JAJSRU9 October 2023 TMCS1133
ADVANCE INFORMATION
Sensitivity is the proportional change in the sensor output voltage due to a change in the input conductor current. This sensitivity is the slope of the first-order transfer function of the sensor (see Figure 7-1). The sensitivity of the TMCS1133 is tested and calibrated at the factory for high accuracy.
Deviation from ideal sensitivity is quantified by sensitivity error, defined in Equation 2 as the percent variation of the best-fit measured sensitivity from the ideal sensitivity.
where
Sensitivity thermal drift Sdrift,therm is the change in sensitivity with temperature and is reported in ppm/°C. To calculate sensitivity error at any given temperature, T, use Equation 3 to multiply the sensitivity thermal drift by the change in temperature from 25°C and add it to sensitivity error at 25°C.
where
Sensitivity lifetime drift Sdrift,life is the change in sensitivity due to operational and environmental stresses over the entire lifetime of the device, and is reported as a worst-case percentage change in sensitivity over lifetime at 25°C.