مدار مجتمع (آی سی) آی‌سی صوتی ویژه

Product Attributes

Introduction

The CS4271 is a high-performance, integrated audio CODEC. The CS4271 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 preemphasis technique. Integrated level translators allow easy interfacing between the CS4271 and other devices operating over a wide range of logic levels. An on-chip oscillator eliminates the need for an external crystal oscillator circuit. This can reduce overall design cost and conserve circuit board space. The CS4271 automatically uses the on-chip oscillator in the absence of an applied master clock, making this feature easy to use. Independently addressable high-pass filters are available for the right and left channel of the A/D. This allows the A/D to be used in a wide variety of applications where one audio channel and one DC measurement channel is desired. The CS4271’s wide dynamic range, negligible distortion, and low noise make it ideal for applications such as A/V receivers, DVD-R, CD-R, digital mixing consoles, effects processors, set-top box systems, and automotive audio systems.

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
• High Performance – 108 dB Dynamic Range – -98 dB THD+N
• Single-Ended 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
• Direct Interface with 5V to 2.5V Logic Levels
• Internal Digital Loopback
• On-chip Oscillator
• Stand-Alone or Control Port Functionality
• System Features – Serial Audio Port Master or Slave Operation – Internal Oscillator for Master Clock
• D/A Features – Auto-mute on Static Samples
• -44.1 kHz 50/15 μs De-emphasis Available
• Automatic Dithering for 16-bit Data
• High-pass Filter
• Selectable Auto-mute
• Selectable Interpolation Filters
• Selectable 32-, 44.1-, and 48-kHz De-emphasis Filters
• Configurable ATAPI Mixing Functions
• Configurable Volume and Muting Controls
• Selectable Dithering for 16-bit Data
• Selectable High-pass Filter or DC Offset Calibration

Applications

• A/V receivers
• DVD-R
• CD-R
• digital mixing consoles
• effects processors
• set-top box systems
• automotive audio systems