US Patent 7126522 Apparatus and method of analog-to-digital conversion

An analog-to-digital conversion apparatus includes a register group, a selecting section and an A/D conversion section. The register group has a plurality of registers holding a plurality of channel specification data, respectively. The selecting section is connected with a plurality of analog channels, and sequentially selects the plurality of analog channels for analog-to-digital (A/D) conversion continuously without any idling time based on the plurality of channel specification data held by the plurality of registers. The A/D conversion section carries out the A/D conversion of an analog signal on each of the analog channels selected by the selecting section into a digital signal.