Cirrus Logic, Inc. 104 dB, Stereo Codec with Mux and S/PDIF Transmitter CS4265

The CS4265 is a stereo audio codec featuring an integrated five-chip design and S/PDIF output to provide premium audio performance. An analog front-end provides a 2:1 input mux and a programmable gain amplifier (PGA) capable of ±12 dB of analog gain in 0.5 dB step sizes with zero-crossing and click-free transitions to maintain superior audio quality. One pair of inputs has a dedicated microphone pre-amplifier in its path to provide 32 dB of gain, and a low noise microphone bias supply is also available. The stereo analog-to-digital (A/D) and digital-to-analog (D/A) conversion is based on multibit Delta Sigma architecture. A synchronous S/PDIF (IEC60958-3) digital audio transmitter is integrated to provide additional design flexibility and to lower system cost. Features Complete stereo codec Integrated 192 kHz S/PDIF transmitter 24-bit conversion System sampling rates up to 192 kHz Advanced multibit Delta Sigma architecture 104 dB dynamic range -95 dB ADC THD+N -90 dB DAC THD+N 2:1 input mux IEC60958-3 transmitter Programmable gain amplifier: ±12 dB gain, 0.5 dB step sizes with zero crossing Microphone pre-amp with 32 dB gain and low-noise bias supply Digital volume control Popguard® technology for control of clicks and pops Single-ended inputs and outputs 3.3 V or 5.0 V power supply Support for direct interface to logic levels from 1.8 V to 5 V Overflow detection High-pass filter with defeat Package: 32-pin QFN, lead-free assembly