{"product_id":"dual-105mw-headphone-amplifier-with-digital-volume-control-and-shutdown-mode","title":"Dual 105mW Headphone Amplifier with Digital Volume Control and Shutdown Mode","description":"\u003cp\u003eThis is a low noise\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eHeadphone Amplifier\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecapable of delivering\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e105mW\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eper channel of continuous average power into a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e16Ω load\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003e0.1% (THD+N)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efrom a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e5V\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003epower supply. The project is based on the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eLM4811\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003echip from the boomer series. The board provides high-quality output power with a minimal number of external components. It features a digital volume control that sets the amplifier’s gain from\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e+12dB to −33dB\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ein 16 discrete steps using a two−wire interface or onboard 3 tactile switches. On-board jumper implements the shutdown feature. The chip also has an internal thermal shutdown protection mechanism.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eConnector CN1 Audio Input\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003ePin 1 Audio Signal Input 1\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePin 2 GND\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePin 3 GND\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePin 4 Audio Signal Input 2\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eConnector CN3 Power Supply\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003ePin 1 +5V DC Input\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePin 2 GND\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOthers\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector LS1 and LS2:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eOptional Speaker or Headphone Connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector CN4:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e3.5MM Stereo EP Female socket for Headphone\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector CN2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eExternal\/Optional 2 Wire Gain Control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJumper J1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCloses = Enable, J1 Open Shutdown\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED D1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePower LED\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitch 1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eClock Input, Increment Steps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitch 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eVolume Down Operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitch 3:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eVolume Up Operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Power Supply 5V DC\u003c\/li\u003e\n\u003cli\u003eOutput 105mW Stereo\u003c\/li\u003e\n\u003cli\u003eOn-Board Power LED\u003c\/li\u003e\n\u003cli\u003eDigital Volume Control Range from +12dB to −33dB\u003c\/li\u003e\n\u003cli\u003e“Click and Pop” Suppression Circuitry\u003c\/li\u003e\n\u003cli\u003eTHD+N at 1kHz, 105mW Continuous Average Output Power into 16Ω 0.1 % (typ)\u003c\/li\u003e\n\u003cli\u003eTHD+N at 1kHz, 70mW Continuous Average Power into 32Ω 0.1 % (typ)\u003c\/li\u003e\n\u003cli\u003eLow Shutdown Current\u003c\/li\u003e\n\u003cli\u003e3 Tactile Switches to set the Gain\u003c\/li\u003e\n\u003cli\u003eOptional 3 Pin Header Connector for 2 Wire Interface for Micro-Controller for Gain\u003c\/li\u003e\n\u003cli\u003eOn-Board Stereo EP Socket for Easy Headphone Interface\u003c\/li\u003e\n\u003cli\u003eOptional 2 x Header Connector for Headphone\/Speaker Connections\u003c\/li\u003e\n\u003cli\u003eHeader Connector for Power Supply\u003c\/li\u003e\n\u003cli\u003eJumper for Shutdown\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 39.21 x 37.47 mm\u003c\/li\u003e\n\u003cli\u003e4 x 2.5MM Mounting Holes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47036760490156,"sku":"A109","price":12.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/A109A.jpg?v=1787567009","url":"https:\/\/dotfry.com\/products\/dual-105mw-headphone-amplifier-with-digital-volume-control-and-shutdown-mode","provider":"dotfry","version":"1.0","type":"link"}