Total Dose Effect of 10-bit Bipolar D/A Converter Under Different ~(60)Co γ Dose Rates
Yue Yu · Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms · 2009
In order to find the responses of digital-to-analog(D/A) converters in ion-izing radiation environment,total dose effect and room-temperature annealing behavior of a 10-bit bipolar D/A converter irradiated by different 60Co γ dose rates were investigated.The D/A converter is quite sensitive to dose rates,and its functions are normal at high dose rate irradiation.While under low-dose-rate case,it works out of the way and many parameters go beyond its permitted range.Thus,it exhibits an enhanced low-dose-rate sensitivity effect.Finally,possible mechanism was discussed based on the space charge model.