{"id":227210,"date":"2013-05-30T22:00:00","date_gmt":"2013-05-30T22:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/can-sar-20-bits-sans-latence-1mech-s-inl-de-05-ppm\/"},"modified":"2013-05-30T22:00:00","modified_gmt":"2013-05-30T22:00:00","slug":"can-sar-20-bits-sans-latence-1mech-s-inl-de-05-ppm","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/can-sar-20-bits-sans-latence-1mech-s-inl-de-05-ppm\/","title":{"rendered":"CAN SAR 20 bits sans latence, 1M\u00e9ch\/s, INL de 0,5 ppm"},"content":{"rendered":"<p>L&rsquo;INL de 0,5 ppm de ce convertisseur permet la r&eacute;alisation d&rsquo;une nouvelle g&eacute;n&eacute;ration de syst&egrave;mes avec une pr&eacute;cision vraie de 20 bits. L&rsquo;architecture propri&eacute;taire conduit &agrave; une INL extr&ecirc;mement stable de 2 ppm maxi et &agrave; une THD de -114 dB maxi sur toute la gamme de temp&eacute;ratures de fonctionnement du composant allant de -40 &deg;C &agrave; 85 &deg;C.<br \/>\nCe CAN de 1 M&eacute;ch.\/s, sans &eacute;tat de latence, r&eacute;alise un excellent rapport signal sur bruit (SNR) de 104 dB. La large gamme dynamique et la r&eacute;solution vraie de 20 bits permettent de r&eacute;duire ou de se passer de la n&eacute;cessit&eacute; d&rsquo;un &eacute;tage de gain suppl&eacute;mentaire dans la cha&icirc;ne du signal, ce qui contribue &agrave; l&rsquo;am&eacute;lioration de la pr&eacute;cision et du niveau de bruit de tout le syst&egrave;me. La vitesse de conversion &eacute;lev&eacute;e de 1 M&eacute;ch.\/s, sans latence, autorise l&rsquo;emploi de multiplexeurs en remplacement de CAN ind&eacute;pendants, plus co&ucirc;teux et &agrave; vitesse de conversion plus basse, r&eacute;duisant ainsi le co&ucirc;t global et la complexit&eacute; du syst&egrave;me.<br \/>\nCe circuit est le produit dominant dans une famille de CAN SAR 16\/18\/20, &agrave; compatibilit&eacute; de brochage et de logiciel, ayant des vitesses de 250 k&eacute;ch.\/s &agrave; 2 M&eacute;ch.\/s, avec des interfaces s&eacute;rie SPI. La famille fonctionne sur une tension d&rsquo;entr&eacute;e de 2,5 V, avec une gamme de tensions d&rsquo;entr&eacute;e diff&eacute;rentielles de &plusmn;5 V, utilisant une r&eacute;f&eacute;rence de tension externe de 5 V. &Agrave; 1 M&eacute;ch.\/s, la consommation du composant n&rsquo;est que de 21 mW et est proportionnelle &agrave; la vitesse d&rsquo;&eacute;chantillonnage. Un mode arr&ecirc;t r&eacute;duit encore la puissance dissip&eacute;e &agrave; 2,5 &micro;W au repos. La caract&eacute;ristique unique de compression de gain num&eacute;rique (DGC) autorise la suppression de l&rsquo;alimentation n&eacute;gative de l&rsquo;ampli pilote du CAN, en pr&eacute;servant sa r&eacute;solution totale, pour obtenir la plus faible consommation dans le cheminement du signal, avec seulement une l&eacute;g&egrave;re r&eacute;duction de la caract&eacute;ristique SNR.