AK4687EQ

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AK4687EQ is a digital sound processor product manufactured by Asahi Kasei Microdevices (AKM). The product features a wide dynamic range, low noise floor, low power consumption, and a dynamic noise canceller for reducing background noise. It is used in a variety of applications including audio amplifiers, portable audio players, car audio systems, and wireless headsets. AK4687EQ is also used in digital hearing aids and sound reinforcement systems.

AK4687EQ operates in a broad frequency range from 30 Hz to 15 kHz, and provides up to 16-bit processing resolution. The product incorporates various processing functions such as compression, expansion, noise reduction, equalization, bass and treble enhancement, and downward expansion. It is equipped with an integrated digital-to-analog converter (DAC).

The AK4687EQ integrates a configurable sigma-delta modulator to reduce power consumption. The sigma-delta modulator enables the product to process audio signals at a high-resolution and as a result, it offers low-noise performance. The product also features a dynamic noise canceling system to help reduce background noise. The product can be used with input signals from microphones, audio line-in, and mobile devices.

In addition to its audio processing functions, AK4687EQ has a built-in speaker driver output to directly drive small speakers. It also supports stereo headphone output with a sophisticated headphone amplifier and low noise playback. The device also supports an integrated analog-to-digital converter (ADC) for recording purposes.

The AK4687EQ has a wide range of applications in audio systems and systems requiring high dynamic range, wide frequency range, and low power consumption. It is used in various consumer audio applications such as car audio systems, portable audio players, headphones, and digital hearing aids. It also is used in professional sound reinforcement systems, such as PA systems, loudspeakers, and sound boards.

The AK4687EQ works on the principle of converting analog audio signals into digital audio signals to enable the digital signal processing (DSP) techniques. The incoming analog signal is sampled at regular intervals and converted into a 16-bit PCM ( Pulse Code Modulation) signal. The PCM data is then processed using the AK4687EQ’s integrated signal processing algorithms. After the processed data is converted back to an analog signal, it can be fed into an external amplifier and transducer for listening.

The AK4687EQ processor integrates audio effects, such as chorus, reverb, delay, and tone controls, to provide a wide range of audio effects. It also includes an embedded digital audio playback engine for streaming audio from online sources. Advanced features such as surround sound, auto-volume control, dynamic range compression, and active noise reduction are implemented in AKM processors.

In summary, AK4687EQ is a versatile digital sound processor product for a variety of applications. Its wide dynamic range, low noise floor, and low power consumption make it suitable for various audio application requirements. The integrated sigma-delta modulator, speaker driver output, headphone amplifier, and various audio effects are the advantages of the product. It is used in consumer audio applications such as car audio systems, portable audio players, and headsets, as well as professional sound reinforcement systems, such as PA systems and loudspeakers.

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