Smart Codec with Low Power Audio DSP

The CS47L35 combines an advanced DSP feature set with a highly integrated audio codec to deliver the Cirrus Logic voice and audio experience for mid-tier smartphones. The CS47L35 features a 450 MIPS three-core audio signal processor with a high performance 4/3 channel, 24-bit high-fidelity codec embedded with SoundClear® software technology to support multiple concurrent audio functions including multi-microphone wideband noise reduction, speaker protection, acoustic echo cancellation (AEC), low power single and multi-trigger word detection and engine support, and advanced speech and media enhancement.


Smart Codecs, Audio DSPs


  • 450 MIPS, 450 MMAC multi-core audio-signal processor
  • Sensor hub connectivity, with event time-stamp functions
  • Programmable wideband, multi-mic audio processing
  • Four ADCs, 100 dB SNR microphone input, three DACs, 122 dB SNR headphone playback
  • Integrated multichannel 24-bit hi-fi audio hub codec
  • Up to six analog or four digital microphone inputs
  • Stereo headphone/earpiece/line output driver
  • Earpiece, speaker and digital (PDM) output interfaces
  • Three full digital audio interfaces
  • Flexible clocking, derived from MCLKn, AIFn or SLIMbus
  • Low power frequency-locked loops (FLLs) support reference clocks down to 32 kHz
  • Configurable functions on up to 16 GPIO pins
  • Integrated regulators and charge pumps
  • Small WLCSP package, 0.4-mm ball array

Parametric Specifications

DACs 3
ADCs 4
DAC Dynamic Range (dB) 120
ADC Dynamic Range (dB) 122
DAC THD+N (dB) -85
ADC THD+N (dB) -88
Sample Rate (kHz) 8-192
Package 102 WLCSP

Technical Documents

CS47L35 Product Bulletin

May 11, 2017, Jul 2015 : 456 Kb

CS47L35 Product Data Sheet

May 11, 2017, DS1085F2 : 8.7 Mb

Software and Tools

Device Pack for CS47L35

Sep 26, 2017, v2.2.9 : 7.5 Mb


Comprehensive Solutions