Cirrus Logic Introduces Audio Digital to Analog Converter

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Cirrus Logic introduces the CS4350, a complete stereo audio digital-to-analog converter that delivers high audio quality and is designed to be simple. The product's master clock based on an on-chip phase-locked loop (PLL) provides 24-bit resolution, sample rates up to 216 kHz, and a dynamic range of 108 dB. With its on-chip PLL, the CS4350 is ideal for audio-related system clock applications, including set-top boxes, digital TVs, personal video recorders, DVD players and recorders, audio/video receivers, and host devices, telematics, and in-car entertainment systems. Automotive applications.

The CS4350 features an advanced multi-bit delta-sigma architecture that provides excellent dynamic range and improved out-of-band noise. With an integrated PLL, the CS4350 does not require an external master clock to be connected to the board via a synchronous left-right clock signal, unlike a video clock or other high-speed clock source. As a result, the CS4350 significantly reduces interference and clock jitter sensitivity. This feature helps system designers develop high performance and simple digital to analog converters.

Jason Rhode, vice president and general manager of Cirrus Logic, said: "On-chip PLLs mean that OEMs can more easily develop products with high-quality audio without the need for external clock components. Many competitors simply integrate PLLs into digital-to-analog converters. However, because of the connection to high-speed video clocks, designers still face challenges in minimizing system noise caused by high-speed clocks."

To further simplify product design, proprietary technologies such as automotive sample rate detection require each device to be configured in the appropriate operating mode. In addition, Cirrus Logic's patented PopGuardTM technology can also be used to suppress clicks and clicks, which are often associated with power cycling. The CS4350 supports all standard PCM audio interfaces and TDM interface formats, allowing daisy chaining to connect up to four CS4350s and receive 8-channel digital audio on a single stream. Single-ended or differential output architectures provide more design flexibility.

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