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CS47L63

Low-Power Audio DSP with Microphone Interface and Mono Differential Headphone Driver
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CS47L63 Overview

The CS47L63 is a high-performance low-power audio DSP for earbud headphones and other portable audio devices. The CS47L63 combines a programmable Halo Core DSP with a variety of power-efficient fixed-function audio processors. The high-performance DAC and differential output driver are optimized for direct connection to the external headphone load. The Halo Core DSP is integrated within a fully flexible, all-digital mixing and routing engine with sample-rate converters, for wide use-case flexibility. The CS47L63 supports up to four analog inputs or up to four PDM digital inputs. Low-power input modes are available for always on (e.g., voice-trigger) functionality using either analog or digital input. Two digital audio serial ports are provided, each supporting multi-channel operation at sample rates up to 192 kHz.  Two FLLs are integrated, providing support for a wide range of system-clock frequencies. The CS47L63 is configured using a control interface which supports I²C and SPI modes of operation. The device is powered from 1.8 V and 1.2 V supplies.

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

Product Features

  • Mono differential output headphone driver

  • Audio playback up to 192 kHz sample rate

  • SNR 99 dB, mic input @ 48 kHz

  • Headphone playback 120 dB SNR

  • Total harmonic distortion and noise –93 dB (THD+N)

  • 4 analog microphone (DMIC) inputs

  • Flexible clocking, low frequency-locked loops (FLLs) support reference clocks down to 32 kHz

  • Up to 12 GPIO pins

  • Low power 10 µA sleep mode

  • Powered from 1.8 V and 1.2 V supplies

  • Small WLCSP package, 0.4 mm staggered 61-ball array

Parametric Specifications

Analog Input TypeSingle-ended; Differential
Analog Output TypeSingle-ended; Differential
Channels In4
Channels Out1
Control InterfaceSPI/I²C
ADC Dynamic Range (dB)99
DAC Dynamic Range (dB)108
ADC THD+N (dB)-87
DAC THD+N (dB)-93
Sample Rate (kHz)8-192
Analog Power Supply (V)1.8
Digital Power Supply (V)1.2
Logic Power Supply (V)1.8-3.3
DSP IncludedYes
Target MarketConsumer
Features3 cores, 450 MIPS, 672kB memory, Master Hi-Fi Headphone/Earpiece Output/Line outputs, Mono Speaker output, SLimbus, digital audio, SPI and I²C interfaces, Multiple GPIO pins
Package61 WLCSP

Design Resources

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Evaluation Boards

  • 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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