MasterHIFI Audio D/A Converter with Headphone Amplifier

The CS43131 combines a next generation, low power audio DAC with a high-fidelity headphone amplifier to provide a superior system-level audio performance without draining battery life. This IC minimizes board space requirements while enabling performance and features to drive design differentiation. The CS43131 can support excellent audio quality with a wide range of headphones. This IC can drive 2 VRMS of output into 600 Ω high impedance headphones with an interchannel isolation of >110 dB, and 30 mW into 32 Ω low impedance headphones. To minimize pre-echos and ringing artifacts, the CS43131 is designed with proprietary digital-interpolation filters that support five selectable digital filter responses. Filtering options include low group delay with pseudo-linear phase and a fast or slow roll-off. Volume matching of the analog output levels and channel mixing enable a seamless transition between the DSD and PCM playback paths. The onboard low noise, ground-centered headphone amplifier provides proprietary AC impedance detection to support headphone fingerprinting to provide a consistent and transparent audio experience for the end user regardless of transducer impedances or frequency responses. The amplifier also supports adaptive post processing for customer bundled and third party headphones/headsets. An integrated auxillary audio input and "click-less" switch is provided for non-high-fidelity use cases.



  • CS43131 is the evolution of the CS43130. Re-defining Audio again
    • Improved output level up to 2 VRMS into 600 Ω headphones
    • Evolved performance: THD+N increased from -108 dB to -115 dB
    • Increased hi-fi DSD playback rate from DSD128 to DSD256
  • Integrated GND-centered, Class H headphone driver
    • Output power
      • 30 mW per channel into 32 ohm load
      • 5 mW per channel into 600 ohm load
  • Advanced 32-bit oversampled multi-bit modulator with mismatch shaping technology
    • Eliminates distortion due to on-chip component mismatch
  • Serial audio input
    • I²S, right-justified, left-justified, DoP, DSD and TDM interface
    • Main or secondary operation
    • Volume control with 0.5 dB step size and soft ramp
    • 44.1 kHz de-emphasis and inverting feature
  • Alternate headphone input
  • Seamless switching between high performance and low power playback
  • VD/VL Supply Voltage = 1.8 V

Parametric Specifications

Channel(s) Out 2
Resolution (bits) 32
Dynamic Range (dB) 130
THD+N (dB) -115
Sample Rate (kHz) 384
Analog Power Supply (V) 1.8
Digital Power Supply (V) 1.8
Operational Power Consumption (mW) 6.25-40.2
Output Level (Vrms) 2
Package 40 QFN;


For more information about Cirrus Logic's Hi-Fi product line, visit the Hi-Fi Audio page.

Technical Documents

CS43131 Product Data Sheet

Dec 16, 2022, DS1155F2 : 5.2 Mb

CDB43131-GBK Kit Manual

Nov 2, 2018, DS1155V2DB1 : 3.4 Mb

CS43131 REV B1 Schematic and Layout

Nov 2, 2018, REV B1 : 1.6Mb

Design Resources

CDB43131K Evaluation Board Data Sheet

Sep 18, 2018, DS1155V2DB2 : 3.6 Mb

WAN-0118 Guidelines

Sep 1, 2014, WAN_0118 rev 2.5 : 740 kb

Software and Tools


Jan 14, 2021, v3.12.0.5 : 43.2 Mb

Device Pack for CS43131

Nov 8, 2018, v1.0.48 : 15.5 Mb


Comprehensive Solutions