the msk 0002rh is a general purpose current amplifier. it is the industry wide rad tolerant replacement for the lh0002. the device is ideal for use with an operational amplifier in a closed loop configuration to increase current output. the msk 0002rh is designed with a symmetrical output stage that provides low output impedances to both the positive and negative portions of output pulses. the msk 0002rh is packaged in a hermetic 8 lead low profile t0-5 header and is specified over the full military temperature range. 4707 dey road liverpool, n.y. 13088 m.s.kennedy corp. (315) 701-6751 0002rh features: radiation hardened to 100 krads(si) (method 1019.7 condition a) radiation hardened lh0002 replacement high input impedance-180k min low output impedance-10 max low harmonic distortion dc to 30 mhz bandwidth slew rate is typically 400 v/ s operating range from5v to 20v available to dscc smd 5962-78013 equivalent non rad hard device msk 0002 description: equivalent schematic e4 v2- v1- input 1 2 3 4 v1+ v2+ e3 output 5 6 7 8 pin-out information high speed d/a conversion 30mhz buffer line driver precision current source typical applications mil-prf-38534 and 38535 certified facility 1 rad hard, high speed, buffer amplifier 8548-2 rev. d 10/12 case=isolated
supply voltage input voltage power dissipation case operating temperature (msk 0002k/h rh) (msk 0002rh) 20v 20v 600mw -55c to +125c -40c to +85c absolute maximum ratings t st t ld t j jc storage temperature range lead temperature range (10 seconds) junction temperature thermal resistance @ tc=125c output devices -65c to +150c +300c +175c 55c/w v cc v in p d tc 1 2 3 4 5 6 7 unless otherwise specified v cc =12v dc, r l= 1k . subgroups 5 & 6 shall be tested as part of device initial characterization and after design and process changes. parameter shall be guaranteed to the limits specified for subgroups 5 & 6 for all lots not specifically tested. devices shall be capable of meeting the parameter, but need not be tested. subgroup 1,4 t a =t c =+25c subgroup 2,5 t a =t c =+125c subgroup 3,6 t a =t c =-55c refer to smd 5962-78013 for electrical parameters for devices purchased as such. continuous operation at or above absolute maximum ratings may adversly effect the device performance and/or life cycle. pre and post irradiation limits at 25c, up to 100krad tid, are identical unless otherwise specified. notes: electrical specifications 2 7 8548-2 rev. d 10/12
application notes heat sinking to determine if a heat sink is necessary for your application and if so, what type, refer to the thermal model and governing equation below. r sa = ((t j - t a )/p d ) - (r jc ) - (r cs ) = ((125c - 80c) / 0.36w) - 55c/w - 0.15c/w = 125 - 55.15 = 69.9c/w this heat sink in this example must have a thermal resistance of no more than 69.9c/w to maintain a junction temperature of no more than +125c. t j= p d x (r jc +r cs + r sa ) +t a where t j =junction temperature pd=total power dissipation r jc =junction to case thermal resistance r cs =heat sink to ambient thermal resistance t c =case temperature t a =ambient temperature t s =sink temperature thermal model: 3 governing equation: example: this example demonstrates a worst case analysis for the buffer output stage. this occurs when the output voltage is 1/2 the power supply voltage. under this condition, maximum power transfer occurs and the output is under maximum stress. conditions: vcc= 12vdc vo= 6vp sine wave, freq. = 1khz rl= 100 for a worst case analysis we will treat the 6vp sine wave as an 6 vdc output voltage. 1.) find driver power dissipation pd= (vcc-vo) (vo/r l ) = (12v-6v) (6v/100 ) = 360mw 2.) for conservative design, set t j =+125c max. 3.) for this example, worst case t a =+80c 4.) r jc = 55 c/w from msk 0002rh data sheet 5.) r cs = 0.15 c/w for most thermal greases 6.) rearrange governing equation to solve for r sa typical applications: radiation performance curves for tid testing have been generated for all radiation testing performed by ms kennedy. these curves show performance trends throughout the tid test process and can be located in the msk 0002rh radiation test report. the complete radiation test report is available in the rad hard prod- ucts section on the msk website. total dose radiation test performance http://www.mskennedy.com/store.asp?pid=9951&catid=19680 8548-2 rev. d 10/12
typical performance curves 4 8548-2 rev. d 10/12
ordering information screening level msk0002rh msk0002hrh msk0002krh 5962-78013 the information contained herein is believed to be accurate at the time of printing. msk reserves the right to make changes to its products or specifications without notice, however, and assumes no liability for the use of its products. please visit our website for the most recent revision of this datasheet. mechanical specifications m.s. kennedy corp. 4707 dey road, liverpool, new york 13088 phone (315) 701-6751 fax (315) 701-6752 www.mskennedy.com part number 5 all dimensions are 0.010 inches unless otherwise labeled industrial mil-prf-38534 class h mil-prf-38534 class k dscc smd weight=1 gram typical 8548-2 rev. d 10/12
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