A Radiation-hardened Time-to-Digital Converter chip with 8 ps Single-Shot Precision

A rad-hard-by-design time-to-digital converter ASIC with 8 ps single-shot precision has been developed and radiation qualified for space. The device has been qualified up to 110 krad (Si) total ionizing dose and verified to be SEL-free up to 81.6 MeV·cm²/mg. The TDC demonstrates stable performance across temperature, voltage, and radiation stress, confirming the robustness of the applied rad-hard-by-design methodology. Electrical and radiation test results are presented, demonstrating excellent resilience against both total ionizing dose and single-event effects.