General Description

The CS4272 is a high-performance, integrated audio CODEC. The CS4272 performs stereo analog-to-digital (A/D) and digital-to-analog (D/A) conversion of up to 24-bit serial values at sample rates up to 192 kHz.

The D/A offers a volume control that operates with a 1 dB step size. It incorporates selectable soft ramp and zero crossing transition functions to eliminate clicks and pops.

The D/A’s integrated digital mixing functions allow a variety of output configurations ranging from a channel swap to a stereo-to-mono downmix.

Standard 50/15 µs de-emphasis is available for sampling rates of 32, 44.1, and 48 kHz for compatibility with digital audio programs mastered using the 50/15 µs pre-emphasis technique.

D/A Features

• High Performance

– 114 dB Dynamic Range

– -100 dB THD+N

• Up to 192 kHz Sampling Rates

• Differential Analog Architecture

• Volume Control with Soft Ramp

– 1 dB Step Size

– Zero Crossing Click-free Transitions

• Selectable Digital Filters

– Fast and Slow Roll Off

• ATAPI Mixing Functions

• Selectable Serial Audio Interface Formats

– Left Justified up to 24-bit

– I2S up to 24-bit

– Right Justified 16-, 18-, 20-, and 24-Bit

• Control Output for External Muting

• Selectable 50/15 µs De-emphasis

A/D Features

• High Performance

– 114 dB Dynamic Range

– -100 dB THD+N

• Up to 192 kHz Sampling Rates

• Differential Analog Architecture

• Multi-bit Delta Sigma Conversion

• High-pass Filter or DC Offset Calibration

• Low-Latency Digital Anti-alias Filtering

• Automatic Dithering of 16-bit Data

• Selectable Serial Audio Interface Formats

– Left Justified up to 24-bit

– I2S up to 24-bit

System Features

• Direct Interface with 5V to 2.5V Logic Levels

• Internal Digital Loopback

• On-chip Oscillator

• Stand-Alone or Control Port Functionality