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STM32G474CB 데이터시트(PDF) 34 Page - STMicroelectronics

부품명 STM32G474CB
상세설명  Arm® Cortex®-M4 32-bit MCUFPU, 170 MHz / 213 DMIPS, 128 KB SRAM, rich analog, math acc, 184 ps 12 chan Hi-res timer
PDF  236 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32G474CB 데이터시트(HTML) 34 Page - STMicroelectronics

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Functional overview
STM32G474xB STM32G474xC STM32G474xE
34/236
DS12288 Rev 4
This digital interface supports the following features:
•
Up to two DAC output channels
•
8-bit or 12-bit output mode
•
Buffer offset calibration (factory and user trimming)
•
Left or right data alignment in 12-bit mode
•
Synchronized update capability
•
Noise-wave generation
•
Triangular-wave generation
•
Saw tooth wave generation
•
Dual DAC channel independent or simultaneous conversions
•
DMA capability for each channel
•
External triggers for conversion
•
Sample and hold low-power mode, with internal or external capacitor
•
Up to 1 Msps for external output and 15 Msps for internal output
The DAC channels are triggered through the timer update outputs that are also connected
to different DMA channels.
3.20
Voltage reference buffer (VREFBUF)
The STM32G474xB/xC/xE devices embed a voltage reference buffer which can be used as
voltage reference for ADC, DACs and also as voltage reference for external components
through the VREF+ pin.
The internal voltage reference buffer supports three voltages:
•
2.048 V
•
2.5 V
•
2.9 V
An external voltage reference can be provided through the VREF+ pin when the internal
voltage reference buffer is off.
The VREF+ pin is double-bonded with VDDA on some packages. In these packages the
internal voltage reference buffer is not available.
Figure 3. Voltage reference buffer
MSv40197V1
VREFBUF
Low frequency
cut-off capacitor
DAC, ADC
Bandgap
+
VDDA
-
100 nF
VREF+



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