Digital To Analog Converter Circuit

  
Figure A is an R/2R resistor ladder. Each switch that is closed increases the amount of current at . A simple channel A/D converter is shown in Fig. B. The voltage reference (D2) is common to all channels, but-the value of the dropping resistor (R9) varies as the number of DACs installed in the system. IC15 is a DAC0808 A/D converter chip.
Digital To Analog Converter Circuit - schematic

ICI6A is an op amp to interface the output current from the D/A convert to an analog voltage output.




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