52.3 External Analog Reference Connections

The following schematic checklist is only necessary if the application is using one or more of the external analog references. If the internal references are used instead, the circuits in the following two figures are not necessary.

Figure 52-3. External Analog Reference Schematic With Two References
Figure 52-4. External Analog Reference Schematic With One Reference
Table 52-2. External Analog Reference Connections
Signal NameDescriptionRecommended Pin Connection
VREFxExternal reference VREFA/VREFB

Capacitors(2): refer to REG_9(1)

AVSSGround-
Note:
  1. Refer to Power Supply Electrical Specifications from the “Electrical Characteristics” chapter.
  2. Decoupling capacitors must be placed close to the device, and low ESR capacitors must be used for better decoupling.