Kugunda kwa mtima ndi sensa ya oksijeni ili ndi ma LED ndi ma algorithms, mu <1mm makulidwe

Komabe, imagwira ntchito kunja: ma LED anayi, multiplexer ndi accelerometer chip.

"MAXM86146 imagwiritsa ntchito deta ya accelerometer kuti ibwezeretse zinthu zoyenda nthawi ndi nthawi ndipo imakonzedweratu pazizindikiro ziwiri zobiriwira zobiriwira nthawi imodzi," inatero kampaniyo. "Zizindikiro ziwiri zobiriwira izi zitha kuchitika ndi ma photodiode awiri ndi LED imodzi kapena photodiode imodzi ndi ma LED awiri. Kukhathamiritsa kwa oxygen kumafunikira kugwiritsa ntchito mawonekedwe awiri amitundumitundu a LED, omwe ndi ofiira ndi IR. Ayenera kugawana zithunzi zomwezo komanso mtunda wopatukana. ”

Gawoli limakhala ndi MAX86141 njira ziwiri zamankhwala zamankhwala zam'mbuyo zam'manja kuphatikiza MAX32664C MCU ndi awiri a 3.8mm²Zithunzi za PIN.

Pamapeto omaliza, mapasa a 19bit ADC amawerenga ma photodiode ndipo, ngakhale ma LED ali akunja, kuli ma driver atatu a LED (amafunikira njanji yawo). Ma multiplexer akunja amafunikira ma LED ngati ntchito zonse zingachitike.

Zofunikira zamagetsi pamtunduwu ndizowonjezera 1.8V (kuphatikiza magetsi), ndipo gawolo limandithandizira²C kulumikizana ndi womenyera wolandila. "Ma algorithms ophatikizika amasintha mawonekedwe a analogue kutsogolo-kumapeto kuti akweze siginecha mpaka phokoso ndikuchepetsa kugwiritsidwa ntchito kwamagetsi kutengera mtundu wamagwiridwe" - yomalizirayi idachitidwa ndi imodzi mwama algorithms.

Pa 25 sampuli / s, kumapeto kwenikweni kumafunikira 10μA.

Chida chowunikira (MAXM86146EVSYS #) chilipo.

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