The separation between the input conductor and the Hall sensor die due to the TMCS1100 construction provides inherent galvanic isolation between package pins 1-4 and pins 5-8. Insulation capability is defined according to certification agency definitions and using industry-standard test methods as defined in the Section 7.6 table. Assessment of device lifetime working voltages follow the VDE 0884-11 standard for basic insulation, requiring time-dependent dielectric breakdown (TDDB) data-projection failure rates of less than 1000 part per million (ppm), and a minimum insulation lifetime of 20 years. The VDE standard also requires an additional safety margin of 20% for working voltage, and a 30% margin for insulation lifetime, translating into a minimum required lifetime of 26 years at 509 V_RMS for the TMCS1100.

Figure 9-1 shows the intrinsic capability of the isolation barrier to withstand high-voltage stress over the lifetime of the device. Based on the TDDB data, the intrinsic capability of these devices is 424 V_RMS with a lifetime of
> 100 years. Other factors such as operating environment and pollution degree can further limit the working voltage of the component in an end system.

Figure 9-1 Insulation Lifetime