5.8.3.1 Comparator Mode

Comparator mode is selected using bit 0 of CONFIG. In this mode, the Alert output is asserted as active-high or active-low, using bit 1 of CONFIG. Figure 5-10 shows the conditions that toggle the Alert output.

If the device enters Shutdown mode with asserted Alert output, the output remains asserted during Shutdown mode. The device must be operating in Continuous Conversion mode for t_CONV. The TA vs. T_UPPER, T_LOWER and T_CRIT boundary conditions need to be satisfied in order for the Alert output to deassert.

Comparator mode is useful for thermostat type applications, such as turning on a cooling fan or triggering a system shutdown when the temperature exceeds a safe operating range.