I think the most important spec for your opamp and comparator will be offset voltage. There's not really a 'gain' for the integrator, there's a volts/sec constant, and that's going to depend on your requirements. How fast do you need to do the conversion? How fast is your clock? It's going to take 2*2^14 (32786) clock cycles to do a conversion.
I think the most important spec for your opamp and comparator will be offset voltage. There's not really a 'gain' for the integrator, there's a volts/sec constant, and that's going to depend on your requirements.
In industry standard dual slope circuits, integrator and comparator offset voltage are eliminated, that's why these circuits achieve good performance with standard CMOS technology. Insufficient integrator gain however causes a linearity error due to deviation from ideal ramp waveform. Comparator response time causes a magnitude offset.