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The phase-2 upgrade of the LHC will require novel pixel readout chips, whichdeliver hit information at drastically increased data rates and tolerateunprecedented radiation levels. The large-scale prototype chip RD53A has beendesigned by the RD53 collaboration and manufactured in a 65 nm CMOS process,suitable for the innermost layers of both the ATLAS and the CMS experiment. Inorder to verify the radiation hardness design goal of 500 Mrad total ionizingdose, RD53A has been irradiated using X-rays. The radiation effects on theperformance of the data link, reset circuit and the clock generation have beeninvestigated. Furthermore, the operating margins in terms of supply voltage andfrequency have been analyzed.

Radiation-induced Effects on Data Integrity and Link Stability of the RD53A Pixel Readout Chip