Wolfson Microelectronics Co., Ltd. recently released a new all-digital audio solution and launched its latest audio hub products WM8996 and WM9082 Class D digital input speaker amplifier. This powerful combination, aimed at the smartphone and tablet market, provides designers with a digital audio subsystem that eliminates the distortion caused by routing analog signals over longer distances. WM9082 is available in a 9-ball CSP package and is now available at a unit price of $ 0.75; WM8996 is available in a 54-pin W-CSP package and is also available now. The unit price for a 1,000-piece order is $ 2.6.
WM8996 is designed for target products that require high-quality voice calls and music playback needs. The device integrates an innovative audio mixing technology, which can easily handle multiple audio routing and parallel use cases, efficiently using the semiconductor space in a compact package. WM8996 has built-in Wolfson's superior audio playback quality technology with ultra-low power consumption, which provides enhanced HD audio quality while significantly extending battery life. WM8996 also includes a digital audio interface, which uses pulse density modulation (PDM) protocol to connect digital speaker amplifiers like the new WM9082, as well as digital microphones like WM7210 and WM7220.
WM9082 is a high-performance Class D speaker amplifier that can provide PDM input capability. It is a perfect accessory for WM8996. The audio output provides market-leading 100dB signal-to-noise ratio performance, low out-of-band noise spectrum can reduce radiated electromagnetic interference; this small device (2.3mm2) can provide up to 2.5W drive for a 4Ω speaker.
The digital audio interface between the WM8996 audio hub and WM9082 Class D speaker driver provides excellent noise immunity, eliminating the input filter components required by traditional analog amplifiers. This PDM interface format reduces the complexity of the structure and shape in the design of the end product, and does not affect the audio quality, because it provides the option of digitally converting data. This avoids distortion caused when routing analog signals over longer distances. Therefore, the PDM interface between devices simplifies the design and significantly reduces time to market. This solution also ensures significant savings in PCB area and bill of materials (BOM) costs by reducing the various discrete components that are normally needed to support an audio subsystem.
Eddie Sinnott, Director of Product Portfolio at Wolfson, commented: "The groundbreaking mixing technology included in WM8996 enables efficient use of silicon chips. When combined with WM9082, this all-digital audio solution for multimedia devices expands us The combination of the audio hub can ensure the improvement of the functions, performance, design convenience and cost provided by the digital connection system. In addition, when combined with a series of Wolfson digital MEMS microphones such as WM0010 and audio-centric digital When combined with a signal processor (DSP), it can provide a complete solution for sound enhancement and noise reduction algorithms in the audio signal path. "
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