The AD7193 is a 24-bit, 4-channel Sigma-Delta ADC with built-in PGA. More information can be found at http://www.analog.com/ad7193.
Tutorial can be found at https://ez.analog.com/docs/DOC-18020-ad7193-arduino-tutorial-thermocouple-measurements
The initial release of this library provides a simple set of functions to measure voltage per channel, capable of either differential or psuedo differential voltage measurements.
There are also basic examples to demonstrate differential and psuedo-differential measurement.
Also included is an example that measures voltage on a K-type thermocouple, and reports the resulting temperature.
This library is public domain, and provided as-is. This library was written in the author's spare time. Feedback and questions are welcome, but please lower your expectations regarding any response.