WM8521_06

厂商：
WOLFSON
封装：
描述：
WM8521_06 - Stereo DAC with Integrated Output Stage for 2Vrms LINE OUT - Wolfson Microelectronics pl...

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WM8521_06 数据手册

w DESCRIPTION The WM8521 is a 192kHz stereo DAC with an integrated output op-amp stage, designed to generate a 2.0Vrms output signal directly, so reducing external component requirements in digital audio applications. WM8521 comes into two variants WM8521HC and WM8521H9 which offers different line drive output capabilities. WM8521HC outputs 2Vrms at 12V supply, while WM8521H9 outputs 2.0Vrms at 9V supply. WM8521HC/H9 are designed for cost sensitive consumer digital audio applications requiring 2Vrms line output. A 24-bit multi-bit sigma delta DAC is used with oversampling digital interpolation filters. Digital audio input word lengths from 16-32 bits and sampling rates from 8kHz to 192kHz are supported. The audio interface supports I S, Right Justified and DSP digital audio formats. The devices are controlled via a hardware interface which provides access to features including de-emphasis, mute and data formats. These devices are pin equivalent and are available in a 14-lead SOIC package. 2 WM8521 Stereo DAC with Integrated Output Stage for 2Vrms LINE OUT FEATURES • • • • • • Audio Performance - DAC SNR 98dB (‘A’ weighted @ 48kHz) - THD -81dB (‘A’ weighted @ 48kHz) DAC Sampling Frequency: 8kHz – 192kHz Pin Selectable Audio Data Interface Format - I2S, 16-bit Right Justified or 16bit DSP 2.0 Vrms output at 12V or 9V supply 7.6V to 13.2V Analogue, 2.7V to 3.6 Digital Supply 14-lead SOIC Package APPLICATIONS • Consumer digital audio applications requiring 2 Vrms output - DVD Players - Digital TV - Digital Set Top Boxes - A/V Receivers BLOCK DIAGRAM WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/ Production Data, August 2006, Rev 4.1 Copyright 2006 Wolfson Microelectronics plc WM8521 TABLE OF CONTENTS Production Data DESCRIPTION .......................................................................................................1 FEATURES.............................................................................................................1 APPLICATIONS .....................................................................................................1 BLOCK DIAGRAM .................................................................................................1 TABLE OF CONTENTS .........................................................................................2 PIN CONFIGURATION...........................................................................................3 ORDERING INFORMATION ..................................................................................3 PIN DESCRIPTION ................................................................................................4 ABSOLUTE MAXIMUM RATINGS.........................................................................5 DC ELECTRICAL CHARACTERISTICS ................................................................6 ELECTRICAL CHARACTERISTICS ......................................................................6 TERMINOLOGY............................................................................................................. 7 MASTER CLOCK TIMING.............................................................................................. 8 DIGITAL AUDIO INTERFACE........................................................................................ 8 DEVICE DESCRIPTION.........................................................................................9 GENERAL INTRODUCTION.......................................................................................... 9 DAC CIRCUIT DESCRIPTION....................................................................................... 9 CLOCKING SCHEMES ................................................................................................ 10 DIGITAL AUDIO INTERFACE...................................................................................... 10 AUDIO DATA SAMPLING RATES ............................................................................... 12 HARDWARE CONTROL MODES................................................................................ 13 DIGITAL FILTER CHARACTERISTICS ....................................................................... 15 DAC FILTER RESPONSES ......................................................................................... 15 DIGITAL DE-EMPHASIS CHARACTERISTICS ........................................................... 16 APPLICATIONS INFORMATION .........................................................................17 RECOMMENDED EXTERNAL COMPONENTS........................................................... 17 RECOMMENDED EXTERNAL COMPONENTS VALUES............................................ 17 RECOMMENDED ANALOGUE LOW PASS FILTER ................................................... 18 PCB LAYOUT RECOMMENDATIONS......................................................................... 18 PACKAGE DRAWING..........................................................................................19 IMPORTANT NOTICE ..........................................................................................20 ADDRESS:................................................................................................................... 20 w PD Rev 4.1 August 2006 2 Production Data WM8521 PIN CONFIGURATION ORDERING INFORMATION DEVICE W M8521HCGED/V W M8521HCGED/RV TEMPERATURE RANGE -25 to +85oC -25 to +85oC PACKAGE 14-lead SOIC (Pb- free) 14-lead SOIC (Pb-free, tape and reel) 14-lead SOIC (Pb-free) 14-lead SOIC (Pb-free, tape and reel) MOISTURE SENSITIVITY LEVEL MSL1 MSL1 PEAK SOLDERING TEMPERATURE 260oC 260oC W M8521H9GED/V W M8521H9GED/RV -25 to +85oC -25 to +85 C o MSL1 MSL1 260oC 260oC Note: 1. 2. 3. Reel quantity = 3,000 WM8521H9: 2Vrms output at 9V supply WM8521HC: 2Vrms output at 12V supply w PD Rev 4.1 August 2006 3 WM8521 PIN DESCRIPTION PIN 1 2 3 4 5 NAME DGND LRCLK DIN BCLK MUTE Supply Digital input Digital input Digital input Digital input TYPE Digital Negative supply Sample rate clock input Serial audio data input Bit clock input Soft mute control, Internal pull down High Impedance = Automute High = Mute ON Low = Mute OFF Right channel DAC output Analogue Negative supply Analogue internal reference Analogue Positive supply Left channel DAC output De-emphasis select, Internal pull down High = de-emphasis ON Low = de-emphasis OFF Data input format select, Internal pull up Low = 16-bit right justified or 16bit DSP ‘Mode A’ High = 16-32-bit I2S or 16bit DSP ‘Mode B’ Master clock input Digital Positive supply DESCRIPTION Production Data 6 7 8 9 10 11 VOUTR AGND CAP AVDD VOUTL DEEMPH Analogue output Supply Analogue output Supply Analogue output Digital input 12 FORMAT Digital input 13 14 Note: 1. MCLK DVDD Digital input Supply Digital input pins have Schmitt trigger input buffers. w PD Rev 4.1 August 2006 4 Production Data WM8521 ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical Characteristics at the test conditions specified. ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically susceptible to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage of this device. Wolfson tests its package types according to IPC/JEDEC J-STD-020B for Moisture Sensitivity to determine acceptable storage conditions prior to surface mount assembly. These levels are: MSL1 = unlimited floor life at

