micropac industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. micropac industries, inc. hybrid microelectronics products division ? 905 e. walnut st., garland, tx 75040 ? (972) 272-3571 ? fax ( 972) 494-2281 www.micropac.com e-mail: hybridsales@micropac.com 12/13/01 1 true hermetically sealed proportiona lly controlled heater hybrids mii hybrid microelectronics products division features: ? self-contained ? programmable via a single external resistor ? available from 40 to 50 watts applications: ? microwave oscillators ? telecommunications ? other areas where temperature control is needed description a self-contained hybrid circuit heater that is programmable via a single external resistor. these systems are ideal for microwave oscillators, telecommunications and other areas where temperature control is needed. heaters are available from 40 to 50 watts. typical electrical characteristics for dc heater (28v dc input, 28 watts (51974)) operating voltage range (see note 13) ???????????????????????????????? 28 1 vc voltage limits ???????????????????????????????????? 24 vdc min, 32 vdc max reverse voltage protection ???????????????????????????????????.???. to 50 v operating current range ??????????????????????????????.????....?. .015 to 1.00 a turn on current ?????????????????? ???????????????????..????? to 1.00 a quiescent current ???? ????????????????? ????????????..????? less than .019 a typical electrical characteristics for ac heaters (115 vac input, 28 watts (52034)) operating voltage range ? ????????????????? ????????.???. 100 to 125 vac, 50 to 400 hz voltage limits ??????????? ??????????????? ????????????...??? 0 to 150 vac operating current, steady state ????????????????????????????????..? .001 to .280 a turn-on current range (at 115 vac) ?????????????????????????????????. to .280 a quiescent current ??????????????????????????????????????? less than 1 ma temperature characteristics control range (see note 1, 2 & 3) ?????????? ?????????????????????. +50c to +100c variation with load (see note 4) ?????????????????????????????????...?.. 10c max variation over operating range (see note 5) ???????????????????????????????? 2c maximum control temperature (see note 6) ???????????? ??????????????????? +120c environmental characteristics operating temperature ???????????????????????????????????.? -55c to +100c altitude ??????????????????????????????????????????...?.. 70,000 ft. max shock ?????????????????????????????????????????????.?. 20 g max vibration ????????????????????????????????????????. 50 g at 2,000 hz max humidity ?????????????????????????????????????????..... greater than 95%
micropac industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. micropac industries, inc. hybrid microelectronics products division ? 905 e. walnut st., garland, tx 75040 ? (972) 272-3571 ? fax ( 972) 494-2281 www.micropac.com e-mail: hybridsales@micropac.com 12/13/01 2 true hermetically sealed propor tionally controlled heater hybrids reliability each hybrid circuit is subjected to the following reliability screening per mil-prf-38534 ? precap internal visual method 2017, condition b ? temperature cycling, method 1010, condition b ? constant acceleration, method 2001, condition b, y axis only ? optional burn-in per mii specifications ? fine and gross leak test, method 1014, conditions a & c ? external visual, method 2009 notes 1. dc heaters (small substrate) use table 1 for control resistor, and figure 1 for dimensions. 2. dc heaters (large substrate) use table 2 for control resistor, and figure 3 for dimensions. 3. ac heaters (large substrate) use table 2 for control resistor, and figure 3 for dimensions. 4. maximum temperature variation for current change from 5% over quiescent to 95% of turn-on current. 5. maximum temperature variation over operating voltage range when ambient temperature is constant and the supply current is between 5% over quiescent and 95% of turn-on current. 6. maximum temperature with any value of control resistor, including 0 ohms. 7. all true hermetically sealed (solder welded) heater modules are leak tested to meet mil-prf-38534, method 1014, test conditions a & c, with a maximum lead rate of 1 x 10 -7 atm-cc/sec, and all hermetically sealed (epoxy) heaters have a maximum leak rate of 1 x 10 -6 atm-cc/sec. 8. optimum heat transfer is obtained by using a thermal joint compound such as dow corning 340 on the mounting surface. 9. operation is possible over +100c, but electrical perfo rmance is not guaranteed. input current decays to 20ma max at +120c without damage to the heater module. 10. all mii dc heaters are protected against reverse voltage up to 50 v. 11. the standard ceramic heater design has pins for interconnect. the standard micropac part number with or without the a suffix will have pins & micropac can supply the heater without pins and with pad metalization designed for wire bonding. the version without pins will have a b suffix to the standard micropac part number. 12. maximum power rating for control resistor is 1/8 watts. precise resistor values should be determined by measuring the surface temperature. 13. the heater is operational from 24 to 32 vdc, however for optimum performance 28 vdc is recommended.
