AD9235BRUZ-20 - Analog Devices

AD9235BRUZ-20 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the AD9235BRUZ-20 to minimize noise and ensure optimal performance?
  A 4-layer PCB with a solid ground plane and a separate analog and digital power plane is recommended. Keep the analog and digital signals separate and avoid crossing them over each other. Use a common mode filter and a ferrite bead to filter the power supply.
• How do I optimize the clock input to the AD9235BRUZ-20 for best performance?
  Use a low-jitter clock source (<100 ps) and ensure the clock signal is properly terminated. Use a clock signal with a frequency that is an integer multiple of the sampling frequency to minimize jitter. Use a clock buffer or a clock distribution network to ensure a clean clock signal.
• What is the recommended power-up sequence for the AD9235BRUZ-20?
  Power up the analog power supply (AVDD) first, followed by the digital power supply (DVDD). Ensure that the analog power supply is stable before applying the clock signal. Power down the digital power supply before the analog power supply during shutdown.
• How do I handle the output data from the AD9235BRUZ-20?
  Use a FIFO or a buffer to handle the output data from the AD9235BRUZ-20. Ensure that the data is read from the FIFO or buffer at a rate that is at least twice the sampling frequency to prevent data loss. Use a data alignment circuit to ensure proper data alignment.
• What is the recommended method for calibrating the AD9235BRUZ-20?
  Use the internal calibration mode to calibrate the AD9235BRUZ-20. Apply a known input signal and use the calibration registers to adjust the gain and offset. Use an external calibration signal generator to provide a precise calibration signal.