30 W Class-D Amplifier with Integrated ADC, Sample Rate Convertor and Audio Processor.

The CS4525 is an innovative, highly integrated single-chip Class D amplifier for the rapidly expanding audio market.

The CS4525 is notable because it integrates a stereo analog-to-digital converter, sample-rate converter, digital audio processor and a complete 30-watt Class D amplifier, including the controller and power stage.

The CS4525 supports both incoming analog and digital audio signals, and its highly efficient power stage eliminates the need for a heat sink in system designs. The IC includes an on-board digital audio processor, offering such features as parametric equalization, auxiliary output for lip-sync delay and bass management.

In addition to stereo configurations that provide 15 watts per channel output, it can support 2.1-channel configurations (2 X 7.5 watts per channel plus 1 X 15 watts) as well a low-frequency effects configuration (1 X 30 watts).

Based on a 24-bit multibit Delta Sigma architecture, the CS4525 features good audio quality with a dynamic range of 100 dB.

Also, its built-in sample-rate converter simplifies designs with the ability to manage a variety of incoming audio signals at different frequencies (eg. PCM stereo, audio from DVD, etc.) while eliminating clock-jitter effects.

Cirrus Logic has also incorporated patent-pending thermal warning and fold back technology, which scales back output levels automatically if internal chip temperatures produce excessive heat.