Maxim provides a recommended PCB layout in the datasheet, but it's also important to follow general high-speed PCB design guidelines, such as using a solid ground plane, minimizing trace lengths, and using 50Ω impedance-controlled traces for the differential pairs.
The DS21Q50LN has a thermal pad on the bottom of the package, which should be connected to a solid ground plane on the PCB to dissipate heat. Additionally, ensure good airflow around the device and consider using a heat sink if the device will be operating at high temperatures or high currents.
The DS21Q50LN requires a 100Ω differential termination at the input, which can be achieved using a 50Ω resistor to ground on each input pin. This termination is necessary to maintain signal integrity and minimize reflections.
While the DS21Q50LN is specified for a 3.3V supply, it can operate with a supply voltage range of 2.7V to 3.6V. However, the device's performance and power consumption may vary outside of the recommended operating range. Consult the datasheet for specific details on supply voltage tolerance.
The DS21Q50LN requires a bias voltage on the VREF pin, which should be set to a voltage between 1.2V and 1.8V. The bias voltage should be generated using a low-noise, low-impedance source, such as a voltage reference or a resistive divider from the supply voltage.
DS21Q50LN datasheet
by Maxim Integrated Products
