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
BAT54S		schottky diode	SOT-23	80	yes	2
HIH-4000		humidity sensor		1040 / 4150	died at 550 Gy	12
HSMS2822		schottky diode	SOT-23	80	yes	2
INA138		current shunt monitor	SOT-23	80	yes	2
L78M05CDT	5.0 V	positive voltage regulator	DPAK	83.8	yes	4
LM337L	-1.2V to 37V	adjustable neg. voltage regulator	SOT-223	80	yes	2
LM317L	1.2V to 37V	adjustable pos. voltage regulator	SOT-223	80	yes	2
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	died at 2 kGy?	12
	5.0 V		SOT223-5	1040 / 4150	died at 2 kGy?	12
LP3962	3.3 V	positive low drop-out regulator	SOT223-5	1200	yes	8
	5.0 V		SOT223-5	1200	yes	8	obsolete
LS Q976		LED	0603	80	yes	2
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
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
PCA82C250		CAN 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