ADM 1485 JR

ADM1485JR RS-485 transceiver yog ib qho kev ua tau zoo tshaj plaws uas ua tau raws li EIA RS-485 tus qauv, muab 30 Mbps cov ntaub ntawv tus nqi, ib qho 5 V muab, thiab ntau hom tsheb npav dav dav. Nrog nws cov kev siv hluav taws xob tsawg, kev kaw hluav taws xob thiab kev tiv thaiv luv luv, kev nthuav tawm qeeb qeeb, thiab cov khoom siv siab-Z thaum lub zog tawm, nws ua haujlwm ntau yam thiab txhim khu kev qha rau ntau yam kev siv. Los ntawm qis zog RS-485 systems mus rau DTE-DCE interfaces, pob ntawv hloov pauv, hauv cheeb tsam network, cov ntaub ntawv concentration, cov ntaub ntawv multiplexers, thiab ISDN, ADM1485JR ua tau zoo hauv kev txuas cov ntaub ntawv sib txawv hauv cov ntaub ntawv kev sib txuas lus niaj hnub no.

· Tsawg Fais Fab RS -485 Systems

· DTE-DCE interface

· Pob ntawv hloov

· Local Area Networks

· Cov ntaub ntawv Concentration

· Data Multiplexers

· Integrated Services Digital Network (ISDN)

ADM1485 yog cov kab sib txawv transceiver haum rau kev kub ceev bidirectional cov ntaub ntawv kev sib txuas lus ntawm multipoint tsheb npav kis kab. Nws yog tsim los rau cov ntaub ntawv sib npaug thiab ua raws li RS-485 thiab RS-422 EIA Standards. Ib feem muaj tus tsav tsheb sib txawv thiab tus txais kab sib txawv. Ob tus neeg tsav tsheb thiab lub receiver tuaj yeem qhib nws tus kheej. Thaum ua tsis taus, cov zis yog peb teev.

ADM1485 ua haujlwm los ntawm ib qho 5 V fais fab mov. Lub zog ntau dhau los ntawm kev sib cav hauv tsheb npav lossis los ntawm kev tso tawm luv luv yog tiv thaiv los ntawm thermal shutdown circuit. Cov yam ntxwv no ua rau tus neeg tsav tsheb tso tawm rau hauv lub xeev siab impedance yog tias, thaum lub sijhawm ua haujlwm tsis raug, kuaj pom qhov ntsuas kub tseem ceeb hauv cov tsav tsheb sab hauv.

Txog li 32 lub transceivers tuaj yeem txuas ib txhij ntawm lub npav, tab sis tsuas yog ib tus neeg tsav tsheb yuav tsum tau qhib txhua lub sijhawm. Nws yog ib qho tseem ceeb, yog li ntawd, cov neeg tsav tsheb xiam oob qhab uas tseem tsis tau thauj lub tsheb npav. Txhawm rau kom ntseeg tau qhov no, tus tsav tsheb ADM1485 nta cov zis siab impedance thaum muaj kev xiam oob qhab thiab thaum lub zog poob.

Qhov no txo ​​cov nyhuv loading thaum lub transceiver tsis siv. Lub siab impedance tsav tsheb tso zis yog khaws cia tshaj tag nrho cov hom-voltage ntau yam ntawm -7 V rau +12 V.

Lub receiver muaj qhov ua tsis tau zoo uas ua rau muaj qhov ua tau zoo ntawm lub xeev cov zis yog tias cov inputs tsis sib txuas (floating).

ADM1485 yog tsim los ntawm BiCMOS, ib qho kev sib xyaw ua ke ntawm cov txheej txheem thev naus laus zis ua ke nrog lub zog qis CMOS nrog kev hloov pauv sai ntawm kev siv tshuab bipolar. Tag nrho cov inputs thiab outputs muaj kev tiv thaiv ESD; tag nrho cov tsav tsheb tso zis muaj qhov chaw siab thiab lub dab dej tam sim no muaj peev xwm. Ib txheej epitaxial yog siv los tiv thaiv latch-up.

ADM1485 nta kev hloov pauv ceev heev. Cov neeg tsav tsheb tsawg tshaj plaws kev nthuav tawm qeeb tso cai sib kis ntawm cov ntaub ntawv raug tus nqi ntawm 30 Mbps thaum qis qis txo qis EMI cuam tshuam.

Ib feem yog tag nrho teev nyob rau hauv kev lag luam thiab kev lag luam kub ntau yam thiab muaj nyob rau hauv PDIP, SOIC, thiab me me MSOP tej pob khoom.

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