QLF08_LaBel.pdf - 第19页
IC and Component Selection for Space Sy stems – Presented by Kenneth A . LaBel 19 Archival Radiation Performance – Flight Heritage • Can we make use of parts with flight heritage and no ground data for new mission? • Sim…
IC and Component Selection for Space Systems – Presented by Kenneth A. LaBel
18
Archival Radiation Performance –
Ground-based Data
• Reviewing existing ground radiation test data on a IC and
it’s application has been discussed previously
– For example. Christian Poivey at NSREC Short Course in 2002
– Using a “similar” device with data is risky, but sometimes
considered (though not recommended)
• In general, the flow is shown below
Does data
exist?
Same
wafer lot?
Sufficient
test data?
Test method
applicable?
Has
process/foundry
changed?
YES
NO
Test recommended but may be
waived based on risk
assumption
NO
YES
Data usable
YES
Test
Test
YES
NO
NO
NO
YES
IC and Component Selection for Space Systems – Presented by Kenneth A. LaBel
19
Archival Radiation Performance –
Flight Heritage
• Can we make use of parts with
flight heritage and no ground
data for new mission?
• Similar flow to using archival
ground data exist, but consider
as well
– Statistical significance of the
flight data
• Environment severity?
• Number of samples?
• Length of mission?
– Has storage of devices affected
radiation tolerance or reliability?
– And so forth
• This approach is rarely
recommended by the radiation
experts
Some heritage designs last
better than others
IC and Component Selection for Space Systems – Presented by Kenneth A. LaBel
20
IC’s with no Guarantee or Heritage
• Radiation testing is required in
the vast majority of cases
– Testing complexities and
challenges are discussed
elsewhere (e.g., Swift during this
short course, LaBel during the
conference)
– The true challenge is to gather
sufficient data in a cost and
schedule effective manner.
• A backup plan should be made in
case device fails to pass radiation
criteria.
• Reliability testing has similar
concerns
FPGA-based motherboard
SDRAM mounted on a daughtercard
“Abandon all hope, ye’ who enter here”