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Low-cost audio DAC packs stereo line drivers

Posted: 15 Jul 2010 ?? ?Print Version ?Bookmark and Share

Keywords:DAC? stereo line driver? audio application? converter?

From Cirrus Logic Inc. comes the CS4354, its lowest-cost 24bit DAC with integrated stereo line drivers.

Targeting consumer home audio applications, such as video game consoles, Blu-ray disc and DVD systems, TVs, STBs and digital media players, the CS4354 is Cirrus' fourth-generation audio DAC with ground-centered 2Vrms line drivers.

The CS4354 uses an on-chip charge pump to generate a negative supply and outputs a ground-centered, 2Vrms filtered line level signal from a single 5V supply. This architecture provides improved low-frequency response and audio quality and offers significant savings in external component costs by eliminating DC blocking capacitors, mute and pop suppression circuits and the need for an expensive high voltage power supply.

According to Cirrus, the CS4354 has 40 percent fewer pins and requires six fewer external capacitors than its third generation DAC in this product category.

The CS4354 supports 24bit conversion and automatic detection of audio sampling rates up to 192kHz. Based on a fifth-order multibit Delta Sigma converter architecture with low latency digital filtering, the CS4354 provides 101dB dynamic range and -86dB THD+N with excellent out-of-band noise performance. The device is powered from a single, +5V supply, supports direct interface to logic levels from +1.5V to +5V and consumes only 50mW of power during operation. It also features a power-on-reset circuit to further simplify system design and combines with the ground centered outputs and on-chip mute to provide a high-performance, affordable audio DAC solution to designers.

Pricing for the CS4354 in 14-pin SOIC package is $0.81 in 10ku quantities.

- Ismini Scouras
EE Times

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