SUCCESSIVE APPROXIMATION ADC

This is the method of addressing the shortcomings of digital ramp ADC and this is so-called successive-approximation ADC. It has the only change in its design is a very special counter circuit that is known as a successive approximation register. Instead to count up in binary sequence, this register counts by trying all values of bits that starts with the most-significant bit and ends at the least-significant bit. Throughout this counting process, the register monitors the comparator's output to look for whether the binary count is less than or more than the analog signal input, and thereby adjusting the bit values accordingly.

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