PGA204AU datasheet by Texas Instruments

PGA204AU Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of PGA204AU?
  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 decouple the power pins with 10uF and 100nF capacitors.
• How do I optimize the gain and offset of PGA204AU for my specific application?
  Use the internal gain calibration feature to adjust the gain. For offset adjustment, use the offset calibration pins (OFFSET_P and OFFSET_N) to adjust the output voltage. You can also use external resistors to adjust the gain and offset.
• What is the recommended power-up sequence for PGA204AU?
  Power up the device in the following sequence: AVDD, DVDD, and then the analog input signal. This ensures that the internal biasing and reference circuits are properly initialized.
• How do I minimize noise and interference in my PGA204AU-based design?
  Use a low-noise power supply, decouple the power pins, and keep the analog and digital circuits separate. Use shielding and guard rings to minimize electromagnetic interference. Also, use a low-pass filter at the output to reduce high-frequency noise.
• What is the maximum input voltage that PGA204AU can handle?
  The maximum input voltage is ±10V, but it's recommended to keep the input voltage within ±5V to ensure optimal performance and prevent damage to the device.