PCM78P datasheet by Texas Instruments

PCM78P Frequently Asked Questions (FAQs)

• What is the recommended power-on sequence for the PCM78P?
  The recommended power-on sequence is to apply VCC first, followed by VREF, and then the analog input signal. This ensures proper internal biasing and prevents damage to the device.
• How do I optimize the performance of the PCM78P in a noisy environment?
  To optimize performance in a noisy environment, use a low-pass filter at the input, keep the analog input signal away from the digital lines, and use a decoupling capacitor (e.g., 10uF) between VCC and GND. Additionally, consider using a shielded enclosure and minimizing the length of the analog input traces.
• What is the maximum allowed input voltage swing for the PCM78P?
  The maximum allowed input voltage swing is ±2.5V, which is the maximum differential input voltage that can be applied to the device without causing damage or affecting its performance.
• How do I ensure accurate conversion with the PCM78P?
  To ensure accurate conversion, use a high-quality, low-noise analog input signal, and ensure that the reference voltage (VREF) is stable and accurate. Additionally, use a proper layout and grounding technique to minimize noise and interference.
• What is the typical settling time for the PCM78P?
  The typical settling time for the PCM78P is around 10-15 microseconds, which is the time it takes for the output to settle to within 1 LSB of the final value after a change in the input signal.