Overview
The LM335Z/NOPB is a precision integrated circuit temperature sensor produced by Texas Instruments. It operates as a 2-terminal zener diode, with a breakdown voltage directly proportional to absolute temperature at 10 mV/°K. This sensor is part of the LMx35 series, known for its high accuracy and ease of calibration. The LM335Z/NOPB is particularly suited for temperature sensing applications over a wide range, offering a linear output that simplifies interfacing with readout or control circuitry.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature Range | -40 to 100 | °C |
| Current Range | 400 μA to 5 mA | |
| Dynamic Impedance | Less than 1 Ω | |
| Initial Accuracy | Typically less than 1°C | |
| Package Type | TO-92 (LP) | |
| Pins | 3 | |
| Thermal Resistance (Junction-to-Ambient) | 202 | °C/W |
Key Features
- Directly calibrated to the Kelvin temperature scale
- 1°C initial accuracy available
- Operates from 400 μA to 5 mA
- Less than 1-Ω dynamic impedance
- Easily calibrated
- Wide operating temperature range
- 200°C overrange capability
- Low cost
Applications
The LM335Z/NOPB is versatile and can be used in a variety of temperature sensing applications, including:
- Power supplies
- Battery management systems
- HVAC (Heating, Ventilation, and Air Conditioning) systems
- Appliances
The sensor's linear output and low impedance make it particularly suitable for interfacing with readout or control circuitry.
Q & A
- What is the operating temperature range of the LM335Z/NOPB?
The LM335Z/NOPB operates from -40°C to 100°C.
- What is the current range for the LM335Z/NOPB?
The device operates over a current range of 400 μA to 5 mA.
- What is the dynamic impedance of the LM335Z/NOPB?
The dynamic impedance is less than 1 Ω.
- How accurate is the LM335Z/NOPB at room temperature?
Typically, the LM335Z/NOPB has less than 1°C error when calibrated at 25°C.
- What package types are available for the LM335Z/NOPB?
The LM335Z/NOPB is available in TO-92 (LP) packages.
- What is the thermal resistance of the LM335Z/NOPB?
The junction-to-ambient thermal resistance is 202 °C/W.
- Can the LM335Z/NOPB be used in high-temperature applications?
Yes, it has a 200°C overrange capability, although continuous operation at high temperatures may affect its lifespan.
- How is the LM335Z/NOPB calibrated?
The device can be easily calibrated using a single-point calibration method with a pot connected across the sensor.
- What are some common applications for the LM335Z/NOPB?
Common applications include power supplies, battery management, HVAC systems, and appliances.
- Is the LM335Z/NOPB RoHS compliant?
Yes, the LM335Z/NOPB is RoHS compliant and suitable for lead-free processes.
