The recommended power-up sequence is to apply VCC first, followed by VREF, and then the digital inputs. This ensures that the internal circuitry is properly biased and configured before the digital inputs are applied.
To ensure accurate voltage output, it is essential to use a stable and low-noise voltage reference (VREF) and to decouple the power supply lines with adequate capacitors. Additionally, the output voltage should be buffered with an op-amp if it needs to drive a load.
The maximum output current of the DAC8571 is 5 mA. Exceeding this current limit may cause the output voltage to droop or the device to overheat.
During power-down or reset, the DAC8571's output is high-impedance, which means it is in a high-impedance state and does not drive the output pin. To avoid any unwanted voltage on the output pin, it is recommended to add a pull-down or pull-up resistor to the output pin to ensure a defined voltage level.
The internal 2.5V reference voltage is used as a default reference voltage for the DAC. It can be used as a reference voltage for the DAC, eliminating the need for an external reference voltage. However, an external reference voltage can be used if a different reference voltage is required.
DAC8571IDGKG4 datasheet
by Texas Instruments
