low TCR resistor vs standard chip resistor

Introduction

When designing precision circuits, selecting the right resistor type is critical. Two common choices are low TCR (Temperature Coefficient of Resistance) resistors and standard chip resistors. But what exactly sets them apart, and when should you use each type? This article compares their performance, stability, and ideal applications—helping engineers make informed decisions for high-accuracy designs.

What Is TCR in Resistors?

TCR (Temperature Coefficient of Resistance) measures how much a resistor's value changes with temperature. It’s expressed in ppm/°C (parts per million per degree Celsius). Lower TCR means better stability under thermal stress.

Low TCR vs Standard Chip Resistors: Key Differences

Performance Comparison: Data Table

Common Problem: Resistance Drift in Harsh Environments

Problem: Standard chip resistors exhibit significant resistance drift in high-temperature or variable environments (e.g., automotive, industrial), leading to circuit inaccuracies.

Solution: Low TCR resistors minimize drift with:

• Thin-film technology (stable metal alloys)

• Advanced trimming (laser-adjusted for consistency)

• Hermetic packaging (for humidity resistance)

Best Applications for Each Resistor Type

Conclusion

Choosing between low TCR resistors and standard chip resistors depends on your circuit’s precision needs. For critical applications (e.g., high-precision instrumentation or aerospace), low TCR’s stability justifies its cost. For general-purpose use, standard resistors offer a budget-friendly option. Always verify TCR specs in your operating temperature range.