PCM2902E datasheet by Texas Instruments

PCM2902E Frequently Asked Questions (FAQs)

• What is the recommended power-on sequence for the PCM2902E?
  The recommended power-on sequence is to apply VCC first, followed by VREF, and then the analog and digital inputs. This ensures proper device operation and prevents latch-up.
• How do I optimize the analog input filter for the PCM2902E?
  The analog input filter should be designed to reject noise and aliasing. A 3rd-order Butterworth filter with a cutoff frequency of 10 kHz to 20 kHz is recommended. The filter should also be designed to match the impedance of the analog input.
• What is the recommended clock frequency for the PCM2902E?
  The recommended clock frequency is 256 fs (where fs is the sampling frequency). This ensures proper device operation and minimizes jitter.
• How do I handle the digital output data from the PCM2902E?
  The digital output data is in 2's complement format. The MSB (most significant bit) is the sign bit, and the remaining bits represent the magnitude. The data should be processed accordingly to ensure correct audio playback.
• What is the maximum input signal amplitude for the PCM2902E?
  The maximum input signal amplitude is 2.5 Vrms. Exceeding this amplitude may result in distortion and clipping.