Cirrus Logic, Inc. SmartHIFI Smart Codec With Advanced Audio Features for Mid-Tier Smartphones CS47L15

The CS47L15 is a highly integrated, low-power audio hub designed for smartphones, tablets, and wearable devices. It features a 150 MIPS audio-signal processor with always-on voice trigger capability and supports advanced audio processing functions such as wideband noise reduction, acoustic echo cancellation, and speaker protection algorithms. The codec includes a multichannel 24-bit audio hub with a 98-dB signal-to-noise ratio for microphone input and a 127-dB SNR for headphone playback, ensuring high-fidelity audio performance. The device supports up to four analog or digital microphone inputs and provides a stereo headphone driver capable of delivering 30 mW into a 32-Oc load with low total harmonic distortion. It also features three digital audio interfaces that accommodate standard sample rates from 8 to 192 kHz, along with automatic sample-rate detection for seamless voice-call transitions. The CS47L15 can operate independently of a host processor, thanks to its SPI master interface for autonomous boot-up and configuration. Power management is optimized for battery life, with low-power modes and configurable wake-up events. The device operates from 1.8 V and 1.2 V supplies, with additional support for a Class D speaker driver. Its compact WLCSP package and advanced accessory detection functions make it suitable for a variety of portable audio applications.