Despite the importance of this specification, individual resistor manufacturers use different methods for defining TCR on their published datasheets. In most cases, this definition does not provide enough information to enable an end user to accurately predict the influence of temperature changes on the resistance value. Where such published TCR variances are of concern, of course, is in their potential to create measurement uncertainty. Particularly, in applications where high-precision resistor performance and temperature stability are absolute requirements. This uncertainty is created when there is insufficient confidence that a TCR specification has been calculated with enough data to allow for the accurate prediction of the true impact of temperature change on resistor performance.
Microhm Electronics are dedicated in the design, development and manufacture of reliable high-precision metal foil resistors and power current sensors for a diverse array of applications. Hundreds of standard model configurations are derived from one of the industry’s most extensive portfolios of customer-selectable housings, materials, substrates, and metal foil grade combinations. Advanced manufacturing techniques ensure that resistor designs are performance-optimized for consistent operation to published specifications throughout their useful service life. All VPG high-precision Bulk Metal Foil resistors feature some of the industry’s most favorable TCR specifications, uniformly calculated per stringent industry best practices. This ensures their reliability across all resistance and operating temperature ranges.
