The recommended power-up sequence is to apply VCC first, followed by VDD, and then the digital inputs. This ensures that the internal voltage regulators are powered up correctly and that the digital circuitry is stable before the analog circuitry is enabled.
To optimize the PCB layout, keep the analog and digital grounds separate, use a solid ground plane, and keep the analog signal traces away from the digital signal traces. Also, use a low-ESR capacitor for the VCC and VDD pins, and place the decoupling capacitors close to the pins.
The maximum clock frequency that can be used with the PCM1791 is 256 fs (where fs is the sampling frequency). However, it's recommended to use a clock frequency that is 128 fs or less to ensure optimal performance and to minimize jitter.
To configure the PCM1791 for Master Clock mode, set the MCLK pin to the desired clock frequency, and set the BCK pin to the bit clock frequency (which is typically 64 fs). Also, set the WS pin to the word clock frequency (which is typically fs).
The recommended operating temperature range for the PCM1791 is -40°C to 85°C. However, the device can operate up to 105°C with reduced performance and reliability.
PCM1791ADBR datasheet
by Texas Instruments
