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LM4921 for dual-channel headphone amplifier typical circuit

2015-01-05 10:58  
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LM4921 for dual-channel headphone amplifier typical circuit diagram
Figure shows the typical circuit of LM4921 stereo headphone amplifier. SPI interface bus J1 input controls lines signal: serial data signal SPI-DATA, serial enable signal SPI-ENABLE, serial clock signal SPI-CLK. J2 input of the I2S interface bus controls the full range of serial digital audio signal: I2S data signals I2S-DATA, I2S clock I2S-CLK. I2S word select signal I2S-WS (also known as the Right / Left Select). MCLK signal is input from P1: When S1 is off, it selects the external master clock MCLK input; when S1 is short, it uses internal oscillator (11.2896MHz).