manufactured using rh6105 dice radiation hardened to 100 krad(si) (method 1019.7 condition a) low dose rate hardened to 50 krad(si) (method 1019.7 condition d) neutron tested to 5x10 n/cm2 (method 1017.2) very wide input common mode range extends 44v above v- (independent of v+) extends -0.3v below v- wide power supply range: 2.85v to 36v input offset voltage: 400 v maximum gain accuracy: 1% max gain configurable with external resistors operating current: 195 a typ. per amp slew rate: 2v/ s sense input current when powered down: <1 a full-scale output current: 1ma minimum non-rad hard edu's available m.s.kennedy corp. features: typical applications pin-out information 496rh rad hard quad precision rail to rail current sense amp mil-prf-38534 & 38535 certified facility 1 1 2 3 4 5 6 7 8 description: equivalent schematic the msk496rh is a radiation hardened quad precision micropower current sense amplifier with a very wide input common mode range. with over-the-top ? technology, the msk496rh is capable of sensing in high side or low side applications.this combined with external gain setting, and common mode and power supply rejection in excess of 100db, make the msk496rh well suited for a variety of current sensing applications. the msk496rh is hermetically sealed in a 16 pin flat pack, and is av ailable with straight or gull wing lead form. high side or low side current sensing current monitoring on positive or negative supply voltages battery monitoring fuse/mosfet monitoring power management 16 15 14 13 12 11 10 9 vout 1 +in 1 -in 1 v- vout 2 case +in 2 -in 2 -in 4 +in 4 case vout 4 v+ -in 3 +in 3 vout 3 8548-89 rev. i 10/14 11
input voltage (+in, -in to v-) differential input voltage total supply voltage from v- output short circuit duration storage temperature range lead temperature range (10 seconds) junction temperature case operating temperature range msk496krh/hrh msk496rh msk496edu esd rating 2 -65c to +150c 300c 150c -55c to+125c -40c to +85c -40c to +85c class 1b -9.5v to 44v 44v 36v indefinite absolute maximum ratings t st t ld t j t c electrical specifications 9 unless otherwise specified; v+=12v, v-=0v, v s +=12v, r in1 =r in2 =100 , r out =5k(a v = 50), v sense =(v s +)-(v s -). guaranteed by design but not tested. typical parameters are representative of device performance but are for reference only. a heat sink may be required to keep the junction temperature below absolute maximum ratings. industrial grade devices shall be tested to subgroup 1 and 4 unless otherwise specified. military grade devices ( "h" and "k" suffix) shall be 100% tested to subgroups 1,2,3, and 4 subgroup 5 & 6 testing available upon request. subgroup 1,4 tc = +25c subgroup 2,5 tc = +125c subgroup 3,6 tc = -55c continuous operation at or above absolute maximum ratings may adversely affect the device performance and/or life cycle. pre and post irradiation limits at 25c, up to 100 krad(si) tid (condition a) and 50 krad(si) tid (condition d), are identical unless otherwise specified. msk496edu does not use rad hard die, post irradiation specifications are not applicable. internal solder reflow temperature is 180c, do not exceed. 4 notes: 11 1 2 3 4 5 6 7 8 9 10 11 12 12 8548-89 rev. i 10/14
application notes 3 pin functions -inx- the -in pin is the negative input terminal of the sense amplifier. voltages as high as 44v can be applied to the pin, relative to the negative supply pin v-. +inx - the +in pin is the positive input terminal of the sense amplifier. voltages as high as 44v can be applied to the pin, relative to the negative supply pin v-. v+ - the v + pin is the positive power supply for all amplifiers. operational currents are sourced from this pin independent of the voltages on the -in and +in pins. v- - the v- pin is the negative power supply for all amplifiers. connect to the negative supply voltage or circuit ground for single supply opperation. voutx - the vout pin is the output of the amplifier. the volt- age at the output is a function of both the input differential (v sense v os ), and the voltage gain r out /r in1 , for r in1 = r in2 . (see typical application ckt for more detail) vout=r out /r in x (v sense v os ) set r in1 =r in2 for best accuracy case - pins 6 and 14 provide an electrical connection to the device package only. these pins are isolated from the internal circuit. tie to a low impedance source or system ground to mini- mize coupling between amplifiers. sense resistor choose a r sense resistor value just large enough to cover the application dynamic range to minimize power dissipation losses. the low 100 v typical offset voltage helps to maintain high resolution while minimizing power dissipation. kelvin connection of the input resistors to the sense resistor is recommended to minimize error in high current applications. additional application information for additional applications information, please reference linear technology corporation's? lt6105 data sheet. radiation test performance radiation performance curves have been generated for all radia- tion testing performed by ms kennedy. these curves show per- formance trends throughout each test process and are located in the msk196rh radiation test report. the complete radiation test report is available in the rad hard products section on the msk website. typical application ckt high voltage sensing for high voltage applications, the msk496rh can be used with external mosfets. the mosfets protect the device from the full potential of the high voltage supply. the high voltage supply is the positive rail of the device, and the zener voltage minus the v gs(on) potential of q2 determines the negative voltage rail for the device; (v-)=(v+)-(v z -v gs ). the device can safely sense current from 0.3v below the negative rail up to 44v above it indepen- dent of high voltage supply, and deliver a ground referenced sig- nal via q1. the values in the application circuit are provided for reference. they may need to be adjusted based on specific appli- cation requirements. high voltage simple current monitor 8548-89 rev. i 10/14
typical performance curves 4 8548-89 rev. i 10/14
mechanical specifications 5 ordering information the above example is a class k screened device with straight leads. for non-rad hard engineering units, order msk496edu. lead configurations blank= straight radiation hardened screening blank= industrial; h=mil-prf-38534 class h; k=mil-prf-38534 class k general part number msk496 k rh esd triangle indicates pin 1 weight=1.5 grams typical all dimensions are specified in inches 8548-89 rev. i 10/14
ordering information lead configurations g=gull wing radiation hardened screening blank= industrial; h=mil-prf-38534 class h; k=mil-prf-38534 class k general part number msk496 k rh g the above example is a class k screened device with gull wing lead form. for non-rad hard engineering units, order msk496edug. 6 mechanical specifications esd triangle indicates pin 1 weight=1.5 grams typical all dimensions are specified in inches 8548-89 rev. i 10/14
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. m.s. kennedy corp. phone (315) 701-6751 fax (315) 701-6752 www.mskennedy.com 7 revision history 8548-89 rev. i 10/14
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