Digital amplifiers designed for manufacturability

11 August 2004 Analogue, Mixed Signal, LSI Integrated Solutions

Cirrus Logic has introduced a family of Class D digital amplifier products that it claims will give OEMs an easier-to-manufacturer product compared to previous generations of Class D technology. In addition to this it touts improved audio quality. The CS44600 and CS44800 are tailored for next-generation home theatre products such as audio/video receivers and DVD receivers. According to Cirrus the devices represent a major breakthrough in digital amplifier technology, since it has been able to mitigate audio noise through its patented power-supply noise rejection technology. Supported by a full 7.1 channel reference design, the six-channel CS44600 and the eight-channel CS44800 have technology enhancements that will help enable system designers lower costs while simultaneously improving audio quality. The chips feature an integrated sample-rate converter that minimises the effects of clock jitter, enabling high-quality sound with a system dynamic range of greater than 100 dB, as well as 'Popguard' technology, which minimises the clicks and pops often associated with single-ended outputs.

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