58.3 External Analog Reference Connections

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

Figure 58-4. External Analog Reference Schematic With Three References
Figure 58-5. External Analog Reference Schematic With Two References
Figure 58-6. External Analog Reference Schematic With One Reference
Table 58-2. External Analog Reference Connections
Signal NameDescriptionRecommended Pin Connection
VREFxExternal reference VREFA/VREFB/VREFCCapacitors(2): refer to REG_9(1)
AVSSGround-
Note:
  1. Refer to the “Power Supply Electrical Specifications” from the Electrical Characteristics chapter.
  2. Decoupling capacitors must be placed close to the device, low ESR capacitors must be used for better decoupling.