A 10/100/1000 Ethernet Physical Layer device has multiple connections and many possible configuration options. While the DP83867 is designed with a priority on ease of use, there are many factors to consider during initial board bring up. This application note provides guidance on the key criteria to verify in order to expedite initial validation of DP83867 applications.

The goal of this application note is to describe a flow to identify the most likely source of problems during board bring up. For a quick start guide, please see the Troubleshooting Checklist in Section 3 at the end of this application note.

This application report addresses three key criteria for selecting an ESD device for protecting high-speed signals. As the industry continues to trend towards smaller chipset features sizes to address higher speed data rates, tolerance of transient voltages has continued to shrink as well. Picking the right ESD device the first time is critical to preventing costly board re-spins during EMC testing. By using the three techniques discussed in this paper, device selection can be greatly simplified and streamlined.

In a camera, the lens ensures that light coming from a given point in a scene reaches a given pixel. When an ideal lens is in perfect focus, light coming from a given point in the image will reach a given pixel only. This is an important optical component which enables cameras, including 3D time-of-flight (ToF) cameras, to work. 3D ToF cameras have certain distinct characteristics which have special requirements to be met with while selecting or designing the lenses. This document explains how to decide the specifications for 3D ToF cameras. It also describes how to choose or design lens holders.