1. DAC architectures

2. Resistor based DACs Series connected R-DAC Parallel connected R-DAC
R-string, segmented R-strings
Generates voltage output
Parallel connected R-DAC
Unary R-DACs, segmented unary R-DACs
Generates current outputs
R-2R ladder
Greatly reduced # of resistors
Generates either voltage or current output
Combination of R-string, ladder, unary

3. Current source DACs Current steering DACs Unary weighted I sources
High speed
Small area
Unary weighted I sources
Binary weighted I sources
Combination of both
There are other structures

4. Capacitor DACs C-DACs widely used Unary weighted Binary weighted
Segmented binary
Segmented unary
Combination of unary and binary
Combination of C-DAC and R-DAC