VHDL code for an Analog-to-Digital Converter (ADC) typically refers to a (like SPI or I2C) rather than the ADC conversion process itself, which is usually handled by dedicated external silicon . ADC Interfacing Methods in VHDL
Implementation varies significantly based on the ADC's hardware architecture and required speed. Go to product viewer dialog for this item. The Pi Hut MCP3008 8-Channel 10-Bit ADC With SPI Interface vhdl code for adc