PCM1792DBR - Texas Instruments

PCM1792DBR Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the PCM1792DBR?
  The recommended power-up sequence is to apply VCC first, followed by VDD, and then the clock signal. This ensures that the internal voltage regulators are properly initialized.
• How do I optimize the PCB layout for the PCM1792DBR to minimize noise and jitter?
  To minimize noise and jitter, it's essential to keep the analog and digital grounds separate, use a solid ground plane, and keep the clock signal traces short and shielded. Additionally, place the decoupling capacitors close to the device pins and use a low-ESR capacitor for the VCC pin.
• What is the maximum clock frequency that can be used with the PCM1792DBR?
  The maximum clock frequency for the PCM1792DBR is 128 fs (384 fs for the PCM1792A), but it's recommended to use a clock frequency between 64 fs and 128 fs for optimal performance.
• How do I configure the PCM1792DBR for Master Clock Mode?
  To configure the PCM1792DBR for Master Clock Mode, set the MCLK pin to the desired clock frequency, and set the BCK pin to the bit clock frequency (typically 64 fs or 128 fs). Then, set the LRCK pin to the frame clock frequency (typically 48 kHz or 96 kHz).
• What is the recommended termination for the digital output pins (DOUT0-DOUT7)?
  The recommended termination for the digital output pins is a 50-ohm resistor in series with a 50-pF capacitor to ground. This helps to reduce reflections and improve signal integrity.