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