A low-power down-sampling mixer in a low-power digital 65 nm CMOS technology is presented. The mixer consumes only 830 ${mu}W$ at 1.2 V supply voltage by combining an NMOS and a PMOS mixer with cascade transistors at the output. The measured gain is (19 ${pm}$1 dB) at frequencies between 100 MHz and 3 GHz. An IIP3 of -5.9 dBm is achieved.