ANALOG TO DIGITAL TO ANALOG CONVERTER FOR MULIT-VALUED CURRENT DATA USING INTERNAL BINARY VOLTAGE

A data transmission system for interconnecting semiconductor integrated circuit devices, and a semiconductor integrated circuit adapted to the data transmission system are disclosed. The semiconductor integrated circuit has an input circuit, an internal circuit, and an output circuit. The input circuit has an ADC for converting a multi-value current data input from the outside to a collection of binary voltage level data. The internal circuit receives the collection of binary voltage level data from the ADC, and outputs the collection of binary voltage level data. The output circuit has a DAC for converting the collection of binary voltage level data output from the internal circuit to multi-value current data to output the multi-value current data to the outside.