DAC architectures

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

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

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