Overview
The LM335AH/NOPB is a precision temperature sensor produced by Texas Instruments. This device operates as a 2-terminal zener diode, with its breakdown voltage directly proportional to absolute temperature at 10 mV/°K. It is designed for accurate temperature sensing over a wide range and is particularly noted for its low impedance and linear output, making it easy to interface with readout or control circuitry.
The LM335AH/NOPB is part of the LMx35 series, which includes various models with different temperature ranges. The LM335AH specifically operates from −40°C to 100°C, making it suitable for a variety of applications where precise temperature measurement is critical.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Operating Temperature Range | −40 | 100 | °C | |
| Storage Temperature Range | −60 | 150 | °C | |
| Forward Current | 0.4 | 1 | 5 | mA |
| Reverse Current | 15 | mA | ||
| Operating Output Voltage at 25°C, IR = 1 mA | 2.92 | 2.98 | 3.04 | V |
| Uncalibrated Temperature Error at 25°C, IR = 1 mA | 1 | 3 | 6 | °C |
| Dynamic Impedance at IR = 1 mA | 0.5 | 0.6 | Ω | |
| Output Voltage Temperature Coefficient | 10 | mV/°C | ||
| Junction-to-Ambient Thermal Resistance (TO-92 package) | 202 | °C/W |
Key Features
- Linear Output: The LM335AH/NOPB has a linear output voltage that is directly proportional to absolute temperature, making it easy to interpret temperature readings.
- Low Impedance: The device has a dynamic impedance of less than 1 Ω, ensuring minimal impact on the circuit it is connected to.
- Wide Operating Range: It operates over a temperature range of −40°C to 100°C, making it versatile for various applications.
- Calibration Capability: The device includes an easy method for one-point calibration to enhance accuracy over the full temperature range.
- Compact Packaging: Available in TO-92 packages, which are compact and suitable for a wide range of applications.
Applications
- Temperature Sensing: The LM335AH/NOPB is ideal for any type of temperature sensing application within its operating range.
- Power Supplies: Used in power supply units to monitor temperature and ensure safe operating conditions.
- Battery Management: Employed in battery management systems to monitor battery temperature.
- HVAC Systems: Utilized in heating, ventilation, and air conditioning systems for temperature control and monitoring.
- Appliances: Integrated into various household and industrial appliances to monitor and control temperature.
Q & A
- What is the operating temperature range of the LM335AH/NOPB?
The LM335AH/NOPB operates over a temperature range of −40°C to 100°C.
- What is the typical output voltage of the LM335AH/NOPB at 25°C?
The typical output voltage at 25°C with a current of 1 mA is 2.98 V.
- How does the LM335AH/NOPB achieve calibration?
The device can be calibrated using a one-point calibration method involving a pot connected across the LM335AH/NOPB with the arm tied to the adjustment terminal.
- What is the dynamic impedance of the LM335AH/NOPB?
The dynamic impedance is less than 1 Ω.
- What is the output voltage temperature coefficient of the LM335AH/NOPB?
The output voltage temperature coefficient is 10 mV/°C.
- In what package is the LM335AH/NOPB available?
The LM335AH/NOPB is available in a TO-92 package.
- What are some common applications of the LM335AH/NOPB?
Common applications include temperature sensing, power supplies, battery management, HVAC systems, and household appliances.
- What is the junction-to-ambient thermal resistance of the LM335AH/NOPB in a TO-92 package?
The junction-to-ambient thermal resistance is 202 °C/W.
- Is the LM335AH/NOPB RoHS compliant?
Yes, the LM335AH/NOPB is RoHS compliant.
- What is the forward current range of the LM335AH/NOPB?
The forward current range is from 0.4 mA to 5 mA.
