{"product_id":"mikroe-4766-headphone-amp-click-board-uk","title":"Headphone AMP Click Board™","description":"\u003ch3\u003eHow Does The Headphone AMP Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cem\u003e\u003cstrong\u003eHeadphone AMP Click Board™\u003c\/strong\u003e\u003c\/em\u003e as its foundation uses the LM4811, a stereo, analog input headphone amplifier with digital volume control from Texas Instruments. This headphone amplifier is designed to provide a high-quality output power using few external components and does not require bootstrap capacitors or snubber networks for stability improvement. The maximum power delivered by the LM4811 headphone amplifier is 105mW per one channel into 16Ω and 70mW with 16Ω load impedance. Other prominent features of the ML4811 also include digital volume control, \"Click and Pop\" suppression circuitry, and a low shutdown current of 0.3μA typical.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/www.mikroe.com\/img\/images\/HeadPhone_AMP_click_inneri22.jpg\" src=\"https:\/\/www.mikroe.com\/img\/images\/HeadPhone_AMP_click_inneri22.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eHeadphone AMP Click Board™\u003c\/strong\u003e communicates with MCU using several GPIO pins. The signals from the CLK and U\/D pins, routed to the PWM and INT pins of the mikroBUS™ socket, controls the LM4811's gain. At each rising edge of the CLK signal, the gain will increase or decrease by a 3dB step depending on the logic voltage level applied to the U\/D pin. A logic high voltage level applied to the U\/D pin causes the gain to increase by 3dB at each rising edge of the CLK signal and vice versa. Upon devices' Power-On features, the amplifier's gain is set to a default value of 0dB. Sixteen discrete gain settings are available, ranging from +12dB maximum to −33dB minimum.\u003c\/p\u003e\n\n\u003cp\u003eThe unity-gain stable LM4811 also features an externally controlled, active-high, micro-power consumption Shutdown mode, available on the RST pin of the mikroBUS™ socket, to reduce power consumption while not in use. However, when coming out of Shutdown mode, the LM4811 will revert back to its previous gain setting. Alongside all these features, the LM4811 also has an internal thermal shutdown protection mechanism.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eHeadphone AMP Click Board™\u003c\/strong\u003e can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eSignal Processing\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eCan be used for portable electronics and audio systems, representing a perfect solution for remote, headphone audio-volume control applications\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003eLM4811 - stereo, analog input headphone amplifier with digital volume control from Texas Instruments\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eLow power consumption, digital volume control, \"Click and Pop\" suppression, high-quality output power, no bootstrap capacitors, Shutdown feature, and more\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eGPIO,PWM\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eL (57.15 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V or 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePinout diagram\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout on Headphone AMP Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003e\u003cimg alt=\"\" data-entity-type=\"\" data-entity-uuid=\"\" data-mce-src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eCLK\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eClock Signal\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eShutdown\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eRST\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eU\/D\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGain Control\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower Supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e3.3V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e5V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003ePower Supply\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eOnboard settings and indicators\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault\u003c\/th\u003e\n            \u003cth\u003e Description\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eLD1\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePower LED Indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJP1\u003c\/td\u003e\n            \u003ctd\u003eVCC SEL\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003eLogic Level Voltage Selection 3V3\/5V: Left position 3V3, Right position 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eHeadphone Amp Click electrical specifications\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n            \u003cth\u003eMin\u003c\/th\u003e\n            \u003cth\u003eTyp\u003c\/th\u003e\n            \u003cth\u003eMax\u003c\/th\u003e\n            \u003cth\u003eUnit\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSupply Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eV\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOutput Power (@ 16Ω load)\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003e105\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003emW\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOperating Temperature Range\u003c\/td\u003e\n            \u003ctd\u003e-40\u003c\/td\u003e\n            \u003ctd\u003e+25\u003c\/td\u003e\n            \u003ctd\u003e+85\u003c\/td\u003e\n            \u003ctd\u003e°C\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e \u003c\/h3\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default 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