I-LMV324IDR Isiqeshana esisha sangempela se-SOP14 Chip 4 seshaneli esikhipha amandla kagesi aphansi we-amplifier edidiyelwe izingxenye ze-IC

Ngokusho kwemingcele ye-amplifiers edidiyelwe yokusebenza, ingahlukaniswa ngezigaba ezilandelayo.
1, inhloso-jikelele: iamplifier yokusebenza yenhloso ejwayelekile yakhelwe izinjongo ezijwayelekile.Isici esiyinhloko salolu hlobo lwedivayisi yinani eliphansi, inani elikhulu lemikhiqizo, futhi izinkomba zayo zokusebenza zingafaneleka ukusetshenziswa okujwayelekile.Isibonelo μA741 (i-op-amp eyodwa), LM358 (i-dual op-amp), LM324 (ama-op-amps amane), kanye neshubhu le-field-effect njengoba isigaba sokufaka se-LF356 zinjalo.Njengamanje zingama-amplifiers asebenzayo ahlanganisiwe asetshenziswa kakhulu.

2, Uhlobo Oluphezulu Lokumelana
Lolu hlobo lwe-amplifier yokusebenza edidiyelwe lubonakala ngokubambezeleka kokufaka kwemodi ehlukile ephezulu kakhulu kanye nokubakhona okuncane kakhulu kokuchema, ngokuvamile kususe>1GΩ~1TΩ, nge-IB yama-picoamp ambalwa kuya kumashumi ama-picoamp.Isilinganiso esiyinhloko sokufinyelela lezi zinhloso ukusebenzisa izici zokuthikamezeka kokufaka okuphezulu kwama-FET ukuze kwakhe isigaba sokufaka esihlukile se-op-amp.Nge-FET njengesiteji sokufaka, akugcini nje ngokuba ne-impedance ephezulu, ukuchema okuphansi okokufaka, kanye nezinzuzo zesivinini esikhulu, i-broadband, nomsindo ophansi, kodwa i-voltage yokukhipha okokufaka inkulu.Amadivayisi ajwayelekile ahlanganisiwe yi-LF355, LF347 (ama-op-amps amane), kanye ne-impedance ephezulu yokufaka i-CA3130, CA3140, njll. [2]

I-3, uhlobo lwe-drift yezinga lokushisa eliphansi
Kumathuluzi anembayo, ukutholwa kwesignali ebuthakathaka, namanye amathuluzi okulawula okuzenzakalelayo, kuhlala kufiswa ukuthi i-voltage yokukhipha i-op-amp kufanele ibe mancane futhi ingashintshi nezinga lokushisa.Ama-amplifiers okusebenza ama-drifts aphansi aklanyelwe le njongo.I-OP07, OP27, AD508, kanye ne-ICL7650, idivayisi ye-chopper-stabilized low-drift ehlanganisa ama-MOSFET, ezinye zezikhulisi ezisebenza ngokunemba okuphezulu, ezisezingeni eliphansi ezikhukhulekayo ezisetshenziswa kakhulu namuhla.

4, High-speed uhlobo
Kuziguquli ezisheshayo ze-A/D kanye ne-D/A kanye nama-amplifiers wevidiyo, izinga lokuguqulwa kwe-SR ye-op-amp ehlanganisiwe kufanele ibe phezulu futhi umkhawulokudonsa wokuzuza ubunye i-BWG kufanele ibe nkulu ngokwanele njengama-op-amps ahlanganisiwe enhloso evamile awafaneleki izinhlelo zokusebenza zejubane eliphezulu.I-high-speed op-amps ibonakala kakhulu ngamazinga aphezulu okuguqulwa kanye nokuphendula okuvama okubanzi.Ama-op-amps ajwayelekile yi-LM318, μA715, njll., okuthi SR=50~70V/us, BWG>20MHz.

5,Uhlobo lokusebenzisa amandla aphansi.
Njengenzuzo enkulu yesekethe ye-elekthronikhi, ukuhlanganisa ukwenza amasekhethi ayinkimbinkimbi abe mancane futhi angasindi, ngakho-ke ngokunwetshwa kohla lwezinhlelo zokusebenza zamathuluzi aphathekayo, kuyadingeka ukusebenzisa ukunikezwa kwamandla kagesi okuphakelayo okuphansi, ukusetshenziswa kwamandla okuphansi kwesigaba se-amplifier esisebenzayo.Ama-amplifiers okusebenza asetshenziswa kakhulu yi-TL-022C, TL-060C, njll., voltage yayo yokusebenza ingu-±2V~±18V, kanti ukusetshenziswa kwamanje kungu-50~250μA.Eminye imikhiqizo isifinyelele izinga le-μW, isibonelo, amandla e-ICL7600 angu-1.5V, futhi ukusetshenziswa kwamandla kungu-10mW, okunganikwa amandla ibhethri elilodwa.

6, I-voltage ephezulu nezinhlobo zamandla aphezulu
I-voltage ephumayo yama-amplifiers okusebenza inqunyelwe ngokuyinhloko ukunikezwa kwamandla.Kuma-amplifiers okusebenza ajwayelekile, i-voltage ephezulu yokuphumayo ivamise ukuba amashumi ambalwa nje ama-volts kanti amandla akhona angamashumi ambalwa nje ama-milliamp.Ukwandisa i-voltage ephumayo noma ukwandisa amandla okukhiphayo, i-op-amp ehlanganisiwe kufanele yengezwe ngaphandle yisekethe eyisizayo.I-voltage ephezulu kanye nama-op amps ahlanganisiwe aphezulu angakhipha amandla kagesi aphezulu kanye namandla aphezulu ngaphandle kokujikeleza okwengeziwe.Isibonelo, i-op-amp ehlanganisiwe ye-D41 inganikezela ngama-voltage afika ku-±150V futhi i-μA791 i-op-amp ehlanganisiwe ingaletha amaza okukhiphayo afika ku-1A.

7,Uhlobo lokulawula oluhlelekayo
Enqubeni yokwenza izinsimbi, kunenkinga yobubanzi.Ukuze uthole ukukhishwa kwe-voltage engaguquki, kuyadingeka ukushintsha ukukhuliswa kwe-amplifier yokusebenza.Isibonelo, i-amplifier yokusebenza inokukhulisa izikhathi eziyi-10, lapho isignali yokufaka ingu-1mv, i-voltage ephumayo ingu-10mv, lapho i-voltage yokufaka ingu-0.1mv, okukhiphayo kungu-1mv kuphela, ukuze uthole i-10mv, ukukhuliswa kufanele kube ishintshelwe ku-100. Isibonelo, i-PGA103A, ngokulawula izinga lephinikhodi 1,2 ukuze ushintshe ukukhulisa.