{"product_id":"adafruit-mono-2-5w-class-d-audio-amplifier-pam8302","title":"Adafruit Mono 2.5W Class D Audio Amplifier - PAM8302","description":"\u003cp\u003eThis super small mono amplifier is surprisingly powerful - able to deliver up to 2.5 Watts into 4-8 ohm impedance speakers.\u003c\/p\u003e\n\u003cp\u003eInside the miniature chip is a class D controller, able to run from 2.0V-5.5VDC. Since the amp is a class D, its very efficient (over 90% efficient when driving an 8Ω speaker at over half a Watt) - making it perfect for portable and battery-powered projects. It has built in thermal and over-current protection but we could barely tell it got hot. There's even a volume trim pot so you can adjust the volume on the board down from the default 24dB gain. This board is a welcome upgrade to basic \"LM386\" amps!\u003c\/p\u003e\n\u003cp\u003eThe A+ and A- inputs of the amplifier go through 1.0uF capacitors, so they are fully 'differential' - if you don't have differential outputs, simply tie the Audio- pin  to ground. The output is \"Bridge Tied\" - that means the output pins connect directly to the speaker pins, no connection to ground. The output is a high frequency 250KHz square wave PWM that is then 'averaged out' by the speaker coil - the high frequencies are not heard. All the above means that you can't connect the output into another amplifier, it should drive the speakers directly.\u003c\/p\u003e\n\u003cp\u003eComes with a fully assembled and tested breakout board. Also included are a header to plug it into a breadboard and a 3.5mm screw-terminal blocks so you can easily attach\/detach your speaker. You will be ready to rock in 15 minutes! \u003cb\u003eSpeaker is not included, use any 4 ohm or greater impedance speaker.\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOutput Power: 2.5W at 4Ω, 10% THD, 1.5W at 8Ω, 10% THD, with 5.5V Supply\u003c\/li\u003e\n\u003cli\u003e50dB PSRR at 1KHz\u003c\/li\u003e\n\u003cli\u003eFilterless design, with ferrite bead + capacitors on output.\u003c\/li\u003e\n\u003cli\u003eFixed 24dB gain, onboard trim potentiometer for adjusting input volume.\u003c\/li\u003e\n\u003cli\u003eThermal and short-circuit\/over-current protection\u003c\/li\u003e\n\u003cli\u003eLow current draw: 4mA quiescent and 1uA in shutdown mode\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e The terminal block included with your product may be blue or black.\u003c\/p\u003e\n\u003ch2\u003eTECHNICAL DETAILS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/files\/PAM8302A.pdf?8298622467428888666\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ePAM8302A datasheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca target=\"_blank\" href=\"https:\/\/github.com\/adafruit\/Adafruit-PAM8302-Mono-Amplifier-PCB\" rel=\"noopener noreferrer\"\u003eEagleCAD PCB files on GitHub\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca target=\"_blank\" href=\"https:\/\/github.com\/adafruit\/Fritzing-Library\" rel=\"noopener noreferrer\"\u003eFritzing object available in Adafruit Fritzing library\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDimensions (without 0.1\" header):\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e15mm x 24mm x 2mm \/ 0.6\" x 0.9\" x 0.08\"\u003c\/li\u003e\n\u003cli\u003eWeight: 1.4g\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":3075960766474,"sku":"ADA2130","price":4.0,"currency_code":"CHF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/2130-01.jpg?v=1524827792","url":"https:\/\/shop.pimoroni.com\/en-ch\/products\/adafruit-mono-2-5w-class-d-audio-amplifier-pam8302","provider":"Pimoroni Ltd","version":"1.0","type":"link"}