Difference: RaDamIC (r6 vs. r5)

Irradiation Tests of Electronic Components

The irradiation tests were carried out at Gießen 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 L78M05CDT3.3 5.0 V positive low voltage drop-out regulator SOT223-5 DPAK 1040 83.8 / 4150 died yes at 430 Gy 12 4  
5.0 LP3855 V 3.3 V positive low drop-out regulator SOT223-5 1040 / 4150 died at 500 430 Gy 12 obsolete?
LP38692 5.0 V 3.3 V positive low drop-out regulator SOT223-5 1040 / 4150 died at 2 kGy? 500 Gy 12 obsolete?
5.0 LP38692 V 3.3 V positive low drop-out regulator SOT223-5 1040 / 4150 died at 2 kGy? 12  
LP3962 5.0 V 3.3 V positive low drop-out regulator SOT223-5 1200 1040 / 4150 yes died at 2 kGy? 8 12  
5.0 LP3962 V 3.3 V positive low drop-out regulator SOT223-5 1200 yes 8 obsolete
LT1175 5.0 V negative SOT223-5 low drop-out regulator SOT223 1200 1040 yes / 4150 died 8 at 630 Gy 12 obsolete  
LT1964 LT1175 5.0 V negative low drop-out regulator SOT23-5 SOT223 1040 / 4150 died at 90 630 Gy 12  
LTC6652 LT1964 precision voltage 5.0 V reference MSOP08 negative low drop-out regulator 1100 SOT23-5 yes 1040 / 4150 8 died at 90 Gy 12  
MAX1148 LTC6652 14-bit multichannel ADC precision voltage reference TSSOP20 MSOP08 1100 yes 8  
MAX4581 MAX1148 8:1 multiplexer 14-bit multichannel ADC TSSOP16 TSSOP20 1100 yes 10 8  
MAX4581 8:1 multiplexer TSSOP16 1100 yes 10  
MC79L05ACDG -5.0 V negative voltage regulator SOIC-8 83.8 yes 4  
MIC5200 3.3 V positive low drop-out regulator SO08 660 yes 8  
5.0 V SOT223 660 died immediately 8  
PCA82C250CAN transceiver SO08 1100 yes 8  
UA78L05ACDG 5.0 V positive voltage regulator SOIC-8 83.8 yes 4  
UA78M33CDCY 3.3 V positive voltage regulator SOT223 83.8 yes 4  

Parts with 2 values for the total dose where irradiated 19 hours at a distance of 20 cm (215 Gy/h, 4 parts) and 40 cm (54 Gy/h, 8 parts), respectively. The given "died at" values are the minimum dose these 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, but most of these sensors died at a dose of 550 to 700 Gy

-- FlorianFeldbauer - 03 Mar 2010

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