PCM1789TPWRQ1 datasheet by Texas Instruments

PCM1789TPWRQ1 Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the PCM1789?
  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 optimize the analog performance of the PCM1789?
  To optimize analog performance, ensure that the analog power supply (AVCC) is decoupled from the digital power supply (DVCC) using separate power planes and decoupling capacitors. Also, use a low-noise, high-PSRR voltage regulator for AVCC.
• What is the maximum clock frequency supported by the PCM1789?
  The PCM1789 supports clock frequencies up to 256 fs (12.288 MHz) for 24-bit, 192 kHz audio.
• How do I configure the PCM1789 for Master Clock Mode?
  To configure the PCM1789 for Master Clock Mode, set the MCLK pin as an output by setting the MCLKOE bit in the Control Register. Then, set the desired clock frequency using the MCLKDIV register.
• What is the purpose of the VREF pin on the PCM1789?
  The VREF pin is an internal voltage reference output that can be used as a reference voltage for external analog-to-digital converters or other analog circuits.