The recommended power-up sequence is to apply VDD first, followed by VREF, and then the digital inputs. This ensures that the internal circuitry is properly biased before the digital inputs are applied.
To ensure accurate voltage output, it is essential to decouple the VREF pin with a capacitor (e.g., 10nF) to reduce noise and ensure a stable reference voltage. Additionally, use a low-noise power supply and minimize noise on the digital inputs.
The maximum output current of the DAC8811 is 5mA. Exceeding this current may cause the output voltage to droop or the device to overheat.
During power-down or reset, the DAC8811's output is high-impedance, which means it is in a high-impedance state. To prevent unwanted voltage levels, it is recommended to add a pull-down resistor (e.g., 1kΩ) to the output pin to ensure a defined voltage level.
To minimize noise and ensure accurate performance, it is recommended to keep the analog and digital signal paths separate, use a solid ground plane, and keep the power supply and reference voltage traces short and wide.
DAC8811IBDGKR datasheet
by Texas Instruments
