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Fourth gen audio DAC offers ground-centred line drivers

Posted: 16 Jul 2010     Print Version  Bookmark and Share

Keywords:DAC  stereo line driver  audio application  consumer home 

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

The CS4354 uses an on-chip charge pump to generate a negative supply and outputs a ground-centred, 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 per cent 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 multi-bit 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 centred 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 Rs.37.83 ($0.81) in 10ku quantities.

- Ismini Scouras
EE Times

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