Codecs record and play back simultaneously

A novel range of audio codecs can play back and record audio at the same time, at different sampling rates.

A novel range of audio codecs can play back and record audio at the same time, at different sampling rates.

The new WM9710 range of high-performance stereo audio codecs, address portable applications like PDAs, smartphones and tablet PCs, which require simultaneous audio playback and record at different sample rates.

Wolfson's WM9710 conforms to AC97 specification, Rev 2.2, eliminating the need for an additional PLL and a sample rate conversion algorithm.

As a result, in portable applications, battery life is extended and processing speed is increased, as the CPU is not burdened with sample rate conversion.

The WM9710 performs full-duplex 18bit codec functions and supports variable sample rates from 8 to 48kHz with high signal-to-noise ratio.

Analogue mixers are included to mix external (additional audio) signals into the playback or record path.

Mono inputs and outputs are provided to connect to an external voice codec.

The on-chip headphone driver can distinguish between a stereo headphone and a mono headset and route the signals accordingly.

This high-quality audio stereo codec allows designers to easily integrate phone functions with other audio functions such as MP3 playback and voice recording.

The WM9710 operates on 3, 5 or mixed 3/5V supplies and is available in either a leadless, chip-scale QFN package with 7mm body size or 48-pin TQFP.

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