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STM32L552CC Datasheet(PDF) 63 Page - STMicroelectronics

Part # STM32L552CC
Description  Ultra-low-power Arm® Cortex®-M33 32-bit MCUTrustZone®FPU, 165 DMIPS, up to 512 KB Flash memory, 256 KB SRAM, SMPS
PDF  340 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32L552CC Datasheet(HTML) 63 Page - STMicroelectronics

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DS12737 Rev 6
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STM32L552xx
Functional overview
78
3.22
Digital to analog converter (DAC)
Two 12-bit buffered DAC channels can be used to convert digital signals into analog voltage
signal outputs. The chosen design structure is composed of integrated resistor strings and
an amplifier in inverting configuration.
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
•
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
The DAC channels are triggered through the timer update outputs that are also connected
to different DMA channels.
3.23
Voltage reference buffer (VREFBUF)
The 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 two voltages:
•
2.048 V
•
2.5 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 9. Voltage reference buffer
MSv40197V1
VREFBUF
Low frequency
cut-off capacitor
DAC, ADC
Bandgap
+
VDDA
-
100 nF
VREF+



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