{"product_id":"building-a-5-v-single-supply-electret-microphone-preamp","title":"Building a 5 V Single-Supply Electret Microphone Preamp","description":"\u003cp\u003eThe TLV6741 is a 10 MHz op amp with low broadband noise. Its small SC70-5 package and low operating voltage make it well suited to this kind of preamplifier circuit.\u003c\/p\u003e\n\u003cp\u003eThe circuit uses the op amp in a transimpedance amplifier configuration, converting the microphone's current output into an output voltage. A resistive divider biases the non-inverting input at mid-supply, holding the common-mode voltage constant. This eliminates input-stage crossover distortion that would otherwise appear at the extremes of the signal swing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eSpecs and Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePower input: 5 V DC\u003c\/li\u003e\n\u003cli\u003eFrequency response: 20 Hz to 20 kHz\u003c\/li\u003e\n\u003cli\u003eOutput voltage: 1.2 V\u003c\/li\u003e\n\u003cli\u003eKey IC: Texas Instruments TLV6741 op amp (SC70-5 package, 10 MHz, low broadband noise)\u003c\/li\u003e\n\u003cli\u003eMicrophone: PUI Audio condenser microphone (MK1)\u003c\/li\u003e\n\u003cli\u003eSingle 3-pin header for power, ground, and audio output\u003c\/li\u003e\n\u003cli\u003ePCB dimensions: 22.54 mm x 8.26 mm\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47187031916716,"sku":"A125","price":8.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/A125.jpg?v=1789127509","url":"https:\/\/dotfry.com\/products\/building-a-5-v-single-supply-electret-microphone-preamp","provider":"dotfry","version":"1.0","type":"link"}