XPS Delta-Sigma Analog to Digital Converter (ADC) (v1.01a)(DS587) - 2.2 English - When digital systems are used in real-world applications, it is often necessary to convert an analog voltage level to a binary number. The value of this number is directly or inversely proportional to the voltage. The analog to digital conversion is realized in the XPS Delta-Sigma ADC (XPS ADC) using Delta-Sigma conversion technique. This soft IP core isdesigned to interface with the PLB (Processor Local Bus).