Temperature Coefficient and PPM Explanation

Temperature Coefficient for a resistor characterizes how the observed resistance may change as a function of device temperature. Temperature coefficient can apply to other parts also like potentiometers, oscillators, crystals, RTD’s, and other components. If the component is a crystal instead of a resistor, then PPM will be referring to frequency instead of resistance.

Temperature coefficient is typically given in units of PPM (parts per million) per °C, which saves a lot of leading zeros as compared to using units of %/°C. Values may be positive or negative, indicating a direct or inverse correlation with temperature, respectively. It is a summary figure usually given in terms of a range or limiting maximum, and actual device behaviors will not necessarily vary linearly.

See also Resistors in eewiki Motley Electronic Topics

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