STM32F4 Target > Block References > On-chip Peripherals > DAC

User Interface

How this block appears in a Simulink model?

stm32f4_regulardac_block

What can be configured?

When to use this block?

Use the Digital to Analog Convertor (DAC) Block to generate analog signals. For all STM32F4xx, a maximum of 2 analog channels can be generated simultaneously.

1.	Channel 1 = Pin A4

2.	Channel 2 = Pin A5

The DAC module of STM32F4xx has the following specifications.

2 x 12-bits 1MHz Sample per second DAC converters: one for each output channel

Better resolution can be controlled with input voltage reference VREF

How does this block work?

The DAC block takes inputs as either voltage (between - 3.3V) or raw data (between 0 - 4095) and generated output analog signals according to the following equation.

Analog output voltage = VREF x DOR / 4095

where DOR is the required DAC register value.

For voltage input, DOR is computer as follow:

DOR = (INPUT_VOLTS x 4095) / VREF

For raw data (both 8 and 12 bits) input, DOR is computer as follow:

DOR = INPUT_RAW

The DAC Module is based on software simultaneous trigger configuration.

Demos

Regular DAC