4707 dey road liverpool, n.y. 13088 m.s.kennedy corp. (315) 701-6751 features: 738 inverting very fast settling time very fast slew rate wide bandwidth low noise very accurate (low offset) contact msk for mil-prf-38534 qualification status mil-prf-38534 certified description: the msk 738 is an inverting operational amplifier that exhibits an impressive combination of high speed and precision d.c. characteristics. the op-amp's very fast slew rate, very fast settling time and wide bandwidth, along with its ex- tremely low input offset voltage, offset drift and low noise, make it an outstanding performer. equivalent schematic typical applications typical applications pin-out information high performance data aquisition coaxial line driver data conversion circuits high speed communications compensation negative power supply nc inverting input non-inverting input ground 1 2 3 4 5 6 balance balance positive power supply nc output case connection 7 8 9 10 11 12 rev. c 9/06 1 equivalent schematic operational amplifier
static supply voltage range quiescent current thermal resistance input input offset voltage input offset voltage drift input offset adjust input bias current input offset current input impedance power supply rejection ratio input noise voltage input noise voltage density input noise current density output output voltage swing output current settling time 1 full power bandwidth bandwidth (small signal) transfer characteristics supply voltage peak output current differential input voltage case operating temperature range (msk 738b/e) -55c to+125c (msk 738) -40c to +85c storage temperature range -65c to +150c lead temperature range 300c (10 seconds soldering) power dissipation see curve junction temperature 150c group a subgroup - 1 2,3 - 1 2,3 1 2,3 1 2,3 1 2,3 - - - - - 4 4 4 4 4 4 4 v ma ma c/w v v/c mv mv na na na na m w v/v vp-p nv ? hz pa ? hz v ma ns mhz mhz v/s v in =0v a v =-1v/v junction to case output devices bal. pins=nc v in =0v a v =-100v/v v in =0v r pot =10k w to+v cc a v =-1v/v v cm =0v either input v cm =0v f=dc differential d v cc =5v f= 0.1hz to 10hz f=1khz f=1khz r l =100 w a v =-3v/v f 20mhz a v =-3v/v t j <150c 0.1% 10v step r l =100 w vo=10v r l =100 w v out =10v r l =100 w av=-1.5v/v +18v 200ma 12v v cc i out v in t c parameter t st t ld p d t j electrical specifications absolute maximum ratings test conditions notes: av= -1, measured in false summing junction circuit. guaranteed by design but not tested. typical parameters are representative of actual device performance but are for reference o nly. industrial grade and "e" suffix devices shall be tested to subgroups 1 and 4 unless otherwise specified. military grade devices ("b" suffix) shall be 100% tested to subgroups 1,2,3 and 4. subgroups 5 and 6 testing available upon request. subgroup 1,4 subgroup 2,5 subgroup 3,6 measurement taken 0.5 seconds after application of power using automatic test equipment. continuous operation at or above absolute maximum ratings may adversely effect the device performance and/or life cycle. t a =t c =+25c t a =t c =+125c t a =t c =-55c msk 738b/e min. 12 - - - - - - - - - - - - - - 10 100 - 20 175 typ. 15 39 40 46 25 0.5 10 20 2 5 5 1 0.15 3.8 0.6 12 120 30 22 200 3500 max. 18 40 42 - 75 1 40 80 20 40 - 10 - - - - - 40 - - - typ. 15 39 - 46 50 - - 20 - 10 - 5 2 0.2 4 0.7 11.8 120 35 20 190 msk 738 min. 12 - - - - - - - - - - - - - - - 10 100 - 15 165 3500 max. 18 42 - - 100 - - 60 - 30 - - 20 - - - - - 45 - - - units rev. c 9/06 2 slew rate 3200 3200 100 110 - 95 105 - db 2 2 vcc=15v unless otherwise specified 1 5 7 8 3 4 2 6 adjust to zero adjust to zero 2 2 2 2 2 7 2 adjust to zero 2 2 2 open loop voltage gain r l =1k w f=1khz v out =10v 8
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. governing equation: example : this example demonstrates a worst case analysis for the op-amp output stage. this occurs when the output voltage is 1/2 the power supply voltage. under this condition, maximum power transfer oc- curs and the output is under maximum stress. conditions: v cc =16vdc v o =8vp sine wave, freq.=1khz r l =100 w for a worst case analysis we will treat the +8vp sine wave as an 8vdc output voltage. 1.) find driver power dissipation p d =(vcc-vo) (vo/rl) =(16v-8v) (8v/100 w ) =0.64w 2.) for conservative design, set t j =+125c 3.) for this example, worst case t a =+90c 4.) r q jc =46c/w from msk 738b data sheet 5.) r q cs =0.15c/w for most thermal greases 6.) rearrange governing equation to solve for r q sa r q sa =(( t j - t a )/ p d ) - ( r q jc ) - ( r q cs ) =((125c -90c)/0.64w) - 45c/w - 0.15c/w =54.7 - 46.15 =8.5c/w rev. c 9/06 3 t j = p d x (r q jc + r q cs + r q sa ) + t a where t j= junction temperature p d= total power dissipation r q jc= junction to case thermal resistance r q cs= case to heat sink thermal resistance r q sa= heat sink to ambient thermal resistance t c= case temperature t a= ambient temperature t s= sink temperature potentiometer values ranging from 1k w to 1m w can be used with only a small amount of degradation (typically 0.15 to 0.25v/c) of input offset voltage drift. if the input offset voltage is to be trimmed to a value other than "zero", the following formula can be used to approximate the change in input offset voltage drift: d v osd =v os (trimmed)/250 recommended external component selection guide approximate desired gain ri(+) ri(-) rf(ext) cf -1 499 w 1k w 1k w -2 330 w 499 w 1k w -5 169 w 200 w 1k w -8 100 w 124 w 1k w 90.9 w 100 w 1k w -20 -10 100 w 100 w 2k w 1 the positive input resistor is selected to minimize any bias current induced offset voltage. 2 the feedback capacitor will help compensate for stray input capacitance. the value of this capacitor can be dependent on individual applications. a 2 to 9 pf capacitor is usually optimum for most applications. thermal model: the heat sink in this example must have a thermal resistance of no more than 8.5c/w to maintain a junction temperature of no more than +125c. offset null typically, the msk 738(b) has an input offset voltage of less than 25v. if it is desirable to adjust the offset closer to "zero", or to a value other than "zero", the circuit below is recommended. r p should be a ten-turn 10k w potentiometer. typical offset adjust is 5mv. 2 2 2 2 2 2 1 1 1 1 1 1 1f 1f 1f 1f 1f 1f c1
typical performance curves rev. c 9/06 4
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. contact msk for mil-prf-38534 qualification status. mechanical specifications m.s. kennedy corp. 4707 dey road, liverpool, new york 13088 phone (315) 701-6751 fax (315) 701-6752 www.mskennedy.com note: all dimensions are 0.010 inches unless otherwise labeled. ordering information rev. c 9/06 5 note:standard cover height: msk 738 0.200 max. alternate lid heights available msk738 b screening general part number blank=industrial; b=mil-prf-38534 class h e=extended reliability weight=3 grams typical
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