基于CS4354設計的24位立體聲數(shù)模轉(zhuǎn)換技術

The CS4354 is a complete stereo digital-to-analog system including digital interpolation, third-order multi-bit delta-sigma digital-to-analog conversion, digital de-emphasis, analog filtering, and on-chip 2 VRMS line-level driver from a 5 V supply.

The advantages of this architecture include ideal differential linearity, no distortion mechanisms due to resistor matching errors, no linearity drift over time and temperature,

high tolerance to clock jitter, and a minimal set of external components.

The CS4354 is available in a 14-pin SOIC package in Commercial (-40°C to +85°C) grade. The CDB4354 Customer Demonstration Board is also available for device evaluation and implementation suggestions.

These features are ideal for cost-sensitive, 2-channel audio systems including video game consoles, Blu-Ray Disc? and DVD players, set-top boxes, digital TVs, and DAB/DMB devices.

CS4354主要特性：

Advanced Multi-bit Delta-Sigma Modulator

101 dB A-wt Dynamic Range

-86 dB THD+N

Single-ended Ground Centered Analog Architecture

– No DC-blocking Capacitors Required

– Integrated Inverting Charge Pump

– Filtered Line-level Outputs

– 2VRMS Full-scale Output

? Low-latency Digital Filtering

? Supports Sample Rates up to 192 kHz

? 24-bit I2S Input

? +5 V Analog Supply with Integrated Inverting

Charge Pump and Regulator for Core Logic, and +1.8 V to +5 V Interface Power Supplies

? 50 mW Power Consumption

? 14-pin SOIC, Lead-free Assembly

圖1。CS4354方框圖

圖2。CS4354典型連接框圖

CS4354評估板

Evaluation Board for the CS4354

The CDB4354 evaluation board is a dedicated platform designed to facilitate the evaluation of the CS4354 24-bit, stereo D/A converter. Evaluation requires an analog signal analyzer, a digital signal source, and a +5 V power supply. Analog line-level outputs are provided via RCA phono jacks.

The CS8416 digital audio receiver IC provides the system timing necessary to operate the Digital-to-Analog converter and will accept S/PDIF and EIAJ-340-compatible audio data. The evaluation board may also be configured to accept external timing and data signals for operation in a custom user application during system development.

To accommodate various system configurations, several hardware controls and resistor population options are provided. Current sense resistors allow for easy power calculations during system development.

CS4354評估板主要特性：

? Requires Only a Digital Signal Source and a +5 V Power Supply for a Complete Digital-to-Analog Converter System

? Demonstrates Recommended Layout and Grounding Arrangements

? CS8416 Receives S/PDIF, EIAJ-340- Compatible Digital Audio

? Header for External PCM Audio

? Single-ended Stereo Analog Outputs

? Power and S/PDIF Error Indicator LEDs

? Hardware Controls: +5 V/3.3 V select for VL, De-emphasis select

? Current Sense Resistors for CS4354 Supplies (VA and VL)

圖3。CS4354評估板方框圖

圖4。CS4354評估板電路圖：CS8416 和CS4354

圖5。CS4354評估板電路圖：電源