Datasheet

Electrical characteristics STM32F745xx STM32F746xx
150/227 DocID027590 Rev 4
General PCB design guidelines
Power supply decoupling should be performed as shown in Figure 43 or Figure 44,
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 43. Power supply and reference decoupling (V
REF+
not connected to V
DDA
)
1. V
REF+
input is available on all the packages except TFBGA100 whereas the V
REF–
is available only on
UFBGA176 and TFBGA216. When V
REF-
is not available, it is internally connected to V
DDA
and V
SSA
.
Figure 44. Power supply and reference decoupling (V
REF+
connected to V
DDA
)
1. V
REF+
input is available on all the packages except TFBGA100, whereas the V
REF–
is available only on
UFBGA176 and TFBGA216. When V
REF-
is not available, it is internally connected to V
DDA
and V
SSA
.
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