{"id":4786,"date":"2021-01-15T19:09:39","date_gmt":"2021-01-15T18:09:39","guid":{"rendered":"https:\/\/www.pilover.com\/?post_type=product&#038;p=4786"},"modified":"2026-07-24T15:16:11","modified_gmt":"2026-07-24T13:16:11","slug":"dac-a-12-bit-con-interfaccia-i2c-chip-mcp4725","status":"publish","type":"product","link":"https:\/\/www.pilover.com\/it\/negozio\/dac-a-12-bit-con-interfaccia-i2c-chip-mcp4725\/","title":{"rendered":"DAC a 12 bit &#8211; I2C &#8211; Chip MCP4725"},"content":{"rendered":"<h2>DAC a 12 bit con interfaccia I2C &#8211; Chip MCP4725<\/h2>\n<p>Il tuo microcontroller probabilmente ha un ADC (convertitore analogico -> digitale) ma probabilmente non ha un DAC (convertitore digitale -> analogico). Con questo prodotto potrai averlo! <\/p>\n<p>Questa scheda breakout <strong>presenta un DAC a 12 bit (MCP4725) facile da utilizzare<\/strong>. \u00c8 possibile <strong>controllarlo attraverso I2C<\/strong> e inviargli il valore di output, e il pin VOUT eseguir\u00e0. Questo DAC \u00e8 ottimo per progetti audio \/ analogici, ad esempio quando non \u00e8 possibile utilizzare PWM ma \u00e8 necessaria un&#8217;onda sinusoidale oppure un punto di polarizzazione regolabile.<\/p>\n<p><strong>Il pin ADDR \u00e8 &#8220;broken out&#8221; in modo che sia possibile collegare due di questi DAC su un bus I2C.<\/strong> Per evitare conflitti baster\u00e0 collegare il pin ADDR di uno in &#8216;high&#8217;. \u00c8 inclusa anche un header a 6 pin, da utilizzare in una breadboard. <strong>Funziona con logica a 3.3V o 5V<\/strong>.<\/p>\n<p><strong>Caratteristiche del chip MCP4725<\/strong><\/p>\n<ul>\n<li>Per i chip che hanno Fast Mode I2C 3.4 Mbps (Arduino non ce l&#8217;ha) puoi aggiornare Vout a ~ 200 KHz.<\/li>\n<li>C&#8217;\u00e8 una EEPROM: se scrivi la tensione di output, puoi &#8220;memorizzarla&#8221;, quindi se il dispositivo viene spento e riacceso ripristiner\u00e0 quella tensione.<\/li>\n<li>La tensione di uscita \u00e8 rail-to-rail ed \u00e8 proporzionale al pin di alimentazione, quindi se lo fai funzionare da 3.3 V, l&#8217;intervallo di output \u00e8 0-3.3V. Se lo fai funzionare da 5 V, l&#8217;intervallo di output \u00e8 0-5 V.<\/li>\n<\/ul>\n<p>Consulta la seguente libreria e tutorial di facile utilizzo per Arduino di <a href=\"https:\/\/www.pilover.com\/?attachment_id=4795\" rel=\"attachment wp-att-4795 noopener\" target=\"_blank\">Adafruit per MCP4725<\/a>. Presenta esempi di &#8220;triangle-wave&#8221; e &#8220;sine-wave output&#8221; che pu\u00f2 essere utilizzato con qualsiasi Arduino o portato su qualsiasi microcontroller con host I2C.  <\/p>\n<p><strong>Il cablaggio \u00e8 facile<\/strong>: collega VDD al pin di alimentazione del tuo microcontroler (3-5 V), GND a massa, SDA a I2C Data (su Arduino Uno, questo \u00e8 A4 su Mega \u00e8 20 e su Leonardo digital 2), SCL a I2C Clock (su Arduino Uno, questo \u00e8 A5, su Mega \u00e8 21 e su Leonardo digital 3) e ascolta su VOUT.<\/p>\n<p><strong>Dettagli tecnici<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/www.pilover.com\/?attachment_id=4797\" rel=\"attachment wp-att-4797 noopener\" target=\"_blank\">MCP4725 datasheet<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/adafruit\/Adafruit_MCP4725\" target=\"_blank\" rel=\"noopener\">Libreria Arduino MCP4725 su GitHub <\/a><\/li>\n<li><a href=\"https:\/\/github.com\/adafruit\/Fritzing-Library\" target=\"_blank\" rel=\"noopener\">Fritzing Object della libreria Adafruit<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/adafruit\/Adafruit-MCP4725-PCB\" target=\"_blank\" rel=\"noopener\">EagleCAD PCB su GitHub<\/a><\/li>\n<li>Questa scheda \/ chip utilizza un indirizzo I2C a 7 bit tra 0x62-0x63, selezionabile con jumper<\/li>\n<\/ul>\n<p><strong>Nome Adafruit:<\/strong> MCP4725 Breakout Board &#8211; 12-Bit DAC with I2C Interface [ADA935]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DAC a 12 bit con interfaccia I2C &#8211; Chip MCP4725 Il tuo microcontroller probabilmente ha un ADC (convertitore analogico -> digitale) ma probabilmente non ha un DAC (convertitore digitale -> analogico). Con questo prodotto potrai averlo! Questa scheda breakout presenta un DAC a 12 bit (MCP4725) facile da utilizzare. \u00c8 possibile controllarlo attraverso I2C e [&hellip;]<\/p>\n","protected":false},"featured_media":4793,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[2174],"product_cat":[50,1715,33],"product_tag":[308,74],"class_list":["post-4786","product","type-product","status-publish","has-post-thumbnail","product_brand-adafruit","product_cat-componenti","product_cat-logica","product_cat-prototipazione","product_tag-scheda-breakout","product_tag-i2c","first","instock","shipping-taxable","purchasable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DAC a 12 bit - I2C - Chip MCP4725 - PiLover<\/title>\n<meta name=\"description\" content=\"DAC a 12 bit - I2C - Chip MCP4725 su PiLover. 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