The isolated ADC can be used for a variety of purposes, as shown in Figure 3-27. Already mentioned are the OCP/SCP protection and ASC configurations. In addition to this, the temperature of the power modules can also be monitored by configuring specified AIx channels to bias external temperature sensors. This is described in the following section. Other potential uses for the ADC to enable a high level of system failure mode coverage would be DC link voltage monitoring through a resistor divider, and other DC levels. The 10-bit ADC has a full scale voltage range of 0V to 3.6V and has a total error of 1.5%. The reference voltage can be chosen as external or internal depending on accuracy requirements. The internal voltage reference has a 5% tolerance. The ADC conversions are aligned with the INP signal to ensure minimal noise coupling from the switching transients. All data is stored in the ADC data registered which can be read via SPI. There are three sampling modes available to ensure the least amount of switching noise in the measurement: Center aligned, Edge, and Hybrid modes.

Figure 3-27 ADC implementation example