![]() The DAC generates analog output voltage corresponding to the given digital data signal. All the digital input bits are simultaneously applied to the DAC. When the logic circuit receives binary 0, the switch connects the resistor to ground. When the receiving binary 1 the switch connects the resistor to the reference voltage. The input resistors of the op-amp have their resistance values weighted in a binary format. ![]() In the voltage domain, that is if the input signals are voltages, the addition of the binary bits can be achieved using the inverting summing amplifier shown in the above figure. In the voltage domain, that is if the input signals are voltages, the addition of the binary bits can be achieved using the inverting summing amplifier shown in the below figure. ![]() The basic operation of DAC is the ability to add inputs that will ultimately correspond to the contributions of the various bits of the digital input. The below shown schematic diagram is DAC using weighted resistors. ![]() There are two methods commonly used for digital to analog conversion: Weighted Resistors method and the other one is using the R-2R ladder network method. Basic Digital to Analog Converter D/A Converter Architectures ![]()
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