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Power control (PWR) RM0038 Figure 8. Power supply overview IURP9XSWR9''$95() PXVWEHWLHGWR966$95() 9''9''$ 966966$ 9''$GRPDLQ $'& '$& &203 7HPSVHQVRU 5HVHWEORFN 3// 9''GRPDLQ ,2VXSSO\ 966 9'' 6WDQGE\ FLUFXLWU\ ZDNHXSORJLF ,:'*57& /6(FU\VWDO .RVFLOODWRU 5&&&65 9&25(GRPDLQ &RUHPHPRULHV GLJLWDO SHULSKHUDOV 9ROWDJH UHJXODWRU G\QDPLF YROWDJHVFDOLQJ 9/&' /&' DLH 1. VDDA and VSSA must be connected to VDD and VSS, respectively. 2. When available (depending on packages), VREF- must be tied to VSSA. 3. Depending on the operating power supply range used, some peripherals may be used with limited functionalities or performance. For more details, please refer to section "General operating conditions" in STM32L1xxxx datasheets. 5.1.1 Independent A/D and DAC converter supply and reference voltage To improve conversion accuracy, the ADC and the DAC have an independent power supply that can be filtered separately, and shielded from noise on the PCB. 98/901 • The ADC voltage supply input is available on a separate VDDA pin • An isolated supply ground connection is provided on the VSSA pin DocID15965 Rev 13
