This document discusses the use of the ADS1247 and ADS1248 precision analog-to-digital converters (ADCs) together with a resistive temperature device (RTD) and thermocouple to measure temperature. Included are detailed examples of the most common configurations of a two-wire RTD, a three-wire RTD, a four-wire RTD, and a thermocouple with cold junction compensation. This document provides sufficient information to enable several alternate configurations to be implemented.

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.