The recommended power-up sequence is to apply VCC first, followed by AVCC, and then the digital supply (DVCC). This ensures that the internal analog and digital circuits are properly initialized.
The DAC7728 has a rail-to-rail output stage, but it's recommended to use an external op-amp to buffer the output and ensure a stable voltage range. Additionally, the output voltage range can be adjusted using the internal gain settings or external resistors.
The maximum update rate of the DAC7728 is 1 MSPS (million samples per second), but this can be limited by the interface clock frequency, the settling time of the output, and the system's overall noise performance.
To minimize noise and distortion, use a low-noise power supply, decouple the power pins with capacitors, use a high-quality clock source, and ensure proper PCB layout and grounding. Additionally, consider using a low-pass filter or a reconstruction filter to remove high-frequency noise.
Yes, the DAC7728 is designed for multi-channel applications. It has a built-in channel sequencer that allows for easy configuration and control of multiple channels. However, the specific implementation details will depend on the application requirements and the system's overall architecture.
DAC7728SRTQT datasheet
by Texas Instruments
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