Si5345, SY88422L, LT3482, and MSK130 components Total Ionizing Dose Test Report

The purpose of this test was to characterize the SI-5345, SY88422L, LT3482 and MSK130
parameter degradation for total dose response. The components are associated with REAG ID
#21-024. In the test, each device was exposed to high dose rate (HDR) irradiation using gamma
radiation. Device parameters such as leakage currents, timing, and overall chip health were
investigated. These devices were tested for an interstellar mission on a trajectory between 0.9
AU and 5.3 AU with a 2.5-year mission, yielding an expected overall dose of 29 krad(Si)behind
1 mm of aluminum shielding (at 95% confidence; environment and dose determined through
SPENVIS).

This test report gives an initial look at candidate parts. Extremely small sample sizes (only 1 or 2
devices tested) do not allow consideration of part-to-part variability. High dose rates were used
despite LT3482 and MSK130 having potential enhanced low dose rate sensitivity (ELDRS).
Care should be taken in interpreting results given these limitations.