Pulse shaping for signal transmission over bandwidth limited channels and for sensor systems is very important to reduce the occupied bandwidth. In this work, an efficient, low-power concept for digital-to-waveform conversion is presented on a 22 nm CMOS node. A key characteristic is the approximation concept of a raised-cosine filter for waveform synthesis by non-binary weighting in the digital-to-analog converter keeping hardware complexity and thus power consumption low. Spectral side lobes of a pseudo-random bit stream example can be reduced by more than 20 dB at 24 GS/s and a power consumption of only about 30 mW.