introduction fast and easy breadboarding of circuits using the pa62dk is possible with the EK55 evaluation kit. the EK55 includes both the universal eval36 board and the eval55 substrate. the use of eval36 and eval55 allows for a large area of breadboarding space to work with while allowing a surface mount substrate for the pa62dk. the pa62dk ampli?er may be surface mounted directly to the eval55, a thermally conductive but electrically isolated substrate. the pa62dk is soldered to a dut foil footprint area the size of the heatslug as shown in figure 1. the metal substrate is cost effective and can allow the pa62dk to dissipate power up to the datasheet rating. part# description quantity eval36 universal pc board 1 eval55 evaluation substrate, pa62dk 1 tsm-116-01-t-sv terminal strip, 16 pin 2 ssw-116-01-t-s socket strip, 16 pin 2 pce2055ct-nd cap, 47uf, 50v 4 ox7r105kwn cap, 200v, 1uf, ceramic 4 *031606 5v, 10ma, 3.4c/w heatsink with fan, aavid 1 * parts are not supplied. parts are application dependant. suggested part numbers are provided. figure 1 before you get started ? all apex ampli?ers should be handled using esd precau - tion. ? review the apex product datasheet and operating condi - tions. ? always provide the appropriate heat sinking. power dis - sipation must be considered to ensure maximum junction temperature (t j ) is not exceeded. ? always use adequate power supply bypass capacitors, apex recommends at least 10f per amp of output current. ? do not change connections while the circuit is powered ? in case -vs is disconnected before +vs, a diode between -vs and ground is recommended to avoid damage. ? initially set all power supplies to the minimum operating levels allowed in the product datasheet. ? check for oscillations up to and above the unity gain band - width of the ampli?er. assembly the pa62dk is a surface mount device and should be assembled to the eval55 substrate using surface mount processes. solder paste may be dispensed or screen-printed on the dut pads. the heat slug on the back of the pa62dk provides maximum heat dissipation capabilities when soldered to the foil footprint area. the pa62dk should be re?owed to the substrate using a solder re?ow furnace. if this is not available, a heat plate capable of solder re?ow temperatures may be used. once the ampli?er is mounted on the top of the substrate, the heat sink fan or selected heat sink can then be mounted to the back of the substrate. a heat sink is not supplied with the kit, but several options are available through aavid thermal product, inc. high thermal conductive thermal grease should be used when mounting the heat sink fan or heat sink to the evaluation board. review figure 2 on next page for other possible assembly methods to construct this evaluation kit. note: all grounds must be tied together on the eval36 board. ?????????? ?? ?? ?? ?? ??? ?? ?? ?? ?? ?? ?? ??????? ???????? ? ?? ?? ?? ????? ?? ?? ??? ?????? ?????? ?????? ?????? ?????? ?????? ?? ?? ?? ?? ?? ???????? ?? ??? ??? ?? ?? ?????? ?? ?????? ?????? ?? ??? ?????? ?????? ?????? ??? ???????? ??? ??? ?????? ?????? ?????? ?????? ?????? ???????? ?????? ???????? ??? ??? ???????? ?????? ???????? ?????? ?????? ?????? ?????? ?????? ??? ???? ???? ???? ????? ????? ?????? ???????? ????? ?????????? apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 1 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ????????????????????????? ????
figure 2 ?????????? ?? ?? ??? ?? ?? ?? ?? ?? ?? ??????? ???????? ????? ?????? ???? ? ?? ?? ?? ????????? ???? ???? ???? ???? ???? ???? ???? ???? ?????????? ???????? ???????? ?????? ?????? ?????????????? ?????? ?????????????? ??????????????? ????????????? ?????????? apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 2 evaluation kit for pa62dk EK55 this data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. all speci?cations are subject to change without notice. EK55u rev a july 2003 ? 2003 apex microtechnology corp.
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