43 Analog Peripherals Considerations

This chapter provides a global view of the analog system, which is composed of the following analog peripherals: AC, ADC, DAC, OPAMP. The analog peripherals can be connected to each other as illustrated in the following block diagram.

CAUTION:
  • Only one analog output function can be used on the same pin.
  • When DAC0 or DAC1 channel is enabled (DACCTRLx.ENABLE = 1), respective VOUT0 (PA02) or VOUT1 (PA07) pins cannot be used for other purposes (excluding analog inputs).
  • Some OPAMP Outputs (OAxOUT) can be connected to a specific Analog Comparator or ADC Inputs (AINx) if they share the same pad, for example, OA0OUT can be connected to the Analog Comparator AIN3 or the ADC AIN5 input (the PA07 pin).
  • The OA1OUT pin is only available on 64-pin and 100-pin packages, but can still be used on lower pin count packages as an internal input signal
Figure 43-1. Analog Signal Components Interconnections