The proposed radiation hardened ADC will be developed primarily targeting the application in NASA's magnetometers. Low power, small size, high precision, self-calibrating magnetometers are required for virtually any Earth and space science mission. The proposed ADC provides a flexible digitizer solution for the SoCs, SIPs and ASICs that are required to meet the radiation hardness, high performance, size and weight requirements of space applications. Potential NASA applications for the ADC include devices for the spacecraft equipment used during such NASA missions as ICON, GOLD, Solar Orbiter, Solar Probe Plus, ONEP, SEPAT, INCA, CISR, DGC, HMag and planetary exploration. The proposed low power sigma-delta ADC has wide area of commercial applications including wideband receivers, space communication systems, navigation systems, high precision measurement electronics, medical electronics, high complexity reconfigurable receiving and readout circuits, automotive electronics, and portable devices.