UM9441 MICROSEMI | Alldatasheet
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PIN RADIATION DETECTORS um9444 Features these devices is proportional only to the + High Photocurrent Sensitivity \\-region volume and is independent of tem- ¢ High Reliability Construction perature so long as applied voltage exceeds ¢ Fast Rise Time the saturation voltage. This structure also * Wide Dynamic Range minimizes the effects of permanent damage * Hardness to Neutron Bombardment caused by neutrons and other high energy * Low Operating Voltage radiation. Experiments on devices of the | 6 | UM9441 design show no degradation in Description gamma sensitivity resulting from a total Silicon PIN devices are effective detectors dose of 10% neutronsicm? of 1 MeV of nuclear and electromagnetic radiation. This @uivalent. includes gamma radiation, electrons and package X-rays. The detectors can he used across the The UM9441 is an axially leaded device arate range of 758 C to ue c constructed by metallurgically bonding the insta of being restricted to use at low tem- —_ Bn chip in between two molybdenum refrac- Peratures. tory pins that are typically 0.125 inches in The absorbed radiation produces electron- —_giameter and 0.050 inches long. Hyper-pure hole pairs in the space charge region. These gags is then fused over this bond to form a charges are swept out by the applied fleld and yoidless seal. Leads are then brazed to ends result in a current flow proportional to the rate of molybdenum pins. This results in a high- of absorbed radiation. . . . reliability package using materials so well The Microsemi UM9441 series utilizes high thermally matched that the UM9441 can resistivity material and is designed to have a__ withstand temperature shock or cycling from uniform area mesa structure to define the — 196°C ta +300°C. active volume. The current sensitivity of ABSOLUTE MAXIMUM RATINGS Storage Temperature... —55°C to + 200°C Operating Temperature . -55°C to + 175°C MECHANICAL SPECIFICATIONS uM9441 {YELLOW CATHODE BAND | casio 74 ramgoa wax - ) 508) £027 10.69)9% ‘ af sad Re — i (248 (3811 10a Dimensions in inches (mieters) Microsemi Corp. ! Watertown 641 [Tre dose eons
Electrical Specifications (at 25°C) [test Min [Typ | Max. [units [Test Conditions Va=50V ds (Si ma | 10°
2.5 MeV Flash X-Ray
lon Physics Corp. FX-25 [Capacitance | TT to pe = Miz, Vv = Sov [Reverse Curent [|i 0 | wk cv TYPICAL PHOTOCURRENT SENSITIVITY TYPICAL VOLTAGE SENSITIVITY 100 SE SSS RSORERDURAUORAAAROOREORE = Radiation Source — As Noted t¢t}—t—- Ft 80 ATT Serer a Saleen z Zz 50 aa = eee: E,, TTT = SSeS a = ee TTT
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3 ea 3 | ey 2924 2 Gt ee FSS Hi ee Radiation Source — 2s notes FERRE EO A | ss AY A | | i 2) Asam OT LAGI TTT TT EM "9 a ia BS is ° aN Heverse vonage (v) Absorbed Dose Rate “#48/S!) sec RELIABILITY I The UM9441 is consistent with Microsemi's reputation as a manufacturer of high reliability semiconductors. Microsemi is equipped to perform JAN type testing, base-lining and documental conformance to a wide range of reliability testing. This commitment to reliability has enabled Microsemi to be a qualified sup- plier of semiconductor devices to many high- reliability programs such as: APOLLO MINUTEMAN DRAGON SPRINT HAWK TRIDENT MARINER VIKING
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