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Stereo codec targets portable apps

Posted: 21 Jul 2005 ?? ?Print Version ?Bookmark and Share

Keywords:cirrus logic? stereo codec? cs42L51?

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

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

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, VP and GM, 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," added Rhode.

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.

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.

- Bettyann Liotta


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