The AD573 is a 10-bit successive approximation analog-to-digital converter that includes a DAC, voltage reference, clock, comparator, successive approximation register (SAR) and three-state output buffers, all fabricated on a single chip. No external components are required to perform a full accuracy 10-bit conversion in 20 µs. The AD573 incorporates advanced integrated circuit design and processing technologies. The successive approximation technique is used to implement the conversion, which is a digital conversion technique in which the input signal is compared with the reference voltage at each conversion. The result of the comparison is the most significant bit that is discarded, and the other bits are used to calculate the next reference voltage.