PCM9211PT - Texas Instruments

PCM9211PT Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the PCM9211PT?
  The recommended power-up sequence is to apply VCC first, followed by VDD, and then the analog power supplies (VAA and VDA). This ensures that the internal voltage regulators are powered up correctly.
• How do I configure the PCM9211PT for master clock mode?
  To configure the PCM9211PT for master clock mode, set the MCKI pin to the desired clock frequency, and set the MCKO pin to output the clock signal. Then, set the CLKCFG register to select the internal clock source and configure the clock divider as needed.
• What is the maximum input signal level for the analog-to-digital converters (ADCs)?
  The maximum input signal level for the ADCs is 2.5 Vpp differential, which corresponds to a maximum input voltage of 1.25 Vrms.
• How do I optimize the performance of the PCM9211PT in noisy environments?
  To optimize the performance of the PCM9211PT in noisy environments, use a low-pass filter on the analog input signals, and consider using a shielded cable or a twisted pair for the analog input connections. Additionally, ensure that the power supply is well-regulated and decoupled.
• What is the latency of the PCM9211PT's digital-to-analog converters (DACs)?
  The latency of the PCM9211PT's DACs is approximately 1.5 clock cycles, which corresponds to a latency of around 30 ns at a clock frequency of 48 kHz.