One major difference between a counter-ramp A/D converter and a successive-approximation converter is:

• the counter-ramp A/D converter is much faster than the successive-approximation converter
• with the successive-approximation converter the final binary result is always slightly less than the equivalent analog input, whereas with the counter-ramp A/D converter it is slightly more
• with the successive-approximation converter the final binary result is always slightly more than the equivalent analog input, whereas with the counter-ramp A/D converter it is slightly less
• none of the above