{"id":225471,"date":"2012-10-25T22:00:00","date_gmt":"2012-10-25T22:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/convertisseurs-na-conformes-a-la-norme-docsis-3-0\/"},"modified":"2012-10-25T22:00:00","modified_gmt":"2012-10-25T22:00:00","slug":"convertisseurs-na-conformes-a-la-norme-docsis-3-0","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/convertisseurs-na-conformes-a-la-norme-docsis-3-0\/","title":{"rendered":"Convertisseurs NA conformes \u00e0 la norme DOCSIS 3.0"},"content":{"rendered":"<p class=\"MsoNormal\" style=\"margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal\">Ces convertisseurs prennent en charge jusqu&rsquo;&agrave; 158 porteuses de t&eacute;l&eacute;vision c&acirc;bl&eacute;e et, en option, incluent un filtre d&rsquo;interpolation qui r&eacute;duit la complexit&eacute; du filtrage de sortie en augmentant de mani&egrave;re efficace la fr&eacute;quence d&rsquo;actualisation du convertisseur par un facteur de 2. En mode de fonctionnement Mix-Mode Super-Nyquist, la version 14 bits peut reconstituer des porteuses RF spectralement pures dans les deuxi&egrave;mes et troisi&egrave;mes zones Nyquist, ce qui permet d&rsquo;&eacute;liminer un &eacute;tage de m&eacute;lange tout en maintenant une plage dynamique exceptionnelle jusqu&rsquo;&agrave; &nbsp;4,2 GHz. Ce convertisseur comprend une interface de signalisation diff&eacute;rentielle basse tension LVDS double port synchronis&eacute;e sur la source qui simplifie le transfert des donn&eacute;es vers un circuit ASIC ou un circuit logique programmable sur site h&ocirc;te (FPGA). Des boucles DLL optimisent la synchronisation entre diff&eacute;rents domaines d&rsquo;horloge, tandis qu&rsquo;une interface s&eacute;rie SPI est utilis&eacute;e pour configurer le convertisseur et surveiller l&rsquo;&eacute;tat des registres de lecture (readback).<br \/>\n&quot;Le convertisseur num&eacute;rique\/analogique RF AD9129 utilise l&rsquo;architecture &agrave; quatre commutateurs brevet&eacute;e par Analog Devices pour synth&eacute;tiser la totalit&eacute; du spectre de sortie en bande de base, du continu &agrave; 1,4 GHz. Cette approche simplifie et am&eacute;liore consid&eacute;rablement la conception des &eacute;metteurs conformes &agrave; la norme DOCSIS 3.0 en liaison descendante&quot;, a d&eacute;clar&eacute; Carlton Lane, directeur du marketing, groupe High-speed D\/A Converter, Analog Devices. &quot;Le niveau de performances et de fonctionnalit&eacute; de ce nouveau convertisseur num&eacute;rique\/analogique permet aux fabricants d&rsquo;&eacute;quipements pour infrastructures c&acirc;bl&eacute;es de mettre en &oelig;uvre la cha&icirc;ne de signal sur liaison descendante dans un encombrement r&eacute;duit, en divisant la consommation par trois et en utilisant moins de composants dans la cha&icirc;ne du signal. Ces aspects jouent un r&ocirc;le important dans les environnements de raccordement de modems-c&acirc;bles.&quot;<br \/>\nLe convertisseur N\/A 11 bits &nbsp;assure des performances de synth&egrave;se RF directe &agrave; la pointe de l&rsquo;industrie, avec une perte minimale de puissance de sortie dans l&rsquo;ensemble du spectre de sortie. Il permet &eacute;galement un fonctionnement &agrave; double front d&rsquo;horloge, portant effectivement la fr&eacute;quence d&rsquo;actualisation du convertisseur &agrave; 5,6 G&eacute;ch\/s lorsqu&rsquo;il est configur&eacute; en mode d&rsquo;interpolation 2x ou Mix-Mode. Son importante plage dynamique et sa large bande passante permettent de g&eacute;n&eacute;rer plusieurs porteuses jusqu&rsquo;&agrave; 4,2 GHz. Ce composant dissipe seulement 1,1 W &agrave; la fr&eacute;quence d&rsquo;actualisation maximale du convertisseur, c&rsquo;est-&agrave;-dire &agrave; 2,8 G&eacute;ch\/s.