RM0453 Rev 1 593/1461
RM0453 Digital-to-analog converter (DAC)
618
19 Digital-to-analog converter (DAC)
19.1 Introduction
The DAC module is a 12-bit, voltage output digital-to-analog converter. The DAC can be
configured in 8- or 12-bit mode and may be used in conjunction with the DMA controller. In
12-bit mode, the data could be left- or right-aligned. The DAC features one single channel.
An input reference pin, V
REF+
(shared with others analog peripherals) is available for better
resolution. An internal reference can also be set on the same input. Refer to voltage
reference buffer (VREFBUF) section.
The DACx_OUT1 pin can be used as general purpose input/output (GPIO) when the DAC
output is disconnected from output pad and connected to on chip peripheral. The DAC
output buffer can be optionally enabled to allow a high drive output current. An individual
calibration can be applied on each DAC output channel. The DAC output channels support
a low power mode, the Sample and hold mode.
19.2 DAC main features
The DAC main features are the following (see Figure 86: DAC block diagram)
• One DAC interface
• Left or right data alignment in 12-bit mode
• Synchronized update capability
• Noise-wave and Triangular-wave generation
• Single DAC channel
• DMA capability for each channel including DMA underrun error detection
• External triggers for conversion
• DAC output channel buffered/unbuffered modes
• Buffer offset calibration
• The DAC output can be disconnected from the DACx_OUT1 output pin
• DAC output connection to on chip peripherals
• Sample and hold mode for low power operation in Stop mode
• Input voltage reference,
V
REF+
Figure 86 shows the block diagram of a DAC channel and Table 112 gives the pin
description.
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