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STM32F427AI 数据表(PDF) 168 Page - STMicroelectronics

部件名 STM32F427AI
功能描述  32b Arm® Cortex®-M4 MCUFPU, 225DMIPS, up to 2MB Flash/2564KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 20 com. interfaces, camera & LCD-TFT
PDF  240 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STM32F427AI 数据表(HTML) 168 Page - STMicroelectronics

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Electrical characteristics
STM32F427xx STM32F429xx
168/240
DS9405 Rev 12
Figure 54. 12-bit buffered /non-buffered DAC
1. The DAC integrates an output buffer that can be used to reduce the output impedance and to drive external loads directly
without the use of an external operational amplifier. The buffer can be bypassed by configuring the BOFFx bit in the
DAC_CR register.
tWAKEUP(
4)
Wakeup time from off
state (Setting the ENx
bit in the DAC Control
register)
--
6.5
10
µs
CLOAD ≤ 50 pF, RLOAD ≥ 5 kΩ
input code between lowest and
highest possible ones.
PSRR+
(2)
Power supply rejection
ratio (to VDDA) (static
DC measurement)
-
-
–67
–40
dB No RLOAD, CLOAD = 50 pF
1. VDDA minimum value of 1.7 V is obtained with the use of an external power supply supervisor (refer to Section 3.17.2:
Internal reset OFF).
2. Specified by design.
3. The quiescent mode corresponds to a state where the DAC maintains a stable output level to ensure that no dynamic
consumption occurs.
4. Evaluated by characterization - not tested in production.
Table 86. DAC characteristics (continued)
Symbol
Parameter
Conditions
Min
Typ Max Unit
Comments
ai17157a
(1)
Buffer
12-bit
digital to
analog
converter
Buffered/non-buffered DAC
DACx_OUT
RLOAD
CLOAD



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