PCM1748E datasheet by Texas Instruments

PCM1748E Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the PCM1748E?
  The recommended power-up sequence is to apply VCC first, followed by AVCC, and then DVCC. This ensures that the internal voltage regulators are powered up correctly.
• How do I configure the PCM1748E for master clock mode?
  To configure the PCM1748E for master clock mode, set the MCLK pin to the desired clock frequency, and set the MCLKDIV pin to the appropriate division ratio. Also, ensure that the BCK pin is tied to the MCLK pin.
• What is the maximum allowed jitter on the MCLK input?
  The maximum allowed jitter on the MCLK input is 500 ps peak-to-peak. Exceeding this limit may affect the performance of the PCM1748E.
• Can I use the PCM1748E with a 3.3V power supply?
  Yes, the PCM1748E can operate with a 3.3V power supply. However, the analog supply voltage (AVCC) should be 5V or 3.3V, and the digital supply voltage (DVCC) should be 3.3V or 1.8V.
• How do I optimize the PCB layout for the PCM1748E?
  To optimize the PCB layout for the PCM1748E, ensure that the analog and digital grounds are separated, and that the analog signals are routed away from the digital signals. Also, use a solid ground plane and decouple the power supplies properly.