Irradiation Tests of Electronic Components

The irradiation tests were carried out at Gie├čen Irradiation Facility, where the ICs were irradiated with a Co60-source, which emits two photons with an energy of 1.17 and 1.33 MeV by its decay. The source has an activity of 1013 Bq, thus a rate of about 215 Gy/h at a distance of 20 cm and 54 Gy/h at a distance of 40 cm, respectively, can be achieved. The table below shows the results of the irradiation tests:

Part Description Package Total dose [Gy] Survived Tested qty Comment
78XX 3.3 V positive voltage regulator TO220 1200 yes 8  
12.0 V TO220 1200 yes 8  
79XX 12.0 V negative voltage regulator TO220 1200 yes 8  
AD623 rail-to-rail instrumentation amplifier MSOP08 1100 yes 10  
AD8554 rail-to-rail quad operational amplifier TSSOP14 1100 yes 8  
AT90CAN64 8 bit AVR microcontroller TQFP64 720 yes 8  
HIH-4000 humidity sensor   1040 / 4150 died at 550 Gy 12  
LP3855 3.3 V positive low drop-out regulator SOT223-5 1040 / 4150 died at 430 Gy 12  
5.0 V SOT223-5 1040 / 4150 died at 500 Gy 12 obsolete?
LP38692 3.3 V positive low drop-out regulator SOT223-5 1040 / 4150 yes 12  
5.0 V SOT223-5 1040 / 4150 yes 12  
LP3962 3.3 V positive low drop-out regulator SOT223-5 1200 yes 8  
5.0 V SOT223-5 1200 yes 8 obsolete
LT1175 5.0 V negative low drop-out regulator SOT223 1040 / 4150 died at 630 Gy 12  
LT1964 5.0 V negative low drop-out regulator SOT23-5 1040 / 4150 died at 90 Gy 12  
LTC6652 precision voltage reference MSOP08 1100 yes 8  
MAX1148 14-bit multichannel ADC TSSOP20 1100 yes 8  
MAX4581 8:1 multiplexer TSSOP16 1100 yes 10  
MIC5200 3.3 V positive low drop-out regulator SO08 660 yes 8  
5.0 V SOT223 660 died immediately 8  
PCA82C250 CAN transceiver SO08 1100 yes 8  

Parts with 2 values for the total dose where irradiated 19 hours at a distance of 20 cm (215 Gy/h) and 40 cm (54 Gy/h), respectively. The given "died at" values are the minimum dose the parts withstood! In particular the maximum dose which the humidity sensors HIH-4000 withstand seems to have a large spread! In out measurement some sensors withstood a total dose of 1.6 kGy or even more. -- FlorianFeldbauer - 03 Mar 2010

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