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.

See related block diagram

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,

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