A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the high-frequency traces short and away from the edges of the board. Use a common mode choke and a shielded cable for the USB interface.
Use a reliable USB stack and ensure that the host controller is configured to handle the QED223's USB 2.0 full-speed device. Implement proper error handling and retries for data transmission.
The maximum cable length supported by QED223 is 3 meters (10 feet) for a standard USB cable. However, this can be extended up to 5 meters (16.4 feet) using an active USB extension cable or a repeater.
Configure the QED223 to enter low-power mode by setting the SUSPEND pin low. This reduces the current consumption to around 10mA. You can also use the QED223's built-in power management features to optimize power consumption.
The recommended operating temperature range for QED223 is -40°C to 85°C (-40°F to 185°F). However, the device can operate up to 100°C (212°F) for short periods of time.
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QED223 Overview
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