Raspberry pi 4 Computer Model B HIFI DAC+AMP Expansion Board, X450 Audio Sound Card for Raspberry Pi 4/Pi 3B+ Plus/3B
Note: The Raspberry Pi board is not included. Do not apply power to your Raspberry Pi via the PI's Micro USB socket. Key Features: Full-HD audio – up to 24-bit/192kHz playback Audiophile ESS Technology Sabre premier stereo DAC ES9023 ES9023 delivers jitter-free studio quality audio with 112dB DNR Built in High quality Class-D stereo audio amplifiers (TI TPA3116D2 x2) Up to 2×100W Into a 4-Ω BTL Load at 21Vdc Capable of driving 4 Ohm speakers (also works with higher impedance speakers) Uses the Texas Instruments ultra-low-noise voltage regulator (output noise< 10μVRMS) Uses the Texas Instruments high efficiency step-Down DC converter (up to 95%) 6V~26Vdc converted to 5.1V, 3A to power the Raspberry Pi Uses the genuine ALPS RK163 series potentiometer for smooth volume adjustment Built in high quality IR sensor (Vishay -the world's leading supplier of infrared receivers) Onboard 3.5mm stereo headphone jack allowing audio input form other audio devices Onboard pluggable speaker & power screw terminals Onboard PH2.0 connector allowing to connect a lighted power switch Onboard XH2.54 connector providing 5V output to power other devices Onboard gold-plated high-current DC power jack (5.5x2.5mm) Uses the digital I2S audio signals to reduce CPU load over USB audio solutions Connects directly to the Raspberry Pi - No wiring required Powers the Raspberry Pi - no additional power supply Reserved Raspberry Pi GPIO pin header (2x13Pins) Pop-noise can be improved by enabling GPIO control AMP can be enabled / disabled with jumper link Heat-sink attached to amplifiers for perfect heat dissipation Specification : Power supply: 6-26Vdc，≥3A recommended GPIO used : LRCK - IO19, BCK - IO18, DATA - IO21, IR - IO26, AMP mute - IO22 Analog audio input level via onboard headphone jack : 2V RMS Amplifier max output power: 2×100W at 4Ω BTL Load at 21Vdc Resolution/Sampling Rate: upto 24bit / 192KHz (Raspberry Pi I2S) PCB size 87 x 56mm Packing List: 1 x X450 DAC+AMP Expansion Board 1 x Installation screw pack How to use the pin header marked “PWR ON” , “SPK MUTE” and “AMP OFF”?