During the SEL testing the device was heated to 125°C by using a Closed-Loop PID controlled heat gun (MISTRAL 6 System [120V, 2400W]). The temperature of the die was constantly monitored during testing at TAMU through an IR camera integrated into the control loop to create closed-loop temperature control.

The species used for the SEL testing was 1??Ag at 15MeV/nucleon. For 1??Ag an angle of incidence of 0° was used to achieve an LET_EFF of ≈ 47.5MeVcm²/mg. The kinetic energy in the vacuum for 1??Ag is 1.634GeV. Flux of approximately 1.00 × 10⁵- 1.15 × 10⁵ ions/cm2 × s and a fluence of 1.00 × 10⁷– 1.50 × 10⁷ ions/cm² per run was used. Run duration to achieve this fluence was approximately two minutes. The three devices were powered up and exposed to the heavy-ions using the maximum recommended input voltage of 3.8V for VCC – VEE and 2V for VEE – GND and a recommended output voltage of 400mV |VIH-VIL|. No SEL events were observed during all four runs, indicating that the CDCLVP111-SEP is SEL-free up to 47.5MeVcm²/mg.

Table 8-3 shows the SEL test conditions and results. Figure 7-1 shows a plot of the current versus time for run number three.

Using the MFTF method described in Single-Event Effects (SEE) Confidence Interval Calculations application report and combining (or summing) the fluences of the eight runs at 125°C (9.24 × 10⁷), the upper-bound cross-section (using a 95% confidence level) is calculated as:

σ_SEL ≤ 3.99 × 10^-8 cm²/device for LET_EFF = 47.5MeVcm²/mg and T = 125°C.

Figure 7-1 Current versus Time for Run # 71 of the CDCLVP111-SEP at T = 125°C, VEE - GND Supply

Figure 7-2 Current versus Time for Run # 71 of the CDCLVP111-SEP at T = 125°C, VCC - VEE Supply