I am looking for a DAC design wıth NMOS and PMOS transistors as a part of a project, most of the DAC circuits that I found were builted with R-2R or with capacitors. But I need a design with MOS transistor since the porject will be implemented on Cadence and space consideration is important. DAC will be used both in 8-bit SAR ADC and in smooting filter. Sample block diagram of the project is given below, ı could not find appropriate design for DAC. Any help will be appreciated, thanks in advance.