Audio Sample-rate converter integrates digital audio receiver, supports DVD, CD and broadcast formats.

The AK4122 is an audio sample rate converter with a built-in digital audio interface. This single-chip solution can accept digital audio data over S/PDIF or AES/EBU and change its sample rate. Sample rates from 8KHz up to 96KHz are supported.

Sample-rate converter integrates digital audio receiver, supports DVD, CD and broadcast formats.

New AKM Chip Simplifies Programming and Support for Consumer and Professional Audio Systems.

San Jose, California (PRWEB) August 4, 2003 — Asahi Kasei Microsystems Semiconductor, Inc. (AKM), a leading supplier of audio ICs for professional and consumer markets today introduced the AK4122, a 2-channel 96 kHz asynchronous sample rate converter with a built-in Digital Audio Interface (S/PDIF Receiver) for DVD, digital TV, PC and car Audio/Video applications.

The AK4122 two-channel 96 kHz Asynchronous Sample Rate Converter (SRC) that provides a combination of standard audio input ports plus a digital audio interface for DVD recorders and other audio/video equipment.

Audio is typically converted into digital data at 32KHz, 44.1KHz (CD), 48KHz, (DVD), or 96KHz (DVD-Audio) sample rates. Digital signal processors usually use a single sample rate when processing audio. In order to bridge the gap between signal processing and digital audio, sample rate converters are used. The AK4122 asynchronous sample rate converter can accept digital audio via standard DSP/I2S interfaces or S/PDIF or AES/EBU interfaces. The integration of the AES/EBU interface saves circuit board space and reduces system cost.

The AES/EBU section of the AK4122 offers the same high performance as the currently marketed AK4112B, 96kHz 24-Bit DIR including a four-input (4:1) Selector. The AK4122 can also detect non-PCM data streams like DTS and AC-3, while a CD Q subcode buffer allows the chip to easily read CD data.

The AK4122s built-in PLL eliminates the need to provide an external master clock, and the SRC section provides two audio input ports and one output port.

Price and Availability
Available in an extremely small 48-pin LQFP package, AK4122 engineering samples are available now. The part is priced at $4.21 in 1K quantities. Evaluation boards and samples are available now directly from AKM.

About AKM
Asahi Kasei Microsystems (AKM) is a worldwide leader in CMOS mixed-signal ICs for the personal computer, professional audio, consumer electronics, automotive, and cellular phone industries. AKM is a subsidiary of the Asahi Kasei Corporation. a diversified technology, manufacturing and services company. To obtain more information, contact AKM Semiconductors, 2001 Gateway Place, Suite 650 West, San Jose, CA 95110 or call toll free at (888) 256-7364 or 408-436-8580. Visit the company's Web site at http://www.akm.com.