The recommended power-up sequence is to apply the analog power supply (VDDA) first, followed by the digital power supply (VDDD). This ensures that the analog circuitry is powered up before the digital circuitry.
To optimize jitter rejection, ensure that the clock input (MCLK) is a high-quality, low-jitter clock source. Additionally, use a high-quality crystal oscillator or a low-jitter clock generator, and ensure that the clock signal is properly terminated and routed.
To minimize noise and ensure optimal performance, keep the analog and digital power supply traces separate, use a solid ground plane, and keep the clock signal traces away from the analog signal traces. Also, use a low-impedance power supply and decouple the power supply pins with high-quality capacitors.
To configure the WM8741 for master clock mode, set the MCLK pin as the clock source, and ensure that the MCLK frequency is within the specified range (typically 256x or 512x the sample rate). Also, set the BCK pin to the desired clock frequency, and configure the WS pin to select the desired clock mode.
The recommended method for filtering the output of the WM8741 is to use a low-pass filter with a cutoff frequency above the audio bandwidth (typically 20 kHz). A simple RC filter or a more complex active filter can be used, depending on the specific application requirements.
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