{"id":42026,"date":"2020-10-26T06:31:44","date_gmt":"2020-10-26T06:31:44","guid":{"rendered":"https:\/\/\/convertisseur-analogique-numerique-sans-filtre-antirepliement\/"},"modified":"2020-10-26T06:31:44","modified_gmt":"2020-10-26T06:31:44","slug":"convertisseur-analogique-numerique-sans-filtre-antirepliement","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/convertisseur-analogique-numerique-sans-filtre-antirepliement\/","title":{"rendered":"Convertisseur analogique\/num\u00e9rique sans filtre antirepliement"},"content":{"rendered":"

De mani\u00e8re g\u00e9n\u00e9rale, la conception d’une cha\u00eene d’acquisition de donn\u00e9es de haute pr\u00e9cision est une activit\u00e9 chronophage, dans la mesure o\u00f9 les concepteurs doivent parvenir \u00e0 un \u00e9quilibre optimum entre les exigences de filtrage antirepliement, les tol\u00e9rances des composants passifs, les erreurs de phase et de gain, ainsi que les modalit\u00e9s d’attaque du convertisseur analogique\/num\u00e9rique \u00e0 des vitesses \u00e9lev\u00e9es. C’est pourquoi le convertisseur AD7134 b\u00e9n\u00e9ficie d’une nouvelle architecture de conversion analogique\/num\u00e9rique de pr\u00e9cision qui modifie en profondeur le processus de conception. Ce nouveau composant \u00e9limine l’utilisation d’un filtre antirepliement, tandis que son entr\u00e9e r\u00e9sistive simplifie consid\u00e9rablement l’attaque du convertisseur analogique\/num\u00e9rique.<\/p>\n

L’AD7134 est un convertisseur analogique\/num\u00e9rique haute pr\u00e9cision 24 bits \u00e0 quatre voies dont la fr\u00e9quence d’\u00e9chantillonnage en sortie est comprise entre 10 \u00e9chantillons par seconde et 1,5 M\u00e9ch\/s. La fonction d’antirepliement inh\u00e9rente jusqu’\u00e0 102 dB \u00e9vite de recourir \u00e0 un filtre externe, ce qui permet d’\u00e9conomiser quelques 60 composants passifs et 5 composants actifs. En outre, l’espace occup\u00e9 sur la carte \u00e9lectronique est inf\u00e9rieur de 70 % \u00e0 une configurationclassique. Ce convertisseur de fr\u00e9quence d’\u00e9chantillonnage asynchrone (ASRC) simplifie la synchronisation entre plusieurs composants, ce qui permet aux utilisateurs de disposer facilement d’un syst\u00e8me d’\u00e9chantillonnage homog\u00e8ne tout en simplifiant les conditions d’isolation.<\/p>\n

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 <\/p>\n","protected":false},"excerpt":{"rendered":"

Analog Devices, Inc, annonce sous la r\u00e9f\u00e9rence AD7134 un convertisseur analogique\/num\u00e9rique sans filtre antirepliement qui permet de simplifier de fa\u00e7on significative la conception de circuits frontaux et d’acc\u00e9l\u00e9rer la mise sur le march\u00e9 d’applications de pr\u00e9cision du continu \u00e0 350 kHz. <\/p>\n","protected":false},"author":9,"featured_media":42027,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[881],"tags":[],"domains":[47],"ppma_author":[1141],"class_list":["post-42026","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"Convertisseur analogique\/num\u00e9rique sans filtre antirepliement ...<\/title>\n<meta name=\"description\" content=\"Analog Devices, Inc, annonce sous la r\u00e9f\u00e9rence AD7134 un convertisseur 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