Depending on the application, there can be a significant amount of high frequency noise on the power supply line. If high frequency noise (>100kHz) is present, the user can switch to a 1μF bypass capacitor to provide additional filtering on the power supply line. Increasing the bypass capacitance or choosing a capacitor with a lower ESR across frequency improves PSRR performance.

An additional power supply consideration is line regulation. For the ISOTMP35, line regulation refers to the change in output temperature with changing power supply. Figure 5-6 shows that, across the entire environment temperature range, ISOTMP35 maintains a steady amount change in temperature across V_DD.