Information

Electrical characteristics STM32F105xx, STM32F107xx
78/104 DocID15274 Rev 7
General PCB design guidelines
Power supply decoupling should be performed as shown in Figure 36 or Figure 37,
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 36. Power supply and reference decoupling (V
REF+
not connected to V
DDA
)
1. V
REF+
and V
REF–
inputs are available only on 100-pin packages.
Figure 37. Power supply and reference decoupling (V
REF+
connected to V
DDA
)
1. V
REF+
and V
REF–
inputs are available only on 100-pin packages.
V
REF+
STM32F10xxx
V
DDA
V
SSA
/V
REF-
1 µF // 10 nF
1 µF // 10 nF
ai14380
c
(See note 1)
(See note 1)
V
REF+
/V
DDA
STM32F10xxx
1 µF // 10 nF
V
REF–
/V
SSA
ai14381
c
(See note 1)
(See note 1)