Why is it necessary to have a very low TCR temperature drift for thin film precision resistors?

Thin film precision resistors require very low TCR (temperature coefficient) temperature drift, mainly based on the following considerations:

1、 Improve the stability of resistance value
TCR is an indicator that measures the change in resistance value with temperature. For thin film precision resistors, their resistance values need to maintain a high degree of stability to ensure accurate resistance values under various temperature conditions. A very low TCR means that the resistance value changes very little at different temperatures, thereby improving the stability of the resistance value.

2、 Ensure consistency in circuit performance
Thin film precision resistors are commonly used in applications that require extremely high circuit performance, such as medical equipment, measuring instruments, automotive electronics, etc. In these applications, consistency in circuit performance is crucial. A very low TCR can ensure that the resistance value remains consistent under different temperature conditions, thereby avoiding circuit performance fluctuations caused by temperature changes.

3、 Expand the scope of application
The very low TCR enables thin film precision resistors to adapt to a wider range of application environments. For example, in high or low temperature environments, the resistance value of ordinary resistors may undergo significant changes, while thin film precision resistors with very low TCR can maintain stable resistance values, making them more suitable for use under these extreme conditions.

4、 Meet high-precision requirements
For applications that require high-precision resistance values, such as precision measurement and control systems, a very low TCR is essential. Because these applications require extremely high precision in resistance values, any small changes can lead to measurement errors or inaccuracies in the control system. Thin film precision resistors with very low TCR can provide higher accuracy and reliability, meeting the needs of these applications.

5、 Enhance the competitiveness of the product
In the market, thin film precision resistors with very low TCR often have higher competitiveness. Because they can provide higher performance and stability, meet a wider range of application needs, and thus win the trust and favor of customers.

In summary, thin film precision resistors require very low TCR temperature drift mainly to improve the stability of resistance values, ensure consistency in circuit performance, broaden application scope, meet high-precision requirements, and enhance product competitiveness. These measures help improve the performance and reliability of thin film precision resistors, meeting the needs of various application scenarios.