1. An apparatus for convening an input analog voltage signal into a corresponding digital signal comprising: a means for dividing a reference voltage potential coupled between first and second nodes into a first set of voltages; a plurality of amplification means for providing a second set of voltages, each of said second set of voltages being the amplified difference between said input analog voltage signal and each of said first set of voltages; a plurality of means for summing and comparing voltages, each of said summing and comparing means having multiple inputs and an output said plurality of summing and comparing means being grouped into sets of summing and comparing means each of said sets of summing and comparing means being directly coupled between first and second contiguous voltages within said second set of voltages; wherein each of said summing and comparing means within said each of said sets of summing and comparing means has a first group of its multiple inputs directly coupled to said first contiguous voltage and has a second group of its multiple inputs directly coupled to said second contiguous voltage such that said each of said summing and comparing means within each of said sets of summing and comparing means has a different cumulative input voltage coupled to its multiple inputs.