A good grounding scheme is crucial for the QCN-19D+. It's recommended to use a solid ground plane, and to connect the device's ground pins to the ground plane using vias. The input and output tracks should be kept as short as possible and shielded from other signals.
The QCN-19D+ requires a bias voltage of 5V and a bias current of 10mA. Ensure that the bias voltage is well-regulated and noise-free, and that the bias current is limited to prevent overheating.
The QCN-19D+ can handle up to 1W of input power. Exceeding this limit can cause damage to the device. It's recommended to use an attenuator or a limiter to prevent over-powering.
The QCN-19D+ has an input impedance of 50 ohms. To match the impedance, use a pi-network or a transmission line with a characteristic impedance of 50 ohms. You can also use a broadband transformer or a resistive matcher.
The QCN-19D+ operates over a temperature range of -40°C to +85°C. However, the device's performance may degrade at extreme temperatures. It's recommended to operate the device within a temperature range of 0°C to +60°C for optimal performance.
QCN-19D+ datasheet
by Mini-Circuits
