Nuvoton has announced the first device in its new line of emPowerAudio solutions. The WAU8812 is a high-performance, costeffective mono audio codec designed specifically for VoIP phones, hands-free kits and general-purpose speakerphones. It delivers flexibility in terms of performance and optimisation of power consumption, while providing designers with development and test tools that can accelerate time-to-market.
The device features a robust, highfidelity, 24-bit signal architecture delivering 93 dB digital-to-analog converter (DAC) signal to noise ratio (SNR) and 91 dB analog-to-digital converter (ADC) SNR at audio sampling rates from 8 kHz to 48 kHz. The device operates at 6 μA standby current, which reduces power consumption and extends battery life in handheld applications.
The codec reduces external component requirements by integrating a speaker driver, headset driver and a configurable low-noise, microphone-biasing circuit. It also includes two microphone inputs, a single auxiliary input and two dedicated analog outputs. The digital filter block includes a soft mute and a notch filter to reduce out-of-band noise. The IC’s speaker and mono outputs have a dedicated supply of 2,5 to 5,5 volts, which enables increased output power as required. Industry-standard digital interfaces include I²S and PCM with programmable time slot assignments. In addition, the codec is AEC-Q100-compliant for automotive applications.
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