Operating Temperature Max | +125°C |
Key Features
- Directly calibrated in °K
- Operates from 450µA to 5mA
- 1°C initial accuracy
- Less than 1Ω dynamic impedance
- Linear output proportional to absolute temperature at 10mV/°K
- Easily calibrated for higher accuracies
Applications
The LM235Z is suitable for various temperature sensing and instrumentation applications, including:
- Industrial temperature monitoring
- Temperature control systems
- Centigrade thermometers
- Differential temperature sensing
- Thermocouple cold junction compensation
- Simple temperature controllers
Q & A
- What is the operating temperature range of the LM235Z?
The LM235Z operates over a temperature range of -40°C to +125°C.
- What is the sensor output type of the LM235Z?
The sensor output type is analogue.
- What is the accuracy of the LM235Z?
The accuracy is ±1.5°C.
- What is the dynamic impedance of the LM235Z?
The dynamic impedance is less than 1Ω.
- How does the LM235Z operate?
The LM235Z operates as a 2-terminal Zener diode, with the breakdown voltage directly proportional to the absolute temperature at 10mV/°K.
- What is the current range for the LM235Z?
The LM235Z operates within a current range of 450µA to 5mA.
- Can the LM235Z be easily calibrated?
- What package type is the LM235Z available in?
The LM235Z is available in a TO-92 package.
- What are some typical applications of the LM235Z?
Typical applications include industrial temperature monitoring, temperature control systems, centigrade thermometers, differential temperature sensing, and thermocouple cold junction compensation.
- How does self-heating affect the accuracy of the LM235Z?
