SBAK019 May   2024 ADC3683-SP

 

  1.   1
  2.   2
  3.   Trademarks
  4. 1 Introduction
  5. 2 Single-Event Effects
  6. 3 Device and Test Board Information
  7. 4 Irradiation Facility and Setup
  8. 5 Depth, Range, and LETEFF Calculation
  9. 6 Test Setup and Procedures
  10. 7 Destructive Single-Event Effects (DSEE)
    1. 7.1 Single-Event Latch-Up (SEL) Results
  11. 8 Single-Event Transients (SET)
    1. 8.1 Single Event Transients
  12. 9 Event Rate Calculations
  13. 10Summary
  14. 11References

9 Event Rate Calculations

Event rates were calculated for LEO (ISS) and GEO environments by combining CREME96 orbital integral flux estimations and simplified SEE cross sections according to methods shown in Heavy Ion Orbital Environment Single-Event Effects Estimations.

A minimum shielding configuration of 100mils (2.54mm) of aluminum, and worst-week solar activity (this is similar to a 99% upper bound for the environment) is assumed. Using the 95% upper-bounds for the SEL and SET, the event rates for SEUs and SEFIs are listed in Table 9-1 and Table 9-3. Figure 9-1 and Figure 9-3 show the cross sections versus LETEFF .

Table 9-1 SET Event Rate Calculations of Total Events for Worst-Week LEO and GEO Orbits
Orbit Type Onset LETEFF (MeV-cm2/mg) σSAT (cm2) Event Rate (/day) Event Rate (FIT) MTBE (Years)
LEO (ISS) 7 2.25 × 10–5 4.20 × 10–6 1.75 × 102 6.52 × 102
GEO 3.32 × 10–5 1.38 × 103 8.26 × 101
Table 9-2 SET Event Rate Calculations of Short Events for Worst-Week LEO and GEO Orbits
Orbit Type Onset LETEFF (MeV-cm2/mg) σSAT (cm2) Event Rate (/day) Event Rate (FIT) MTBE (Years)
LEO (ISS) 7 1.43 × 10–5 6.69 × 10–6 2.79 × 102 4.10 × 102
GEO 5.32 × 10–5 2.22 × 103 5.15 × 101
Table 9-3 SET Event Rate Calculations of Long Events for Worst-Week LEO and GEO Orbits
Orbit Type Onset LETEFF (MeV-cm2/mg) σSAT (cm2) Event Rate (/day) Event Rate (FIT) MTBE (Years)
LEO (ISS) 12 1.31 × 10–5 8.17 × 10–7 3.40 × 101 3.35× 103
GEO 6.35 × 10–6 2.64 × 102 4.32 × 102
ADC3683-SP Cross Section Plot for All Events Figure 9-1 Cross Section Plot for All Events
ADC3683-SP Cross Section for Short Events Figure 9-2 Cross Section for Short Events
ADC3683-SP Cross Section for Long Events Figure 9-3 Cross Section for Long Events