Emerging Internet of Things (IoT) applications require ultra-low voltage, reconfigurable, highly energy and power efficient integrated circuits (ICs) for sensing, computing and communicating, which are extremely challenging to be designed by traditional techniques. Interfaces towards the analog world, in particular, require medium-to-low resolution (8-12bit) data converters with a sample rate in the hundreds of kS/s range, capable to operate at supply voltages below 0.5V and achieving an energy figure of merit (FOM) in the order of 1fJ/(conversion step). In this framework, the thesis addresses the analysis and design in 40nm CMOS technology process of a Digital-to-Analog Converter (DAC) suitable to the challenges of IoT applications.