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 or incorrect output voltages.
The output voltage settling time is dependent on the output capacitance and the desired settling accuracy. As a general guideline, allow at least 10-20 μs for the output voltage to settle within 1 LSB of the final value.
The maximum output current capability of the DAC8734SRHAR is 10 mA per channel. Exceeding this limit may cause output voltage droop or damage to the device.
To ensure accurate output voltage levels with a high-impedance load, use an output buffer amplifier with a high input impedance and low output impedance. This will help maintain the desired output voltage levels and prevent loading effects.
To minimize noise and ensure accurate operation, follow a star-grounding layout, keep analog and digital signals separate, and use a solid ground plane. Also, place decoupling capacitors close to the device and use a low-ESR capacitor for the AVCC pin.
DAC8734SRHAR datasheet
by Texas Instruments
