PCM2902E/2K - Texas Instruments

PCM2902E/2K Frequently Asked Questions (FAQs)

• What is the recommended clock source for the PCM2902E/2K?
  A high-quality, low-jitter clock source is recommended, such as a crystal oscillator or a clock generator IC. The clock source should be able to provide a stable clock signal with a frequency of 256x or 512x the desired audio sampling rate.
• How do I configure the PCM2902E/2K for master or slave mode?
  The PCM2902E/2K can be configured for master or slave mode by setting the M/S pin high or low, respectively. In master mode, the device generates the clock signal, while in slave mode, it receives the clock signal from an external source.
• What is the maximum cable length for the I2S interface?
  The maximum cable length for the I2S interface depends on the clock frequency and the signal quality. As a general rule, the cable length should be kept as short as possible, but a length of up to 10 inches (25 cm) is typically acceptable.
• How do I handle the digital audio data format conversion between different sampling rates?
  The PCM2902E/2K has a built-in asynchronous sample rate converter (ASRC) that can convert between different sampling rates. The ASRC can be enabled or disabled through the device's control registers.
• What is the power consumption of the PCM2902E/2K?
  The power consumption of the PCM2902E/2K depends on the operating mode and the clock frequency. In typical operating conditions, the device consumes around 100-150 mW of power.