Open AccessTotal Ionizing Dose Effect and Failure Mechanism of Digital Signal Processor
Author(s) -
Xin YU,
Wu LU,
Xiaolong LI,
Mohan LIU,
Xin WANG,
Jing SUN,
Qi GUO
Publication year - 2021
Publication title -
chinese journal of electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.267
H-Index - 25
eISSN - 2075-5597
pISSN - 1022-4653
DOI - 10.1049/cje.2021.07.010
Subject(s) - digital signal processing , computer science , ionizing radiation , radiation hardening , radiation , digital signal processor , inverter , electronic engineering , computer hardware , physics , electrical engineering , voltage , irradiation , engineering , optics , nuclear physics
Ionizing radiation effect and failure mechanism of Digital signal processor (DSP) is studied through test‐board and automatic test equipment to find the relationship between system function failure and parameter degradation. Static bias is more sensitive than dynamic bias when DSP is tested on‐line during radiation. Core current, high‐Z leakage current and timing parameter are sensitive to ionizing radiation. No enhanced low‐dose‐rate sensitivity is found by comparing experiment results under high and low dose rate radiation. External memory interface and Timer are deduced to be the sensitive module by step radiation and analysis basing full parameter test in Verigy 93000. The timing parameter degradation have a strong correlation to these module functions. And the degeneration mechanism is analysed on inverter through Hspice simulation which indicate the leakage circuit caused by radiation can lead a delay to the digital signal propagating. The parasitical capacitance among long connections make it worse to the data transmission around DSP, field programmable gate array and memory. Then an early function failure occurs in test board than Verigy 93000. This work provide support to systematic radiation hardness design and hardness assurance/lot acceptance testing in space applications.