(1) Acronym for ATA Disk on Chip. ADC is a chip that contains both a solid state disk (SSD) and an ATAPI bus interface. ADC is housed in a 600 mm 32-pin DIP package and uses a standard ATA/IDE protocol. ATA Disk on Chip is most commonly used in thin client systems, PDAs and other small form factor devices.
(2) Short for analog-to-digital converter.