Independent A/D Converter Supply And Reference Voltage; Figure 10. Power Supply Overview For Stm32F42Xxx And Stm32F43Xxx - STMicroelectronics STM32F405 Reference Manual

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Figure 10. Power supply overview for STM32F42xxx and STM32F43xxx

1. V and V must be connected to V
DDA SSA
5.1.1

Independent A/D converter supply and reference voltage

To improve conversion accuracy, the ADC has an independent power supply which can be
separately filtered and shielded from noise on the PCB.
•
The ADC voltage supply input is available on a separate V
•
An isolated supply ground connection is provided on pin V
To ensure a better accuracy of low voltage inputs, the user can connect a separate external
reference voltage ADC input on V
and V , respectively.
DD SS
. The voltage on V
REF
DocID018909 Rev 11
Power controller (PWR)
pin.
DDA
.
SSA
ranges from 1.8 V to V
REF
.
DDA
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