<br \/>\nCe CAN SAR est disponible en petits bo&icirc;tiers MSOP&#8209;16 et DFN-16 de 4 x 3mm. Le kit d&rsquo;&eacute;valuation DC1925A montre ses performances INL de 0,5ppm et SNR de 104 dB. La carte poss&egrave;de le pilote de CAN LT6203, souple d&rsquo;emploi, pour assurer l&rsquo;interface avec les signaux d&rsquo;entr&eacute;e diff&eacute;rentiels ou unipolaires, et la r&eacute;f&eacute;rence de tension de pr&eacute;cision LTC6655-5 de 5 V, &agrave; bas niveau de bruit et de faible consommation. Pour une vraie r&eacute;alisation de la cha&icirc;ne de signal, de basse consommation, utilisant la caract&eacute;ristique de compression de gain num&eacute;rique, il est recommand&eacute; d&rsquo;utiliser l&rsquo;ampli pilote LTC6362, tout diff&eacute;rentiel, fonctionnant sur une seule alimentation de 5 V\/1 mA, qui atteint un SNR de 100 dB quand il est associ&eacute; &agrave; ce CAN et &agrave; la r&eacute;f&eacute;rence de tension 4,096 V LTC6655-4,096. <\/p>\n<\/p>\n<p><a href=\"http:\/\/www.linear.com\/product\/ltc2378-20\" target=\"_blank\" title=\"www.linear.com\/product\/LTC2378-20\" rel=\"noopener\">www.linear.com\/product\/LTC2378-20<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pr\u00e9sentant une vraie r\u00e9solution sur 20 bits, le LTC2378-20 de Linear Technology est un convertisseur analogique-num\u00e9rique \u00e0 registre \u00e0 approximations successives (SAR) de 1 M\u00e9ch\/s, sans \u00e9tat de latence, avec une erreur de non lin\u00e9arit\u00e9 int\u00e9grale (INL) exceptionnellement basse de 0,5 ppm typique et de 2 ppm maxi. L\u2019INL est une caract\u00e9ristique cl\u00e9 dans les applications de pr\u00e9cision, comme celles de la gestion des s\u00e9ismes et la fabrication des semiconducteurs, puisqu\u2019elle indique de combien la fonction de transfert du CAN d\u00e9vie de la courbe id\u00e9ale.<\/p>\n","protected":false},"author":22,"featured_media":227211,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[881],"tags":[],"domains":[47],"ppma_author":[1149],"class_list":["post-227210","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"<title>CAN SAR 20 bits sans latence, 1M\u00e9ch\/s, INL de 0,5 ppm ...<\/title>\n<meta name=\"description\" content=\"Pr\u00e9sentant une vraie r\u00e9solution sur 20 bits, le LTC2378-20 de Linear Technology est un convertisseur analogique-num\u00e9rique \u00e0 registre \u00e0 approximations...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/227210\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CAN SAR 20 bits sans latence, 1M\u00e9ch\/s, INL de 0,5 ppm\" \/>\n<meta property=\"og:description\" content=\"Pr\u00e9sentant une vraie r\u00e9solution sur 20 bits, le LTC2378-20 de Linear Technology est un convertisseur analogique-num\u00e9rique \u00e0 registre \u00e0 approximations successives (SAR) de 1 M\u00e9ch\/s, sans \u00e9tat de latence, avec une erreur de non lin\u00e9arit\u00e9 int\u00e9grale (INL) exceptionnellement basse de 0,5 ppm typique et de 2 ppm maxi. L\u2019INL est une caract\u00e9ristique cl\u00e9 dans les applications de pr\u00e9cision, comme celles de la gestion des s\u00e9ismes et la fabrication des semiconducteurs, puisqu\u2019elle indique de combien la fonction de transfert du CAN d\u00e9vie de la courbe id\u00e9ale.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/227210\/\" \/>\n<meta property=\"og:site_name\" content=\"EENewsEurope\" \/>\n<meta property=\"article:published_time\" content=\"2013-05-30T22:00:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ecinews.fr\/wp-content\/uploads\/import\/default\/files\/import\/eci6486_ltc-2378-20.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1885\" \/>\n\t<meta property=\"og:image:height\" content=\"1346\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"eeNews Europe\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta 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