Low power codec lifts stereo audio experience in mobile apps

September 29, 2016 // By Graham Prophet
Cirrus Logic’s CS47L90is a ‘smart’ codec aimed at primarily at smartphones; it enables “always on” voice activation and high-fidelity audio playback, claiming a step change in single-chip audio and voice processing features for mobile applications.

“Always on” voice activation, noise reduction, active noise cancellation, echo cancellation and speaker protection features combine greater voice control over a mobile device with a superior, noise-free audio user experience. The CS47L90 provides SmartHIFI audio playback; SmartHIFI from Cirrus Logic is a combination of DSP processing and high-performance analogue circuits to deliver an audio experience typically associated with high-end audio equipment, now optimized for mobile audio playback. Low power consumption, both in standby and operational modes, also enables significant battery life savings.

 

“The ability to wake up and control your mobile device using nothing but your voice is a rapidly growing capability that consumers expect from their smartphones,” said Carl Alberty, vice president of marketing, Cirrus Logic. “Our products make this always on user experience work effectively in any environment. We combine ultra-low power sensing and voice detection with the algorithms needed to ensure that voice-recognition commands are executed accurately, without compromising performance or battery life.”

 

The CS47L90 is supported on multiple application processor platforms, enabling a consistent feature set and high performance capability across a wide variety of handsets from leading OEMs. A variety of interfaces allows for integration with all of the key components in the complex architectures of the latest mobile devices, including baseband and applications processors, wireless audio transceivers, analogue or digital MEMS microphones and boosted speaker amplifiers. The devices support popular voice-wake trigger engines, including Google Hotword and Sensory TrulyHandsfree. In addition, development tools are available for customers and third-party IP providers to develop custom solutions on the programmable Cirrus Logic DSP core.

 

Supporting 32-bit audio playback and integrating low series resistance and low jitter clock circuits, the CS47L90 is designed to ensure that the hi-fi DAC and headphone amplifier circuits deliver a clean, transparent audio signal with flat frequency response all the way to the output of the headphone.

 

Cirrus Logic; www.cirrus.com