AN 522: Implementing Bus LVDS Interface in Supported Intel® FPGA Device Families

ID 683803
Date 7/31/2018

Driver Slew Rate

A fast slew rate helps to improve the rise time, especially at the receiver furthest from the driver. However, a faster slew rate also magnifies ringing due to reflection.
Figure 22. Effect of Driver Edge Rate (Driver in U1, Receiver in U2 and U10)This figure shows the driver slew rate effect. A comparison is made between the slow and fast slew rate with a 12 mA drive strength. The driver is at U1 and the differential waveforms at U2 and U10 are examined.