Multisim中LM386芯片的构建步骤.docx
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Multisim中LM386芯片的构建步骤.docx
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Multisim中LM386芯片的构建步骤
Multisim中LM386芯片的构建步骤
TheLM386isalowvoltageaudiopoweramplifierintegratedcircuit(IC)・TobeabletosimulatethecomponentinMultisimanduseitinUltiboardPCBdesigns,itneedstobecreatedusingtheComponentWizardinMultisim.Filesneeded:
Symbolfile(LM386・sym)andSPICEmodel(LM386.cir).
StartMultisim.Under"Tools",choose''ComponentWizard"・
Step1:
Entercomponentinformation.
Step2:
Enterfootprintinformation.
Clickon"Selectafootprint".
Therearesome5000footprintsintheMasterDatabase・Tofindtheonethatweneedmoreeasily,clickon"Filter〃・Clickon"Addrow"andselect"Footprint"fromthedropdownmenuunder"Column"・Setthe"Operator"to"Contains"andenter"DIP8"under"Value"asshownbelow.
Selectthez,UltiboardDIPS'"footprint.
Clickon"Select"・Inthefootprintinformationwindowsetthe
numberofpinsto8.
Step3:
Entersymbolinformation.
ComponentWizard-Step3of8
Symbolset
®AN5I
Odidi
Entersymbolinformation
1Edit
Copy
Codyto…J
VBxkJ|Ncp;t7|]CodT][Help
Clickon"Edit"toopentheSymbolEditor.
ogj-B*a§?
*口\0。
疋言)riA厨炉
HNMM0应底UMUKLKshYy二二二^-IA4A14S6?
8
>r>tM
SR机如协
CmwIWi
Cpjiyik*
Cw»y*
ReWr
饰A
F
叶
1Msi6
DownloadthefileLM386・symandrememberthelocationwhereyouputit.IntheSymbolEditorclickon"File"and"Open.・・"andopenthe
LM386.symfile.
曲fta
td
MH
hY应巾Ort-*UKM3YUKFa'Z7LfttH豪YUrHm—业”
的-*UrF«常、-*Lfl-M
Sr机Cun杯M加
Ca«y加SrECm»枷皿如
)'♦xZ'【啊*
:
o并丫•:
弧七彩込绅
thebottom
Donotchangeanyofthepininformationthatappearsofthesymboleditor・Clickon"Exit"andanswer"Yes"tothe"Savechanges?
"question.Nowthesymbolinformationwindowshouldlooklikethis:
Entersymbolinformation
Symbolset
®AN5I
Odicj
IEdit
CopyfromDB
fCopYto...|
VBxkJ|Next7|]ConT][Help
Step4:
Setpinparameters・Clickon"\ext"andchangethepin
Typesforthedifferentpins(from"BIDIRECTIONAL")tothevaluesshownbelow.
Step5:
Setmappinginformationbetweensymbolandlayoutfootprint.
Click"Next"andfillinthefootprintpinsinasshownnext.
Step6:
SelectSimulationmode1.Click"\ext"toobtainthe"Selectsimulationmodel"window.
DownloadthefileLM386・cirandrememberthelocationwhereyouputit.Thenclickon"Loadfromfile"andopentheLM386・cirfile・YoushouldseeawindowwiththeLM386SPICEmodelfilledinasshownbelow.
q1
gnd
inn
10011
ddpnr
rl
inn
gnd
50k
口2
gnd
inn
10012
ddpnp
r2
inp
gnd
50k
5etectsimdatonmodel
SelectfromDB
Copyto.・・
Modelname:
LM386
Loadfromfife
Modelmaker
Modeldata;
*CONNECTIONS:
Goin1
8
*differentialinputstage,gain—setting
*resistor®zandintexna.1ieedback3?
esistor:
Next> Corucd[Help| Step7: Mappinginformationbetweensymbolandsimulationmode1. Click"Next"andfillintheModelnodesinthePinmappingtableasfollows・(Note: Themodelnodesarenumbered1,2,3,・・・fromlefttorightinthe・SUBCKTspecification,irrespectiveofthepinnumbersinthefootprintmapping・) 5etm^DDiroinforrratbnbetv^eeisymbdandsimulationmcdd(Thes/rrbolmustcontanatfeastasmsypinsasthemodelhasconnecticnpoints.) Pinmoppingtcbb; Symbdpns Modelnodes Vs 6 Gan] 1 Gein8 8 VOJt-IN 5 2 十IN 3 Grd 4 Bypass 7 二叵冈 Faml/tree: Sojrce? UserCdcbwc CMOS TTL i-i Anabo ,w8版 咄Oodcs Oditj Step8: Savecomponenttodatabase・ClickNextandinthenextwindowclickon"UserDatabase''andselect,zAnalog"・ 乐ComponentWizard-Step8ofB A^enradj^ncherals “X]Iw[On: ®|] Clickon"Addfamily"andenter"Amplifier"forthefamilyname. Finally,click"Finish"andyouaredonewithLM386componentcreation.CheckthatyoucanselectthecomponentinMultisim. Thenplacethecomponentonaschematic. g)6f紳Eg少"林I«fc”gg-別』0j 可R&Q®口PEBS=®E・I3;: : “•・三込兰二*>? E2l ▼: K28<0初[人J»“■•.•'台三[ 兰空l^x【勺兰聖 赴咧】・厂 11L1 mw*7如,;is加彩曲申
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