Abstract
The synergistic effect of enhanced low dose rate sensitivity and single-event transients (SETs) in the bipolar dual operational amplifier LM158 is studied. The test results show a significant reduction in the SET amplitude and broadening in the SET waveform upon exposure to total ionizing dose radiation. These results are much more prominent for a low dose rate (LDR) irradiation of 0.01 rad(Si)/s than for a high dose rate irradiation of 10 rad(Si)/s. The greater gain degradation in the LM158 with LDR irradiation could be the direct cause of the reduction in the SET amplitude and broadening in the SET waveform, and this is corroborated through HSPICE simulations.
Highlights
The synergistic effect of the total ionizing dose (TID) and single-event transients (SETs) is a major concern for the hardness assurance testing of linear bipolar devices intended for space missions in consideration of the presence of particles, such as protons, electrons, and heavy ions in space
Typical SET waveforms of LM158 in non-inverter with gain (NIWG) +11, inverter with gain (IWG) 10, and voltage follower (VF) configurations are shown in Figs. 3–5, respectively
Compared with that in high dose rate (HDR) irradiation, the synergistic effect of the TID and SETs is more obvious in low dose rate (LDR) irradiation; the SET amplitude decreased, and the shape broadened sharply after LDR irradiation
Summary
The synergistic effect of the total ionizing dose (TID) and single-event transients (SETs) is a major concern for the hardness assurance testing of linear bipolar devices intended for space missions in consideration of the presence of particles, such as protons, electrons, and heavy ions in space. Some reports indicate that the TID can impact the shapes and sensitivities of SETs in the LM139 voltage comparator.. Recent studies on the LM124 operational amplifier show that the SETs are distorted by the TID such that one part becomes wider and another part becomes narrower, and significant variations in SET shapes due to the different TID sensitivities were observed following irradiation, highlighting manufacturer dependencies.. It is necessary to conduct further systematic research on other types of operational amplifiers to obtain more practical results and to determine whether the ELDRS can be further transmitted to the SETs. In this study, the SET variations of the LM158 operational amplifier in three configurations after 60Co-gamma ray irradiation at different dose rates 10 and 0.01 rad(Si)/s were investigated. The SET waveforms were collected using a PicoScope 6404D digital oscilloscope and stored in a computer terminal
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