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WM8521_06

1. 物料型号： - WM8521HCGED/V：-25到+85°C温度范围，14引脚SOIC（无铅）封装，MSL1湿度敏感等级，峰值焊接温度260°C。 - WM8521HCGED/RV：-25到+85°C温度范围，14引脚SOIC（无铅，卷带式），MSL1湿度敏感等级，峰值焊接温度260°C。 - WM8521H9GED/V：-25到+85°C温度范围，14引脚SOIC（无铅）封装，MSL1湿度敏感等级，峰值焊接温度260°C。 - WM8521H9GED/RV：-25到+85°C温度范围，14引脚SOIC（无铅，卷带式），MSL1湿度敏感等级，峰值焊接温度260°C。

2. 器件简介： - WM8521是一款192kHz立体声DAC，集成了输出运算放大级，设计用于直接生成2.0Vrms输出信号，减少数字音频应用中的外部组件需求。WM8521有两种变体：WM8521HC和WM8521H9，分别在12V和9V供电下输出2Vrms。适用于需要2Vrms线路输出的成本敏感的消费数字音频应用。

3. 引脚分配： - DGND(1)：数字负供电 - LRCLK(2)：采样率时钟输入 - DIN(3)：串行音频数据输入 - BCLK(4)：位时钟输入 - MUTE(5)：软静音控制 - VOUTR(6)：右声道DAC输出 - AGND(7)：模拟负供电 - CAP(8)：模拟内部参考 - AVDD(9)：模拟正供电 - VOUTL(10)：左声道DAC输出 - DEEMPH(11)：去加重选择 - FORMAT(12)：数据输入格式选择 - MCLK(13)：主时钟输入 - DVDD(14)：数字正供电

4. 参数特性： - 音频性能：DAC信噪比98dB（A加权@48kHz），总谐波失真-81dB（A加权@48kHz） - DAC采样频率：8kHz – 192kHz - 2.0 Vrms输出在12V或9V供电 - 模拟供电7.6V到13.2V，数字供电2.7V到3.6V

5. 功能详解： - WM8521采用24位多比特sigma-delta DAC和过采样数字插值滤波器。支持16-32位音频输入字长和8kHz到192kHz的采样率。音频接口支持I2S、右对齐和DSP数字音频格式。通过硬件接口控制，包括去加重、静音和数据格式等功能。

6. 应用信息： - 适用于需要2Vrms输出的消费数字音频应用，如DVD播放器、数字电视、数字机顶盒、A/V接收器等。

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