Delta-Sigma Data Converters: Theory, Design, and Simulation

This along with Green Book (Understanding Delta-Sigma Data Converters by Richard Schreier and Gabor C. Temes) & the Blue book (Oversampling Delta-Sigma Data Converters: Theory, Design, and Simulation by James C. Candy and Gabor C. Temes ) form a triad of delta sigma ADC books you will have to read, if you are serious about understanding,designing delta sigma ADC and getting it to work in silicon.