LMX9830SMX/NOPB datasheet by Texas Instruments

LMX9830SMX/NOPB Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the LMX9830?
  A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the analog and digital sections separate, and use a common ground point for the analog and digital grounds.
• How do I ensure the LMX9830's PLL loop filter is properly compensated?
  Use the recommended component values for the loop filter, and ensure the filter is properly tuned for the desired frequency range. You can use TI's PLL Loop Filter Calculator tool to help with the design.
• What is the maximum input power that the LMX9830 can handle?
  The maximum input power is 10 dBm. Exceeding this may cause damage to the device or affect its performance.
• Can I use the LMX9830 with a different voltage supply than the recommended 3.3V?
  While the LMX9830 can operate with a supply voltage between 2.7V and 3.6V, it's recommended to use the recommended 3.3V supply for optimal performance and to ensure compliance with the datasheet specifications.
• How do I troubleshoot issues with the LMX9830's PLL not locking?
  Check the PLL loop filter component values, ensure the VCO is within the recommended frequency range, and verify the reference clock signal is stable and within the recommended frequency range. Also, check for any noise or interference on the power supply lines.