Chithunzi cha AD7760BSVZ IC ADC24BIT SIGMA-DELTA 64TQFP

Kufotokozera

AD7760 ndikuchita bwino kwambiri, 24-bit Σ-Δ analog-to-digital converter (ADC).Imaphatikiza bandiwifi yolowera komanso kuthamanga kwambiri ndi mapindu a kutembenuka kwa Σ-Δ kuti akwaniritse magwiridwe antchito a 100 dB SNR pa 2.5 MSPS, ndikupangitsa kuti ikhale yabwino yopezera data mwachangu.Wide zosinthika zosiyanasiyana kuphatikiza kwambiri kuchepetsa zofunika antialiasing amachepetsa kamangidwe.Chotchinga chophatikizika choyendetsera zolozera, chokulitsa chosiyana cha kusungitsa ma siginecha ndi kusuntha kwamlingo, mbendera yokulirapo, zolembetsa zamkati ndi zosinthira, ndi fyuluta yotsika ya digito ya FIR imapangitsa AD7760 kukhala chipangizo chophatikizika, chophatikizika kwambiri chopezera deta chomwe chimafuna zotumphukira zochepa. kusankha chigawo.Kuphatikiza apo, chipangizochi chimapereka mitengo yosinthika yosinthika, ndipo fyuluta ya digito ya FIR imatha kusinthidwa ngati mawonekedwe osakhazikika sali oyenera kugwiritsa ntchito.AD7760 ndiyabwino pamapulogalamu omwe amafunikira SNR yayikulu popanda mawonekedwe ovuta akutsogolo akutsogolo.Kuyika kosiyanako kumayesedwa mpaka 40 MSPS ndi modulator ya analogi.Kutulutsa kwa modulator kumakonzedwa ndi zosefera zingapo za lowpass, ndi fyuluta yomaliza yokhala ndi ma coefficients okhazikika kapena osavuta kugwiritsa ntchito.Mulingo wachitsanzo, ma frequency akona a fyuluta, ndi kuchuluka kwa mawu amayikidwa ndi kuphatikiza kwa ma frequency a wotchi yakunja ndi zolembera zosinthira za AD7760.Mphamvu yamagetsi yoperekedwa ku AD7760 imatsimikizira kuchuluka kwa ma analogi.Pogwiritsa ntchito ndondomeko ya 4 V, chiwerengero cha analoji cholowera ndi ± 3.2 V chosiyana chosiyana ndi njira yodziwika bwino ya 2 V. Kukondera kofanana kumeneku kungathe kupezedwa pogwiritsa ntchito makina osakanikirana a pa-chip, kumachepetsanso zofunikira zowonetsera zizindikiro zakunja.AD7760 imapezeka papalasi yowonekera, TQFP yotsogolera 64 ndipo imatchulidwa pa kutentha kwa mafakitale kuyambira −40°C mpaka +85°C.