The recommended power-up sequence is to apply VCC first, followed by AVCC, and then the digital supply (DVCC). This ensures that the analog and digital sections of the device are powered up correctly.
To ensure accurate voltage output, it is essential to use a stable reference voltage, minimize noise on the analog input pins, and ensure that the output voltage is within the specified range of 0 to VREF.
The internal 2.5V reference voltage is used as a default reference voltage for the DAC, but it can be overridden by an external reference voltage if desired. The internal reference voltage is enabled by default, but it can be disabled by tying the REFEN pin to GND.
The DAC8501E/250 can be interfaced with a microcontroller using a standard SPI interface. The microcontroller should be configured as a SPI master, and the DAC8501E/250 should be configured as a SPI slave. The microcontroller should send the desired DAC code to the DAC8501E/250 using the SPI interface.
The settling time of the DAC8501E/250 is typically around 10 μs, but it can vary depending on the output voltage, load capacitance, and other factors. It is essential to ensure that the DAC output has settled before taking a measurement or using the output voltage.
DAC8501E/250 datasheet
by Texas Instruments
