Datasheet

Electrical characteristics STM32H743xI
162/226 DocID030538 Rev 3
General PCB design guidelines
Power supply decoupling should be performed as shown in Figure 40 or Figure 41,
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 40. Power supply and reference decoupling (V
REF+
not connected to V
DDA
)
1. V
REF+
input is available on all package whereas the V
REF–
s available only on UFBGA176+25 and
TFBGA240+25. When V
REF-
is not available, it is internally connected to V
DDA
and V
SSA
.
Figure 41. Power supply and reference decoupling (V
REF+
connected to V
DDA
)
1. V
REF+
input is available on all package whereas the V
REF–
s available only on UFBGA176+25 and
TFBGA240+25. When V
REF-
is not available, it is internally connected to V
DDA
and V
SSA
.
STM32
1 μF // 10 nF
1 μF // 10 nF
VREF+
(1)
VDDA
VSSA/VREF+
(1)
ai17535c
STM32
1 μF // 10 nF
ai17536d
VREF+/VDDA
VREF-/VSSA
(1)
(1)
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