The recommended power-up sequence is to apply VCC first, followed by AVCC, and then the digital inputs. This ensures proper device operation and prevents latch-up.
To ensure accurate voltage output, it's essential to use a high-precision voltage reference, such as the Texas Instruments REF5025. 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 DAC7731E/1K is 5 mA. Exceeding this current limit may cause damage to the device or affect its accuracy.
To handle the output glitch, use a simple RC filter (e.g., 1 kΩ and 10 nF) at the output of the DAC to filter out the glitch. Alternatively, use a voltage-controlled amplifier or an op-amp to buffer the output and reduce the glitch amplitude.
To minimize noise and ensure accurate operation, keep the analog and digital grounds separate, use a solid ground plane, and route the analog signals away from the digital signals. Additionally, use a low-ESR capacitor (e.g., 10 μF) to decouple the AVCC pin.
DAC7731E/1K datasheet
by Texas Instruments
