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Batteries get a boost via portable audio codec

Posted: 04 Nov 2008 ?? ?Print Version ?Bookmark and Share

Keywords:codec audio? portable? battery?

Cirrus Logic Inc. has developed a portable audio codec dubbed the CS42L55 that consumes 5.1mW of quiescent power in playback mode and features a bimodal, patent-pending Class H technology. According to Cirrus, the CS42L55 reduces power consumption by nearly 50 percent compared to Class A/B amplification found in portable applications today. The CS42L55 features an ultra small 5x5 mm footprint, and a height of 0.45mm.

Based on 24bit advanced multibit Delta-Sigma technology, the CS42L55 operates from a single 1.8V or 2.5V power supply and can deliver 1 VRMS line output from a 1.8V supply. When driving headphones from the same supply it can deliver 17mW per channel of high-quality, 96dB dynamic range audio. The CS42L55 also provides a 2:1 stereo input multiplexer and a USB master clock input and supports sample rates up to 48kHz. Price is $1.73 in quantities of 10,000. The product is available now in 36-pin xQFN package.

- Ismini Scouras

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