<br \/>\nEncapsul&eacute;s en bo&icirc;tier BGA 160, ces CNA peuvent &ecirc;tre associ&eacute;s avec les composants de la gamme comme la boucle PLL large bande ADF4351 utilis&eacute;e en tant qu&rsquo;horloge, le tampon d&rsquo;horloge faible gigue ADCLK925 et le m&eacute;langeur en r&eacute;ception ADRF6602, en fonction de l&rsquo;application finale.<\/p>\n<p class=\"MsoNormal\" style=\"margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal\">&nbsp;<\/p>\n<p class=\"MsoNormal\" style=\"margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal\"><a title=\"www.analog.com\/AD9129\" target=\"_blank\" href=\"http:\/\/www.analog.com\/AD9129\" rel=\"noopener\">www.analog.com\/AD9129<\/a><\/p>\n<p class=\"MsoNormal\" style=\"margin-bottom:0cm;margin-bottom:.0001pt;line-height:normal\">&nbsp;<\/p>\n<p><a title=\"www.analog.com\/AD9119\" target=\"_blank\" href=\"http:\/\/www.analog.com\/AD9119\" rel=\"noopener\">www.analog.com\/AD9119<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Supportant des fr\u00e9quences d\u2019\u00e9chantillonnage pouvant atteindre 2,8 G\u00e9ch\/s, les convertisseurs num\u00e9rique\/analogique radiofr\u00e9quences monovoie AD9129 14 bits et AD9119 11 bits d\u2019Analog Devices sont capables de synth\u00e9tiser la totalit\u00e9 du spectre de c\u00e2ble en liaison descendante (\u00e9mission) \u00e0 partir d\u2019un unique port de conversion N\/A. Ils permettent aussi de r\u00e9duire la consommation totale et le nombre de composant des \u00e9quipement  d\u2019infrastructure de t\u00e9l\u00e9vision par c\u00e2ble et des \u00e9quipements de raccordement de modems- c\u00e2bles (CMTS), de simplifier la conception des syst\u00e8mes et de r\u00e9duire le co\u00fbt de la nomenclature.<\/p>\n","protected":false},"author":22,"featured_media":225472,"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-225471","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Convertisseurs NA conformes \u00e0 la norme DOCSIS 3.0 ...<\/title>\n<meta name=\"description\" content=\"Supportant des fr\u00e9quences d\u2019\u00e9chantillonnage pouvant atteindre 2,8 G\u00e9ch\/s, les convertisseurs num\u00e9rique\/analogique radiofr\u00e9quences monovoie AD9129 14...\" \/>\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\/225471\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Convertisseurs NA conformes \u00e0 la norme DOCSIS 3.0\" \/>\n<meta property=\"og:description\" content=\"Supportant des fr\u00e9quences d\u2019\u00e9chantillonnage pouvant atteindre 2,8 G\u00e9ch\/s, les convertisseurs num\u00e9rique\/analogique radiofr\u00e9quences monovoie AD9129 14 bits et AD9119 11 bits d\u2019Analog Devices sont capables de synth\u00e9tiser la totalit\u00e9 du spectre de c\u00e2ble en liaison descendante (\u00e9mission) \u00e0 partir d\u2019un unique port de conversion N\/A. Ils permettent aussi de r\u00e9duire la consommation totale et le nombre de composant des \u00e9quipement d\u2019infrastructure de t\u00e9l\u00e9vision par c\u00e2ble et des \u00e9quipements de raccordement de modems- c\u00e2bles (CMTS), de simplifier la conception des syst\u00e8mes et de r\u00e9duire le co\u00fbt de la nomenclature.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/225471\/\" \/>\n<meta property=\"og:site_name\" content=\"EENewsEurope\" \/>\n<meta property=\"article:published_time\" content=\"2012-10-25T22:00:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ecinews.fr\/wp-content\/uploads\/import\/default\/files\/import\/eci6263_adi-ad9129-rgb-lo.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1860\" \/>\n\t<meta property=\"og:image:height\" content=\"1860\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"eeNews Europe\" \/>\n<meta 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