مدار مجتمع (آی سی) آی‌سی صوتی ویژه

Product Attributes

Introduction

The CS4265 is a highly integrated stereo audio CODEC. The CS4265 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. A 2:1 stereo input multiplexer is included for selecting between line-level or microphone-level inputs. The microphone input path includes a +32 dB gain stage and a low noise bias voltage supply. The PGA is available for line or microphone inputs and provides gain or attenuation of ±12 dB in 0.5 dB steps. The output of the PGA is followed by an advanced 5th-order, multi-bit delta sigma modulator and digital filtering/decimation. Sampled data is transmitted by the serial audio interface at rates from 4 kHz to 192 kHz in either Slave or Master Mode. The D/A converter is based on a 4th-order multi-bit delta sigma modulator with an ultra-linear low-pass filter and offers a volume control that operates with a 0.5 dB step size. It incorporates selectable soft ramp and zero crossing transition functions to eliminate clicks and pops. Standard 50/15 μs de-emphasis is available for a 44.1 kHz sample rate for compatibility with digital audio programs mastered using the 50/15 μs pre-emphasis technique. Integrated level translators allow easy interfacing between the CS4265 and other devices operating over a wide range of logic levels.

Features

• Multi-Bit Delta Sigma Modulator
• 104 dB Dynamic Range
• -90 dB THD+N
• Up to 192 kHz Sampling Rates
• Single-Ended Analog Architecture
• Volume Control with Soft Ramp 0.5 dB Step Size Zero Crossing, Click-Free Transitions
• Popguard Technology – Minimizes the Effects of Output Transients
• Filtered Line-Level Outputs
• Selectable Serial Audio Interface Formats Left-Justified up to 24-bit I²S up to 24-bit Right-Justified 16-, 18-, 20-, and 24-bit
• Selectable 50/15 μs De-Emphasis
• Stereo 2:1 Input Multiplexer
• Programmable Gain Amplifier (PGA) – ± 12 dB Gain, 0.5 dB Step Size Zero Crossing, Click-Free Transitions
• Pseudo-Differential Stereo Line Inputs
• Stereo Microphone Inputs +32 dB Gain Stage Low-Noise Bias Supply
• High-Pass Filter or DC Offset Calibration
• Synchronous IEC60958-3 Transmitter – Up to 192 kHz Sampling Rates 75 Ω Drive Capability
• Serial Audio Data Input Multiplexer
• Internal Digital Loopback
• Supports Master or Slave Operation
• Mute Output Control
• Power-Down Mode Available for A/D, D/A, CODEC, Mic Preamplifier
• +3.3V to +5 V Analog Power Supply
• +3.3V to +5 V Digital Power Supply
• Direct Interface with 1.8V to 5 V Logic Levels
• Supports I²C Control Port Interface