Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the input and output traces as short as possible. Additionally, it's recommended to use a common-mode choke and a ferrite bead to filter out high-frequency noise.
The TIL119 requires a bias voltage of 3.3V or 5V, and it's essential to ensure the bias voltage is stable and noise-free. Use a low-dropout regulator (LDO) or a voltage reference to provide a clean bias voltage, and decouple the bias pin with a 10nF capacitor.
Although the datasheet specifies an absolute maximum input voltage of 6V, it's recommended to limit the input voltage to 5.5V to ensure reliable operation and prevent damage to the device.
The TIL119's output voltage swing is specified as 0.5V to 4.5V, which means the output voltage can swing up to 4.5V above the bias voltage. This implies that the output stage is not rail-to-rail, and the output voltage may not reach the full supply voltage. Ensure your design takes this into account when selecting the output load and termination.
Texas Instruments recommends a 50Ω termination resistor to match the output impedance of the TIL119. This ensures maximum signal integrity and minimizes reflections. Additionally, consider adding a 10nF capacitor in parallel with the termination resistor to filter out high-frequency noise.
