Masekeli othandizira kuti adyetse sensa amaphatikizidwa, ndipo muyeso ndi wofanana - magawo awiri omwe amapindulitsidwira opindulitsa amatha kukhala ndi masensa kuyambira 1mV / V mpaka 500mV / V (500Ω mpaka 60kΩ).
Gwero lamakono la pa-chip limaperekanso masensa kuphatikiza Pt100 kukana kwa platinamu ndi ma di-thermometer amtundu wa diode kuti awerengedwe, ndipo sensa yotentha ya-chip imaphatikizidwanso.
Zotsatira zitha kukhala kudzera mu SPI (10MHz), ine2C (yokhazikika, yachangu komanso yothamanga kwambiri) kapena i2Mtundu wa waya wa 100kHz wopangidwa ndi C wotchedwa 'OWI' wolemba Renesas.
Zambiri za OWI zitha kutumizidwa kudzera pa 4mA mpaka 20mA-loop yomwe ikuyenda kulikonse pakati pa 7V ndi 48V pogwiritsa ntchito npn modulation transistor. Pogwira ntchito ndi JFT yakunja, oyendetsa mkati amaperekedwa kuti atenge njanji yamagetsi ya 5V ya chip kuchokera pachingwe chomwe chilipo.
Palinso kutulutsa kwa analogue - komwe sikunachokere mwachindunji kuchisonyezo cholowetsera, koma kuchokera ku digito ya purosesa yokonzanso yomwe idapangidwanso kudzera mu 16bit ADC. Mtheradi (0 -10V) ndi voliyumu yama voliyumu, yolumikizana ndi pano, kapena zosokoneza zotsatira za analogue zimathandizidwa.
Chip ntchito ili mu imodzi mwanjira zitatu zoyambira
Mawonekedwe ogona amalimbikitsidwa kwa masensa okhala ndi digito yokha. Dziko lopanda kanthu limangolowetsedwa pambuyo poti lamulo ligwiritsidwe ntchito pazomwe zilipo pakadali pano, pomwe mawonekedwewo amangomvera kuti amalandire malamulo.
Imadzuka pambuyo polandila lamulo lovomerezeka, ikwaniritsa, imapereka zotsatira ku mawonekedwe a digito, ndikubwerera kuntchito pambuyo poti deta yatenga. Kutenga deta mobwerezabwereza sikuchirikizidwa, komanso kulumikizidwa ndi analogue sikungachitike.
Njira yoyang'anira ndiyofunikira kwambiri pakuwunika, kuyesa, ndikuwunika. Malamulo onse amapezeka, zotulutsa zonse za digito ndi analog zimathandizidwa, ndipo ntchito zonse zimapezeka. Zomwe zimapangidwanso komanso kulumikizana kwa digito zilipo.
Mawonekedwe a cyclic ndi odziyimira pawokha, okhala ndimiyeso yama sensa mobwerezabwereza ndikusinthidwa kukhala zosintha zotulutsa (digito kapena analogue kapena zonse ziwiri). Njirayi imalimbikitsidwa ndi ntchito zotulutsa analogue. Mulingo woyeserera (chifukwa chake kuchuluka kwa zosintha) ndiwosinthika.
Kugwiritsa ntchito kwapitirira 2.7V mpaka 5.5V (7V mpaka 48V ndi JFET yakunja) ndi -40 ° C mpaka 125 ° C.
Kuyika ndi kofera kapena 4 x 4mm QFN yokhala ndi mbali zotota kuti muziyang'ananso.
Mapulogalamuwa akuwonetseratu pakukakamira, kuyenda, ndi kuzindikira kwa msinkhu, makina osinthira, mafakitale, zinthu zoyera, zowongolera mpweya, masikelo, kuyeza kuthamanga kwa magazi ndi owunikira zaumoyo
Tsamba lazogulitsa lili pano