apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 1 introduction fast, easy breadboarding of circuits using the pa240cx are possible with the EK34 pc board. mounting holes are provided and the provision for standard banana jacks simpli?es connec - tion and testing. the ampli?er may be mounted horizontally or vertically. components are labeled on both sides of the board for ease in probing. a multitude of circuit con?gurations are possible, so only sev - eral component locations have speci?c functions and will usually be necessary. this kit is not suitable for use with pa240cc. parts list part # description quantity eval 34 evaluation board pa40/140cx 1 clamp04 clamp for hs29 2 ms11 pin receptacle, 30 pin strip 1 tw14 thermal washer to220 10/pack 1 hs29 heat sink, 2.7 deg/w 1 equivalent schematic typical component functions component function c1,7 alone is a roll off, with r3, 13 is a current out stability network (ref. an19) c2,6 with r6, 15 forms noise gain compensation network (ref. an25) c3,4 supply bypass, .22 to 1f ceramic c5,8 with r9, 20 forms a howland stability network, can jumper both to ground +in cc sets compensation to match desired gain cs normally not used. d1-4 flyback protection diodes r1,11 inverting inputs, install to input line or to ground r2,12 negative feedback, install to v for voltage out or to i for current output (ref. an19) r3,13 with c1, 7 forms a stability network for current output (ref. an19) r4,14 current sense for current outputs (ref. an13) r5,15 with c2, 6 forms noise gain compensation network (ref. an25) r6,17 input r for howland current pump or differential, usually shorted for non-inverting r7,19 current sense for howland current pump. could also be used to isolate large cloads (ref. an25) r8,21 positive feedback, install to h for a howland current pump, to d for a differential circuit r9,20 with c5, 8 forms a howland stability net work, can jumper both to ground +in r10 with an equal value r12 pro - vides gain = -1 for a bridge slave (ref. an3,20) r18,19 can provide mid-supply refer - ence for single supply bridge (ref. an3, 20) rc normally shorted. rs normally not used. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?????????????????????????? ???? ?? ???? ???? ???? ?? ??? ???? ????? ??? ??? ??? ???? ?? ??? ??? ??? ??? ?? ?? ?? ??? ? ? ? ? ? ? ? ???????? ??? ??? ??? ??? ??? ?? ?? ?? ?? ??? ??? ??? ?? ?? ??? ??? ??? ???? ??? ????? ??? ??? ? ? ? ? ? ? ? ???????? ?? ??? ??? ??? ?? ?? ?? ?? ??? ?? ?? ?? ??? ??? ??? ??? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ? ? ? ? ? ? ? ? ??????????
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 2 EK34 evaluation kit for pa240cx pin-out 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. EK34u rev e june 2005 ? 2005 apex microtechnology corp. figure 1. eval34 top eval34 bottom ???? ???? ??????? ???? ???????????????? ??????????????????????????? ???? ?? ?? ??? ?? ???? ??? ?? ?? ?? ?? ?? ?? ?? ??? ?? ??? ??? ?? ??? ?? ??? ?? ?? ?? ???? ???? ?? ??? ?? ???? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ??? ??? ??? ??? ??? ??? ?? ?? ??? ????? ???? ?? ??? ??? ???????? ????? ???????? ? ? ? ? ? ? ? ? ? ??? ?????? ??????????????? ??? ?????????????? ???
|
