ERA-3+ - Mini-Circuits

ERA-3+ Frequently Asked Questions (FAQs)

• What is the recommended PCB layout and grounding scheme for optimal performance?
  Mini-Circuits recommends a 4-layer PCB with a solid ground plane, and a via-stitched ground plane around the amplifier. The input and output traces should be kept short and away from other signals. A decoupling capacitor (e.g., 100nF) should be placed close to the amplifier's power pins.
• How do I choose the correct biasing resistors for my application?
  The biasing resistors (R1 and R2) should be chosen based on the desired output current and voltage. A good starting point is to use the values recommended in the datasheet (R1=1kΩ, R2=2kΩ). Adjust these values to achieve the desired output current and voltage, while ensuring the amplifier remains within its recommended operating conditions.
• What is the maximum input power that the ERA-3+ can handle?
  The ERA-3+ can handle input powers up to +10dBm (10mW) without damage. However, the recommended maximum input power is +5dBm (3.2mW) to ensure optimal performance and linearity.
• How does the ERA-3+ behave when the input signal is over-driven?
  When the input signal is over-driven, the ERA-3+ will compress and eventually saturate, causing distortion and reduced gain. To avoid this, ensure the input signal is within the recommended range (-20dBm to +5dBm) and use an attenuator or limiter if necessary.
• Can I use the ERA-3+ in a push-pull or differential configuration?
  Yes, the ERA-3+ can be used in a push-pull or differential configuration to improve performance and reduce even-order distortion. However, this requires careful design and layout to ensure proper balancing and matching of the amplifiers.