ADCs simplify stereo audio design

Edited by the Electronicstalk editorial team Feb 14, 2006

Two new stereo analogue-to-digital convertors target a variety of consumer and automotive audio applications.

Extending its expansive portfolio of analogue and mixed-signal audio convertor integrated circuit products, Cirrus Logic has introduced two new stereo analogue-to-digital convertors (ADCs) targeted for a variety of consumer and automotive audio applications such as set-top boxes, digital televisions, DVD recorders, audio/video receivers, in-car entertainment and concierge systems and musical instruments.

The new 10-pin ADCs, the CS5343 and CS5344, give OEMs the industry's smallest (less than 15mm2), stereo audio ADCs, while still delivering superior sound quality.

"These new ADCs provide manufacturers a new level of simplicity when designing analogue to digital audio conversion blocks in their products", said Jason Rhode, Vice President and General Manager of Mixed-Signal Audio Division, Cirrus Logic.

"This solution delivers premium audio performance in the industry's smallest form factor without the need for configuration or expensive support circuitry".

"Cirrus Logic has now introduced 12 high-performance audio A/D convertors in the past three years, which gives our diverse customer base one of the most comprehensive product portfolios in the industry".

Based on an advanced multibit delta-sigma architecture, the CS5343 and CS5344 operate from a single 3.3 or 5V power supply and use a proprietary automatic mode selection to eliminate external configuration.

These parts also incorporate a unique input architecture which provides a very high input impedance of 7.5mohm, giving designers improved flexibility to use simple passive input circuits for the stereo line-level inputs, thus reducing design time, board space and cost.

The CS5343 and CS5344 support audio sample rates up to 108kHz and deliver 98dB of dynamic range and -90dB of THD+N.

Consuming only 50mW of power, the CS5343 and CS5344 differ only in the serial audio interface format they support, with the CS5343 supporting the I2S format and the CS5344 supporting left-justified serial data format.

The CS5343 and CS5344 are available in a 10-pin, lead-free TSSOP package and are each priced at $1.35 in quantities of 10,000.