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CS47L24

Ultra Compact, Low-Power Smart Codec with Dual-Core DSP
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CS47L24 Overview

The CS47L24 combines an advanced 300 MIPS dual core DSP with a high performance audio hub codec embedded with SoundClear® software technology to add “voice” to mobile, wearable and smart home devices. SoundClear Control enables ‘always on’ voice with the option of local command and control — all at power levels that are kind on battery life. This highly integrated IC features a variety of power efficient, fixed function, audio-processing blocks supported by a fully flexible, all digital mixing and routing engine with sample rate converters to provide design flexibility across a variety of platforms. The power, clocking and output driver architectures of the CS47L24 are designed to maximize battery life for voice, music and standby modes using 1.8 V and 1.2 V external supplies.

CIRRUS®
CIRRUS ROCKS®
ENGINEERED TO ROCK®
INNOVATION THAT ROCKS®

Product Features

  • 300 MIPS, 300MMAC dual-core audio-signal processor

  • Enhanced DRE processing (eDRE) for 121 dB SNR

  • Fixed function signal-processing functions

  • Multi-channel asynchronous sample-rate conversion

  • Integrated multi-channel 24-bit hi-fi audio hub codec

  • Four digital microphone inputs (two stereo interfaces)

  • Stereo headphone/earpiece/line output driver

  • Mono 2 W Class D speaker output driver

  • Three full digital audio interfaces

  • Flexible clocking, derived from MCLKn or AIFn

  • Two low power frequency-locked loops (FLLs) support reference clocks down to 32 kHz

  • Configurable functions on two GPIO pins

  • Integrated regulators and charge pumps

  • Small WLCSP package, 0.4-mm ball array

Parametric Specifications

Analog Input TypeSingle-ended; Differential
Analog Output TypeSingle-ended; Differential
Channels In4
Channels Out0
Control InterfaceSPI/I²C
DAC Dynamic Range (dB)115
DAC THD+N (dB)-92
Sample Rate (kHz)8-192
Analog Power Supply (V)1.8
Digital Power Supply (V)1.2-1.8
Logic Power Supply (V)1.8-3.3
Power Consumption (mW)3.2-833
DSP IncludedYes
Features2 cores, 300 MIPS, 460kB memory, Headphone output, Earpiece Output, Mono Speaker Output
Package63 WLCSP

Design Resources

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Evaluation Boards

  • CS47L24 Evaluation Board (CDB47L24-M-1)

    Order Sample
  • CDB6271-2 (Lochnagar 2)

    CDB6271-2 (Lochnagar 2)

    Cirrus Logic’s CDB6271-2 ('Lochnagar 2') is an evaluation and development platform with support for interchangeable daughter cards. It is designed to provide a variety of audio inputs and outputs to Cirrus Logic devices and to allow for configuring and programming them in a variety of possible use cases. The CDB6271-2 is designed to operate with the WISCE™ Development Tools Suite, which is a prerequisite for use of the board. The CDB6271-2 ('Lochnagar 2') support can be added to WISCE by installing the Device Pack, which also installs the necessary audio and communication drivers.

    Order SampleUser Guide

Software Packages

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