Resistance temperature detectors (RTDs) are widely used for precise temperature measurement in industrial settings. They work by measuring resistance, which varies linearly with temperature. However, achieving the required accuracy and robustness in an industrial environment poses design challenges. The NAFE13388/NAFE73388 family simplifies RTD measurement by offering an integrated solution with built-in protections that ensure accuracy, unaffected by external components’ leakage or temperature drift. A high-precision, low-drift current source provides flexibility in system design.
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Overview
Resistance temperature detectors (RTDs) are essential for precise temperature measurement in industrial environments, as their resistance changes linearly with temperature. However, designing an accurate, stable, and robust measurement system presents challenges due to the harsh conditions in industrial settings.
The NAFE13388/NAFE73388 family addresses these challenges by offering a fully integrated RTD measurement solution. Its integrated protection ensures that accuracy remains stable, unaffected by external components' leakage or temperature variations. Additionally, the high-precision, low-drift current excitation source provides flexibility in adapting to various system requirements.
In the common 3-wire RTD configuration, a single current injection path simplifies system design compared to solutions using two matched current sources. This streamlined approach enhances efficiency without compromising accuracy. Extensive lab testing, covering temperatures from -40°C to 800°C, demonstrates the system's reliability, considering cable resistance effects and using both factory and user calibrations for different accuracy needs.
Key Takeaways
- Discover a highly accurate and robust 3-wire RTD measurement system
- Learn how to reduce wire resistance errors with an automatic measurement step
- Skip the calibration process by using NXP factory calibrated parts
