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Stereo codec targets portable apps

Austin, Texas — This low-power stereo codec from Cirrus Logic Inc. operates from a single 1.8-V power supply while delivering 46 mW into stereo 16Ω headphones.

This highly integrated 24-bit, 96-kHz stereo codec is based on a multibit Delta-Sigma architecture, which allows infinite sample rate adjustment between 4 kHz and 100 kHz.

The CS42L51 is the first in a new line of products focused on analog and mixed signal ICs for power-sensitive, battery-operated applications such as hard-disc drive (HDD) and flash-based music players, personal media players, mini-disc players/recorders, PDAs, smart phones, digital camcorders and digital voice recorders.

The CS42L51 delivers strong analog audio performance while providing system designers with a device that improves battery life, reduces end product form factors and simplifies the recording and playback of digital audio, said Jason Rhode, vice president and general manager, Mixed-Signal Audio Products Division, Cirrus Logic.

By generating its own on-chip negative power supply voltage, the CS42L51 provides ground-centered outputs, which eliminate costly, space consuming DC blocking capacitors, Rhode said.

In addition to a high-quality multibit Delta-Sigma based analog-to-digital converter (A/D converter) and digital-to-analog converter (D/A converter), the CS42L51 integrates a 3:1 stereo input multiplexer, programmable gain amplifier, a stereo microphone preamplifier and low-noise bias supply, automatic level control, and a digital signal processing engine, which offers features such as bass/treble boost, limiter and a tone generator. Its analog stereo outputs can be configured as HP or line out, with digital volume and mute output control.

 
 
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The CS42L51 is currently sampling, with volume production expected by the end of the summer. The codec is available in a 32-lead QFN package and is priced at $3.95 in quantities of 1,000. Click here for the CS42L51 data sheets.

Cirrus Logic , 1-800-625-4084, www.Cirrus.com.

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