Ultra High Precision Z-Foil Surface Mount Current Sensing Chip Resistors with TCR of ± 0.05 ppm/°C and Power Coefficient of 5 ppm at Rated Power Ultra High Precision Z-Foil Surface Mount Current Sensing Chip Resistors with TCR of 【 0.05 ppm/∑C and Power Coefficient of 5 ppm at Rated Power