1 preliminary AMH461 hybrid - high reliability emi filter description features the amh series emi filter has been designed to provide full compliance with the input line reflected ripple current requirement specified by ce03 of mil - std - 461c over the exte nded military temperature range while operating in conjunction with the corresponding ahf series of dc/dc converters. these filters are offered as part of a family of high reliability conversion products providing single, dual and triple output voltages wh ile operating from nominal +28 volt input line. other converters operating with a similar switching frequency will also benefit from use of this device. these emi filters are hermetically packaged in a seam welded enclosure utilizing axially oriented copp er - core pins which minimize resistive dc losses. this package has been configured to complement the ahf package as a convenience in system installation and is fabricated with advanced analog / m - 3's rugged ceramic lead - to - package seal assuring long term h ermetic seal integrity in harsh environments. designed to meet the the stringent requirements of military and aerospace use, these devices are manufactured in a facility fully qualified to mil - prf - 38534, and are available in two screening grades. the ch g rade intended for flight use is fully compliant to the requirements of mil - prf - 38534 for class h. the hb grade is processed and screened to the class h requirement, but does not include element evaluation. the es grade is processed and screened to a lower level requirement. class ch grade and class hb grade are tested to meet the complete group "a" test specification over the full military temperature range with no derating. variations in electrical, mechanical and screen requirements can be accommodated. contact advanced analog / m - 3 for special requirements. n up to 2.0 ampere output current n attenuation > 60db at 500khz n low profile seam welded package n ceramic insulated copper core pins n operation over full military temp range n no derating for ? 55oc to +125 oc typical connection diagram AMH461/ch emi filter ahf28xx/ch (or other) dc/dc converter +vin +vin input return input return +vout +vout output return output return r l r l system bus ahf28xx/ch (or other) dc/dc converter +vout output return +vin input return
2 specifications AMH461 absolute maximum ratings note 1 input voltage - 80v to +80v note 2 input current 3.0 a lead soldering temperature 300c for 10 seconds case temperature operatin g - 55c to +125c storage - 65c to +135c electrical characteristics - 55c t case +125c, - 50 v in +50 unless otherwise specified. parameter group a subgr oups test conditions min nom max unit input voltage steady state transient note 2 - 40 - 50 ? +40 +50 v dc output voltage 1, 2, 3 v out = v in - i in (r dc ) v dc output current note 3 2.0 a dc dc resistance note 4 1 t c = 25c 150 250 m w power dissipation maximum current t c = 25c 1.0 w noise reduction t c = 25c 1khz 200 khz - 500 khz 500 khz ? 10 mhz 10 mhz ? 50 mhz - 1 40 70 60 +1 50 80 70 db isolation 1 any pin to case tested @ 500vdc 100 m w capacitance m easured between any pin and case 44 nf device weight slight variations with case style 30 gms notes to specifications: 1. operation above maximum ratings may cause permanent damage to the device. operation at maximum ratings may degrade performance and affect reliability. 2. device can tolerate 100 volt transient whose duration is 100 ms when r s 3 0.5 w . 3. derate output current linearly from 100% at 125c to 0 at 135c. 4. dc resistance is the total resistance of the device and includes the su m of the input to output resistance and the return in to return out resistance paths.
3 AMH461 block diagram 1 5 3 2 4 AMH461 pin designation pin number designation 1 positive input 2 positive output 3 case ground 4 output common 5 input common AMH461 case outline 1.450 1.900 1.120 .260 0.050 typ 0.331 max 1.000 1.700 0.800 0.920 1 2 3 4 5 ? 0.104 x3 0.200 typ ? 0.06 pins note: flanged case shown. non - flange case identical size but without three mounting ears. tolerances, unless otherwise specified: .xx = 0.010
4 .xxx = 0.005 available screening leve ls and process variations for AMH461 emi filters. requirement mil - std - 883 method /ch suffix /hb suffix /es suffix temperature range - 55c to +125c - 55c to +125c - 55c to +125c element evaluation mil - prf - 38534 ? ? internal visual 2017 yes yes yes temperature cycle 1010 cond c cond c cond b constant acceleration 2001, cond a cond a 500g burn - in interim electrical @ 0 hrs 1015 160 hrs @ 125c 160 hrs @ 125c 96 hrs @ 125c final electrical (group a) read & record data mil - prf - 38534 & specifica tion - 55, +25, +125c - 55, +25, +125c +25c pda (25c, interim to final) 10% 10% ? seal, fine & gross 1014 cond a, c cond a, c cond a, c external visual 2009 yes yes yes
advanced analog / m - 3 the information in this data sheet has been carefully checked and is believed to be accurate; however no responsibility is assumed for possible errors. these specifications are subject to change without notice. 0020 advanced analog / m - 3 inc. l mil - prf - 38534 qualified iso 9001 registered 2270 martin avenue san ta clara ca 95050 - 2781 (408) 988 - 4930 fax (408) 988 - 2702 5 part numbering/ordering information amh 461 f / ch model applicable military test standard screening ch, hb, es see chart for details case style f = flange y = flange w/side pins - = no flange typical filter ce03 performance ahf2805s ce03 performance without AMH461 filter ahf2805s ce03 performance with AMH461 filter
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