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WM8750CBLGEFL Application Field and Working Principle

The WM8750CBLGEFL is a transceiver chip, designed to bridge audio between an analog signal and a digital signal. It works in a serial-input/ parallel-output format to maximize data throughput speed, and is capable of up to 96 kHz sample rate. With its low power consumption of only 1.3 mA, it is ideal for use in battery-powered applications such as portable audio devices, such as digital audio players, cell phones and portable digital music player.

Application Field

The WM8750CBLGEFL is a low-power, integrated audio transceiver, which includes a serial digital input interface, a low power aDAC and two pair of low power stereo audio outputs. Primarily, the WM8750CBLGEFL is designed for digital cell phones and portable audio devices. It is suitable for any application that requires a reduction in digital input power without compromising audio quality. Applications that require single-ended analog signals, such as audio systems, multimedia displays and television would also benefit from the WM8750CBLGEFL’s low power design.

Technologies

The WM8750CBLGEFL is a low-power integrated audio transceiver that uses Delta-Sigma (ΔΣ) modulation, a powerful data-conversion technology to achieve low-noise, high-resolution audio performance. It is also equipped with Down Sample Conversion (DSC) technology, which reduces the power consumption of the chip while maintaining audio qualities.

Working Principle

The WM8750CBLGEFL has two outputs – a serial digital output for passing digital signals, and a parallel-output consisting of eight analog channels. The eight analog channels of the parallel output each output a 2-bit resolution stereo audio signal, which is converted from the original digital signal into an analog signal by the Delta-Sigma (ΔΣ) modulation process. This process reduces the total number of bits needed to represent the audio signal, thereby reducing the power consumption of the chip. Moreover, the Down Sample Conversion (DSC) precision filtering technology helps to reduce the noise generated during the conversion process.

Implementation

The WM8750CBLGEFL is capable of supporting different input formats, including PCM, APCM, G.711, G.711A, μ-law and A-law. In addition, it supports multiple sampling rates, such as 48 kHz, 44.1 kHz, 32 kHz, 24 kHz and 16 kHz. Moreover, the WM8750CBLGEFL supports mono, dual-mono, stereo and multi-channel (up to 8 channels) audio formats, so it is suitable for a wide range of audio applications. It comes with an integrated decimation filter, which helps reduce the total harmonic distortion of the audio signal. Finally, the WM8750CBLGEFL has advanced audio features such as soft mute, power-on mute and low-delay digital audio output, making it ideal for audio applications.

Conclusion

The WM8750CBLGEFL is an integrated audio transceiver designed for digital cell phones and portable audio devices. It features a low-power, 2-bit Delta-Sigma (ΔΣ) modulator, and is equipped with Down Sample Conversion (DSC) technology and an integrated decimation filter. This makes it ideal for any application that requires a reduction in digital input power without compromising audio quality. Additionally, the WM8750CBLGEFL supports a variety of audio formats, making it perfectly suited for a wide range of audio applications.

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