The recommended power-up sequence is to apply VCC first, followed by AVCC, and then the digital inputs. This ensures that the internal voltage regulators are powered up correctly.
To ensure accurate voltage output, it is essential to use a high-quality voltage reference, such as the Texas Instruments REF3020. Additionally, ensure that the output voltage is buffered with an op-amp, such as the OPA333, to prevent loading effects.
The maximum output current of the DAC7811 is 5mA. Exceeding this current may cause the output voltage to droop or the device to overheat.
To implement a voltage output range other than 0-2.5V, use an external amplifier, such as the OPA333, to scale the output voltage. For example, to achieve a 0-5V output range, use a gain of 2 in the amplifier.
The settling time of the DAC7811 is typically 10μs, but this can vary depending on the output voltage, load capacitance, and other factors. Ensure that the output voltage has settled before taking a measurement.
DAC7811IDGS datasheet
by Texas Instruments
