I'm looking for advice on ICs and circuit designs for getting a reasonably accurate DC voltage reading and displaying it on an LCD. I need accuracy of +/- 0.01V and I need to display at least 2 decimals (.xy), 3 decimals would be ideal (.xyz).

The goal is to read the output from a sensor and display the reading to the user. The sensor output is steady state DC from 5.0V to 0.1V. My circuit power source will be a 9V battery, and there will be an accurate 5.00V reference on-board. I'm new to this type of circuit, any advice is welcome and much appreciated!

 

In case this helps someone else; I'm not sure yet if this has the required accuracy, but this is the general idea for what I'm looking to do:

http://www.electronics-lab.com/projects/test/001/

Using this IC:

http://www.intersil.com/content/dam/Intersil/documents/icl7/icl7106-07-07s.pdf