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

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 multichannel 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.



Smart Codecs


  • 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

DACs 1
ADCs 4
DAC Dynamic Range (dB) 108
DAC THD+N (dB) -93
ADC THD+N (dB) -87
Sample Rate (kHz) 0-192
Analog Power Supply (V) 1.8
Digital Power Supply (V) 1.2
Package 61 WLCSP

Technical Documents

CS47L63 Product Data Sheet

Jun 1, 2021, DS1249F2 : 6.6 Mb

Software and Tools

CS47L63 Setup

Jun 11, 2021, RevA 1.0.57 : 7.5 Mb


Comprehensive Solutions