What are the advantages of I2S input digital audio power amplifier IC with built-in DSP

With the reform and upgrading of the market and the gradual popularity of digital audio power amplifiers, they have obvious advantages in signal-to-noise ratio and sound quality:

    (1) The bottom noise is extremely small. The digital power amplifier chip is free from interference in the audio signal transmission process, and the bottom noise is much smaller than the analog power amplifier itself.

    (2) Simple wiring, few peripherals. The vast majority of low noise, noise and other problems are caused by PCB wiring or device interference. Many boards cannot avoid interference due to area and structure limitations; The digital power amplifier is not easy to be interfered by the periphery, so there is no need to worry about improper ground distribution and PCB wiring; The gain of digital power amplifier chip is controlled by I2C, without peripheral resistance and fewer peripheral components.

    (3) With DSP sound effect adjustment and 3-segment DRC. The analog input power amplifier chips are generally tuned by the front stage operational amplifier circuit. Many digital power amplifiers are built with DSP, which greatly simplifies the tuning process,; Many low-end Bluetooth masters do not have DRC functions. They are equipped with digital power amplifier chips to ensure high-quality audio output and the overall circuit BOM is cost-effective.

    (4) Bluetooth signal is directly connected with power amplifier for high efficiency and fidelity. The internal signals of the Bluetooth chip are all digital signals. However, considering that the external analog power amplifier may be connected, an additional DAC conversion chip will be added. However, due to cost constraints, the accuracy is generally low and the audio quality will be damaged. With digital power amplifier, digital signals can be directly connected to reduce conversion loss.