PGA205AU/1K datasheet by Texas Instruments

PGA205AU/1K Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance?
  A 4-layer PCB with a solid ground plane and a separate analog ground plane is recommended. Keep the analog and digital grounds separate and connect them at a single point. Use a star topology for the power supply and keep the signal traces short and direct.
• How do I optimize the gain and offset of the PGA205AU?
  Use the internal gain calibration feature to optimize the gain. For offset optimization, use the internal offset calibration feature or add an external offset adjustment circuit. Refer to the application note SLAA642 for more details.
• What is the recommended power-up sequence for the PGA205AU?
  Power up the device in the following sequence: VCC, AVCC, and then DVCC. Ensure that the power supplies are stable and within the recommended operating range before applying the input signal.
• How do I minimize noise and interference in my PGA205AU-based design?
  Use a low-noise power supply, decouple the power supplies with capacitors, and use a shielded enclosure. Keep the analog and digital circuits separate and use a ground plane to reduce electromagnetic interference (EMI).
• What is the maximum input signal amplitude that the PGA205AU can handle?
  The maximum input signal amplitude is ±10V, but it's recommended to keep the input signal amplitude below ±5V to ensure optimal performance and prevent damage to the device.