GVA-123+ - Mini-Circuits

GVA-123+ Frequently Asked Questions (FAQs)

• What is the recommended PCB layout and grounding scheme for optimal performance?
  A good grounding scheme is crucial for the GVA-123+. Use a solid ground plane, and connect the amplifier's ground pins to it. Keep the input and output traces short and away from each other to minimize coupling. Use a 50-ohm microstrip line for the input and output traces.
• How do I choose the correct bias voltage and current for my application?
  The recommended bias voltage is 12V, but you can operate the GVA-123+ from 9V to 15V. The bias current is typically 120mA. Adjust the bias voltage and current based on your specific application's requirements, but ensure the amplifier stays within its recommended operating conditions.
• What is the maximum input power the GVA-123+ can handle without damage?
  The GVA-123+ can handle up to +10 dBm (10mW) of input power without damage. Exceeding this limit may cause permanent damage to the amplifier.
• How do I ensure the amplifier is stable and doesn't oscillate?
  To ensure stability, use a 10nF to 100nF capacitor between the output and ground to prevent oscillations. Additionally, use a 10-ohm resistor in series with the output to improve stability. Follow the recommended PCB layout and grounding scheme to minimize parasitic inductances and capacitances.
• What is the typical noise figure of the GVA-123+?
  The typical noise figure of the GVA-123+ is around 3.5 dB. This value may vary depending on the specific application, operating frequency, and temperature.