Texas Instruments recommends following the layout and routing guidelines in the application note SLVAE03, which provides detailed information on minimizing EMI and noise in high-speed interfaces. Additionally, it's essential to keep the signal traces short, use a solid ground plane, and avoid crossing signal lines over each other.
Proper termination is crucial for signal integrity. The AM26LV31CNS requires a 50-ohm termination resistor at the receiver end, and the transmitter should be AC-coupled with a 100-nF capacitor. It's also recommended to use a series resistor (Rs) of 22-33 ohms at the transmitter output to reduce reflections and improve signal quality.
The maximum cable length supported by the AM26LV31CNS depends on the cable type, signal frequency, and desired signal quality. As a general guideline, Texas Instruments recommends keeping the cable length below 10 meters for optimal signal quality. However, with proper termination and signal conditioning, cable lengths up to 20 meters can be achieved, but signal attenuation and distortion may occur.
The AM26LV31CNS has built-in fault detection and hot-swapping capabilities. The device features an FAULT pin that indicates a fault condition, such as an overcurrent or undervoltage event. To handle hot swapping, it's recommended to use an external power switch, such as the TPS2115A, to control the power supply to the device. This ensures a safe and controlled power-up sequence during hot-swapping events.
The AM26LV31CNS has a maximum junction temperature (TJ) of 150°C. To ensure reliable operation in high-temperature environments, it's essential to provide adequate heat sinking and thermal management. This can be achieved by using a heat sink, thermal interface material, and ensuring good airflow around the device. Additionally, reducing the power consumption and operating frequency can also help minimize thermal issues.
AM26LV31CNS datasheet
by Texas Instruments
