Transcription of Temperature Coefficient of Resistance for Current Sensing
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Temperature Coefficient of Resistance for Current Sensing
V I S H AY D A L E. Resistors White Paper Temperature Coefficient of Resistance for Current Sensing By Bryan Yarborough HOW Temperature AND CONSTRUCTION AFFECT Resistance STABILITY. OBJECTIVE represent ppm/ C that may be easier to consider is that 1. What is TCR? 3900 ppm/ C is the same as %/ C. These may seem like small numbers until you consider the change in 2. How is TCR determined? Resistance due to a Temperature rise of 100 C. For copper 3. How does construction affect TCR performance? that would cause a 39 % change in Resistance . 4. TCR in applications An alternate method for visualizing the effect of TCR is to consider it in terms of the rate of expansion of a material with 5.
total resistance is influenced by the combination of the copper terminal and the low TCR resistance alloy. For the lowest resistance values of a specific resistor construction, the copper becomes more significant in the TCR rating and performance. This influence may occur at different resistance value ranges for different parts.
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