micropac industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. micropac industries, inc. hybrid microelectronics products division ? 905 e. walnut st., garland, tx 75040 ? (972) 272-3571 ? fax ( 972) 494-2281 www.micropac.com e-mail: hybridsales@micropac.com 12/13/01 3 true hermetically sealed propor tionally controlled heater hybrids d.c. true hermetic seal 51974 28v / 28w 52005 20.5v / 15w 52027 28v / 40w 52086 18v / 15w 52087 28v / 15w 52088 32v / 30w d. c. hermetic seal 51933 28v / 28w 51948 20v / 4w 51949 28v / 21w 51951 20v / 20w 51952 28v / 40w 51960 15v / 20w 51961 24v / 8w 51966 30v / 6w 51969 15v / 4w 51970 15v / 7.5w 51971 15v / 20w 51985 20.5v / 15w 52012 40v / 40w 52013 28v / 11w 52029 15v / 15w 52041 15v / 28w 52066 28v / 15w d. c. hermetic seal (large substrate) 52048 52055 20v / 40w 28v / 50w d. c. true hermetic seal (large substrate) 52056 52070 28v /50w 28v / 40w a. c. hermetic seal 52031 52057 115v / 28w 115v / 40w a. c. true hermetic seal 52034 115v / 28w pin no. function 1 + voltage 2 - voltage (return voltage) 3 control 4 control
micropac industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. micropac industries, inc. hybrid microelectronics products division ? 905 e. walnut st., garland, tx 75040 ? (972) 272-3571 ? fax ( 972) 494-2281 www.micropac.com e-mail: hybridsales@micropac.com 12/13/01 4 true hermetically sealed proportionally controlled heater hybrids
micropac industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. micropac industries, inc. hybrid microelectronics products division ? 905 e. walnut st., garland, tx 75040 ? (972) 272-3571 ? fax ( 972) 494-2281 www.micropac.com e-mail: hybridsales@micropac.com 12/13/01 5 true hermetically sealed propor tionally controlled heater hybrids proportionally controlled micro dc heater hybrid micropac industries, inc., a supplier of state of the art integrat ed hybrid circuits, introduces a new micro d heater offering a low cost alternative to standard heaters, as a temperature stabilization method for a variety of applications including saw filters, vcos and yig osc illators. these heaters are programmable via a single external resistor. dimensions are .200 by .200 (fig. 1) to 1.4 by .5 inches (fig. 2). power ratings are from 1.5 watts to 28 watts. for more information on custom heater hybrids, please contract your local mii representative or call mii directly. electrical characteristics 52250-2 fig. 1 52228-B fig. 2 operating voltage 15.0 24.0 vdc voltage limits 13.0 17.0 22.0 28.0 vdc min. vdc max. pin function operating current 10 to 100 15 to 200 ma 1 +vdc turn on current to 100 to 200 ma 2 -vdc isolation (pin to backside) 1000 1000 vdc 3 control power dissipation 1.5 4.8 watts 4 control vcc .200 .200 gnd resistor control .110 sq. (4 places) .865 max. .510 max. .175 +.015 .165 max. - 1.40 max. .025 nom. fig. 1 fig. 2
micropac industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. micropac industries, inc. hybrid microelectronics products division ? 905 e. walnut st., garland, tx 75040 ? (972) 272-3571 ? fax ( 972) 494-2281 www.micropac.com e-mail: hybridsales@micropac.com 12/13/01 6 true hermetically sealed propor tionally controlled heater hybrids temperature characteristics control range (table 1) +50 to +100 +50 to +100 c variation with load 10 10 c variation over operating range 2 2 c maximum control temperature +100 +100 c operating temperature -55 to +100 -55 to +100 c temperature characteristic curve temperature ? degrees c table 1 (typical)
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