The RHF1401 is a 14-bit, 20MHz maximum sampling frequency analog-to-digital converter using pure (ELDRS-free) CMOS 0.25m technology combining high performance, radiation robustness and very low power consumption. The RHF1401 is based on a pipeline structure and digital error correction to provide excellent static linearity. Its very low internal noise permits to achieve more than 11.8 ENOB with a 2.2Vpp 5MHz input.