There are many designs for DACs which have evolved over the past twenty years or so.
DACs can be classified by whether they use bipolar junction transistor switches, or MOS
transistor technology. The following DAC architectures are found with MOS technology:
1. Binary weighted resistor DAC
2. R-2R ladder
3. Inverted R-2R ladder
4. Inherent monolithic ladder
5. Switched capacitor DAC
The following DAC designs generally use BJT technology:
1. Binary weighted current sources
2. R-2R Ladder using current sources