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Audio DAC extends mobile music playback time

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

Keywords:DAC? audio playback time? mobile music?


STMicroelectronics has announced a very high-performance 24bit audio DAC that is intended for the mobile music market and provides 103dB SNR through the whole audio path, while also embedding the company's PTE Playback Time Extender processing scheme to minimize power consumption. The single-chip STw5210 audio solution also integrates power management circuitry to simplify system design and enable direct connection to the battery.

The new DAC, with Line and Headset outputs, meets the increasing demand for mobile music handsets to provide higher audio quality coupled with longer playing time. Normally an increase in quality means increased power consumption, due to the additional processing required. However, the STw5210 embeds a PTE block, allowing music to be played autonomously, driven by the phone's 32kHz clock while the rest of the platform is switched into a power-saving state. Overall, power consumption is reduced significantly, therefore increasing battery life and playback time without compromising audio quality.

Easy system implementation, minimum BOM and a very small footprint are ensured by integrated power management, eliminating the need for an external voltage regulator, and the built-in 50mW headset amplifier, which operates without coupling capacitors.

For more advanced multimedia smart phones, the STw5210 is also a match for ST's STn8810/8815 Nomadik multimedia processor family and its companion STw4810/4811 power management unit, as well as the TS4962 high-efficiency Class D audio power amplifier for loudspeaker outputs. The chip is also suited for any mobile music application based upon competitive companion devices, but especially in mobile phone platforms where playback time is likely to see the greatest increase.

The STw5210 extends ST's wide portfolio of audio DACs and ADCs with enhanced audio performance. The chip's high level of integrationincluding the PTE function and power managementis made possible by ST's 0.13?m analog CMOS process.

Samples of the STw5210 are available to lead customers, with volume production planned for March 2008. It is packaged in a 4mm x 4mm x 1.2mm TFBGA40, with 0.5mm ball pitch, and a 7mm x 7mm x 1mm in QFN44, with 0.5mm pitch. A 2.6mm x 2.6mm x 0.6mm WLCSP36 packaged version, with 0.4mm ball pitch, is planned for introduction in Q3 2008. The DAC is priced at $1.80 in quantities of 1,000 units.

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