STM32F103xx
Electrical characteristics
General PCB design guidelines
Power supply decoupling should be performed as shown in Figure 25 or Figure 26,
depending on whether V is connected to V or not. The 10 nF capacitors should be
REF+
DDA
ceramic (good quality). They should be placed them as close as possible to the chip.
Figure 25. Power supply and reference decoupling (V
not connected to V
)
DDA
REF+
STM32F103xx
VREF+
(see note 1)
1 µF // 10 nF
VDDA
1 µF // 10 nF
VSSA /VREF+
(see note 1)
ai14388
1. VREF+ and VREF– inputs are available only on 100-pin packages.
Figure 26. Power supply and reference decoupling (V
connected to V
)
REF+
DDA
STM32F103xx
VREF+/VDDA
(See note 1)
1 µF // 10 nF
VREF–/VSSA
(See note 1)
ai14389
1. VREF+ and VREF– inputs are available only on 100-pin packages.
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