Abstract

Sub-LVDS is a reduced voltage version of the LVDS electrical specification. Sub-LVDS varies from LVDS in that its common mode and differential signal levels are reduced, but are still able to drive an LVDS receiver. The problem arises when an LVDS driver needs to interface with a sub-LVDS receiver. Since the drivers’ signal voltage levels are not in a suitable range to ensure proper communication with the receiver, it is necessary to alter the drivers output to guarantee appropriate voltage levels. This application report discusses how to interface between an LVDS driver and sub-LVDS receiver and how a simple resistor network can be used to modify the signal voltage levels in a way to ensure compatibility.