CS4234 Datasheet PDF - Cirrus Logic

General Description
   The CS4234 is a highly versatile CODEC that combines 4 channels of high performance analog to digital conversion, 4 channels of high performance digital to analog conversion for audio, and 1 channel of digital to analog conversion to provide a nondelayed audio reference signal to an external Class H tracking power supply. If not used to drive a tracking power supply, the 5th DAC can instead be used as a standard audio grade DAC, with performance specifications identical to that of the 4 DACs in the audio path. Additionally, the CS4234 includes tunable group delay for each of the 4 audio DAC paths to provide lead time for the external switch-mode power supply, and a nondelayed path into the DAC outputs for input signals requiring a low-latency path to the outputs.

DAC Features
✦ Advanced multibit Delta–Sigma modulator
✦ 24-bit resolution
✦ Differential or single-ended outputs
✦ -109 dB dynamic range (A-weighted)
✦ -90 dB THD+N
✦ 2 Vrms full-scale output into 3-k AC load
✦ Rail-to-rail operation
✦ Programmable group delay in 4-channel audio output path

ADC Features
✦ Advanced multibit Delta–Sigma modulator
✦ 24-bit resolution
✦ Differential inputs
✦ -105 dB dynamic range (A-weighted)
✦ -88 dB THD+N
✦ 2 Vrms full-scale input

System Features
✦ TDM, left justified, and I2S serial inputs and outputs
✦ Nondelayed low-latency path
✦ Supports sample rates up to 96 kHz

Class H Controller Features
✦ Can be used with any integrated Class AB amplifier IC or discrete amplifier solution.
✦ Increases efficiency of Class AB amplifiers
✦ Creates audio tracking reference signal for external switch-mode power supply
✦ Internal envelope tracking of up to 32 channels
✦ Input path for externally generated tracking signal

Common Applications
✦ Discrete Class H automotive audio amplifiers
✦ Automotive head units with internal Class H amplifiers
✦ Audio mixing consoles
✦ Audio effects processors