{"product_id":"headphone-amplifier-for-dac-converter","title":"Headphone Amplifier For DAC Converter","description":"\u003cp\u003eThis is a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eheadphone amplifier\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eproject for audio digital-to-analog converters (DACs) with differential voltage outputs. This circuit converts the differential voltage output of the DAC to a single-ended, ground-referenced signal and provides the additional current necessary for low-impedance headphones. Project is built using\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eOPA1688\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003elow distortion, high-drive Sound Plus audio amplifier. The circuit tested with dual\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e+\/-5V DC\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esupply, and it can drive a load\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e16 Ohms to 600 Ohms\u003c\/strong\u003e. Headphone amplifier provides an output\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e50mW into 32 Ohms\u003c\/strong\u003e. Signal for the right channel and left channel input is applied to the amplifier through connectors CN1and CN3, respectively.\u003c\/p\u003e\n\u003cp\u003eThe positive input from the source connects to the pin labelled I1+\/I2+, the negative input from the source connects to the pin labelled I1-\/I2-, and the ground connection from the source connects to the center pin of CN1 and CN3, labelled GND. Stereo 3.5mm Female EP socket provided to interface the Headphone.  The project supports headphone of 16 Ohms, 32 Ohms and 600 Ohms, output power of the circuit depends on impedance of headphone, for example, a pair of headphones with a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e95dB\/mW\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esensitivity given a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3mW\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003einput signal produces a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100dB SPL\u003c\/strong\u003e. If the headphones have a nominal impedance of 32 Ω, then the voltage and current from the headphone amplifier (voltage=310mV RMS and current 9.86mA RMS)\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSupply +\/-5V DC\u003c\/li\u003e\n\u003cli\u003eDifferential Input Signal\u003c\/li\u003e\n\u003cli\u003eOutput Power 50mW in to 32 Ohms Headphone\u003c\/li\u003e\n\u003cli\u003eHead-Phone Loads: 16 Ohms, 32 Ohms, 600 Ohms\u003c\/li\u003e\n\u003cli\u003eFrequency Response 20Hz to 20Khz\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 42.23 x 20.16 mm\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47197324279980,"sku":"A131","price":12.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/A131.jpg?v=1789306710","url":"https:\/\/dotfry.com\/products\/headphone-amplifier-for-dac-converter","provider":"dotfry","version":"1.0","type":"link"}