SLAK033 December   2024 DAC121S101-SEP

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Overview
  5. 2SEE Mechanisms
  6. 3Test Device and Test Board Information
  7. 4Irradiation Facility and Setup
  8. 5Single-Event Latch-Up Results
  9. 6Summary
  10. 7Confidence Interval Calculations
  11. 8References

5 Single-Event Latch-Up Results

During SEL characterization, the device was heated using forced hot air, maintaining the device temperature at 125°C. The temperature was monitored by means of a K-type thermocouple attached as close to the device as possible. The species used for SEL testing was a silver (47Ag) ion with an angle-of-incidence of 0° for an LETEFF = 43 MeV-cm2/mg. The kinetic energy in the vacuum for this ion is 1.634 GeV (15-MeV/amu line). A flux of approximately 105 ions/s-cm2and a fluence of approximately 107 ions/cm were used for three runs. The external voltage with the highest recommended voltage of 5.5V is applied onboard VA connector. The run duration to achieve this fluence was approximately 2 minutes. As shown in Table 5-1, no SEL events were observed during these three runs. Figure 5-1 shows the current plot vs time during beam exposure.

Table 5-1 DAC121S101-SEP SEL Conditions Using 47Ag at an Angle-of-Incidence of 0°
Run #Distance
(mm)		Temperature
(°C)		IonAngleFlux
(ions×cm2/mg)		Fluence
(# ions)		LETEFF
(MeV.cm2/mg)
140125Ag0°1.00E+051.00E+0743
240125Ag0°1.00E+051.00E+0743

3

40

125

Ag

0°1.00E+051.50E+07

43

No SEL events were observed, indicating that the DAC121S101-SEP is SEL-immune at LETEFF = 43 MeV-cm2/mg and T = 125°C. Using the MFTF method described in Section 7 and combining (or summing) the fluences of the three runs at 125°C , the upper-bound cross section (using a 95% confidence level) is calculated in Equation 1:

Equation 1. σSEL ≤ 0.703× 10–7 cm2

where:

  • LETEFF = 43 MeV-cm2/mg
  • T = 125°C
Current versus Time (I versus t) Data for VA Current During SEL RunFigure 5-1 Current versus Time (I versus t) Data for VA Current During SEL Run