{"id":230796,"date":"2014-09-02T22:00:00","date_gmt":"2014-09-02T22:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/convertisseurs-pwm-12-bits-sorties-en-tension-precises-sans-ondulation-et-sans-retard\/"},"modified":"2014-09-02T22:00:00","modified_gmt":"2014-09-02T22:00:00","slug":"convertisseurs-pwm-12-bits-sorties-en-tension-precises-sans-ondulation-et-sans-retard","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/convertisseurs-pwm-12-bits-sorties-en-tension-precises-sans-ondulation-et-sans-retard\/","title":{"rendered":"Convertisseurs PWM 12 bits, sorties en tension pr\u00e9cises sans ondulation et sans retard"},"content":{"rendered":"

Le LTC2645 offre une solution simple pour régler et fixer quatre tensions sans le recours à une seule ligne de code. Présenté en un petit boîtier MSOP de 16 broches, le LTC2645 est approprié pour la polarisation, le calibrage, la fixation de niveau, le réglage d’alimentation et pour permettre des transmissions isolées par photocoupleur dans les applications comme l’automatisation industrielle, le contrôle de processus 4-20mA, l’instrumentation, les équipements de test et les modules optiques. Une version double, le LTC2644, est disponible en un boîtier MSOP de 12 de broches.<\/p>\n

Le LTC2645 mesure la période et la largeur d’impulsion des signaux PWM d’entrée et actualise les CNA après chaque front de montée PWM d’entrée, acceptant les fréquences d’entrée PWM de 30Hz à 100kHz. Une broche IDLSEL procure de la souplesse quant à la fixation des niveaux de sortie pour la mise en repos à zéro ou à pleine échelle, l’arrêt avec une sortie à haute impédance, ou le maintien indéfiniment de l’état précédent en réponse à un signal d’entrée PWM. Ce mode commode possède des avantages par rapport aux réalisations à filtre analogique qui nécessitent un fonctionnement PWM continu. Chaque sortie rail-à-rail du CNA peut délivrer ou absorber 5mA (3V) ou 10mA (5V) et présente une tension de sortie à pleine échelle de 2,5V, avec une référence de tension interne à 10ppm\/°C ou une tension de sortie à pleine échelle égale à la tension de la référence externe.<\/p>\n

Le LTC2645 fonctionne sur une seule alimentation de 2,5V à 5,5V, et accepte des tensions d’entrée PWM de 1,71V à 5,5V. Le composant consomme seulement 4mA sur une alimentation de 3V et une consommation inférieure à 1µA en mode arrêt avec des sorties à haute impédance.<\/p>\n

Le LTC2645 est présenté en versions 8bits \/ 10bits \/ 12bits et est disponible, aujourd’hui, dans les classes de températures commerciales, industrielles et de l’automobile (-40°C à 125°C). La carte d’évaluation, DC2197A, de la famille LTC2645 fonctionne avec le système de développement de microprogramme Linduino utilisant le DC2026, et est disponible à www.linear.com\/demo<\/a> ou via un revendeur local de Linear Technology. <\/p>\n

www.linear.com\/product\/LTC2645<\/a> <\/p>\n

www.linear.com<\/a>\/solutions\/linduino<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Linear Technology pr\u00e9sente la famille LTC2645 de convertisseurs num\u00e9riques-analogiques (CNA), de 4 canaux PWM, 8bits \/ 10bits \/ 12bits, sorties en tension, avec une r\u00e9f\u00e9rence de tension \u00e0 10ppm\/\u00b0C. Ces versions convertissent des signaux d’entr\u00e9e PWM en tensions stables et pr\u00e9cises, en moins de 8\u00b5s, ce qui \u00e9limine l’ondulation et le retard typiquement associ\u00e9s aux filtres analogiques.<\/p>\n","protected":false},"author":22,"featured_media":230797,"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-230796","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"Convertisseurs PWM 12 bits, sorties en tension pr\u00e9cises sans o...<\/title>\n<meta name=\"description\" content=\"Linear Technology pr\u00e9sente la famille LTC2645 de convertisseurs num\u00e9riques-analogiques (CNA), de 4 canaux PWM, 8bits \/ 10bits \/ 12bits, sorties en tension,...\" \/>\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\/230796\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Convertisseurs PWM 12 bits, sorties en tension pr\u00e9cises sans ondulation et sans retard\" \/>\n<meta property=\"og:description\" content=\"Linear Technology pr\u00e9sente la famille LTC2645 de convertisseurs num\u00e9riques-analogiques (CNA), de 4 canaux PWM, 8bits \/ 10bits \/ 12bits, sorties en tension, avec une r\u00e9f\u00e9rence de tension \u00e0 10ppm\/\u00b0C. 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