While the ADC tells us the ratio between the input and a reference, we say it is a divider. However, the DAC output is the product of the input word and its reference, so it is a multiplier. Both the ADC and the DAC have a gain factor that is most often unity.
Just as the ADC analog input can be a voltage or a current, the DAC analog output can be a voltage or a current.
It's True! The output impedance of the DAC can be high or it can be low, depending upon the design of the DAC.
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