Datasheet

Electrical characteristics STM32F446xC/E
146/202 DocID027107 Rev 6
General PCB design guidelines
Power supply decoupling should be performed as shown in Figure 47 or Figure 48,
depending on whether V
REF+
is connected to V
DDA
or not. The 10 nF capacitors should be
ceramic (good quality). They should be placed them as close as possible to the chip.
Figure 47. Power supply and reference decoupling (V
REF+
not connected to V
DDA
)
1. V
REF+
and V
REF–
inputs are both available on UFBGA144. V
REF+
is also available on LQFP100, LQFP144,
and WLCSP81. When V
REF+
and V
REF–
are not available, they are internally connected to V
DDA
and V
SSA
.
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