Overview
The LM335AH is a precision temperature sensor produced by National Semiconductor. It operates as a 2-terminal zener diode, with its 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.
Key Specifications
| Parameter | LM335AH | Units |
|---|---|---|
| Operating Temperature Range | −40°C to +100°C | °C |
| Operating Current Range | 400 µA to 5 mA | A |
| Dynamic Impedance | < 1 Ω | Ω |
| Output Voltage at 25°C | 2.95 to 3.01 V | V |
| Temperature Coefficient | +10 mV/°K | mV/°K |
| Storage Temperature Range | −60°C to +150°C | °C |
| Lead Temperature (Soldering, 10 seconds) | 260°C (TO-92 Package) | °C |
| Calibrated Error at 25°C | < 1°C | °C |
Key Features
- Directly calibrated in °Kelvin
- 1°C initial accuracy available
- Operates from 400 µA to 5 mA
- Less than 1 Ω dynamic impedance
- Easily calibrated
- Wide operating temperature range
- Linear output
- Low cost
Applications
The LM335AH is suitable for a wide range of temperature sensing applications, including industrial, automotive, and aerospace environments. Its linear output and low impedance make it particularly useful for interfacing with readout or control circuitry. Typical applications include temperature monitoring in electronic devices, environmental monitoring, and process control systems.
Q & A
- What is the operating temperature range of the LM335AH?
The LM335AH operates from −40°C to +100°C.
- What is the typical output voltage of the LM335AH at 25°C?
The typical output voltage at 25°C is between 2.95 V and 3.01 V.
- What is the dynamic impedance of the LM335AH?
The dynamic impedance is less than 1 Ω.
- How accurate is the LM335AH after calibration at 25°C?
The LM335AH has a typical error of less than 1°C after calibration at 25°C.
- What are the common packages available for the LM335AH?
The LM335AH is available in hermetic TO-46 transistor packages and plastic TO-92 packages.
- What is the temperature coefficient of the LM335AH?
The temperature coefficient is +10 mV/°K.
- Can the LM335AH be used in high-temperature environments?
Yes, it can operate up to 100°C continuously and up to 125°C intermittently.
- How does the LM335AH handle self-heating?
Self-heating must be considered, especially in conditions other than a well-stirred oil bath.
- Is the LM335AH suitable for military and aerospace applications?
Yes, it is available in military-grade packages and specifications.
- What is the storage temperature range for the LM335AH?
The storage temperature range is −60°C to +150°C.
