WM8759ED

厂商：
WOLFSON
封装：
描述：
WM8759ED - 24 BIT 192KHZ STEREO DAC WITH HEADPHONE BUFFER - Wolfson Microelectronics plc

数据手册：

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数据手册
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WM8759ED 数据手册

w DESCRIPTION The WM8759 is a high performance stereo DAC with an integrated headphone driver. It is designed for audio applications such as portable DVD, MP3 players or consumer equipment with line output and headphone output connections. The WM8759 supports data input word lengths from 16 to 24-bits and sampling rates up to 192kHz. The WM8759 consists of a serial interface port, digital interpolation filters, multi-bit sigma delta modulators and stereo DAC in a 14-pin SOIC package. The hardware control interface is used for the selection of audio data interface format, enable and de-emphasis. The WM8759 supports I2S, right Justified or DSP interfaces. Operating on split analog digital supplies the WM8759 allows very lower power consumption from the digital section, whilst supporting large output powers from the analog headphone driver. WM8759 24-bit 192kHz Stereo DAC with Headphone Buffer FEATURES • • • Stereo DAC with headphone driver 50mW power into 16R load on 3.3V supply Audio Performance • • • • • 100dB SNR (‘A’ weighted @ 48kHz) -88dB THD line level -72dB THD headphone DAC Sampling Frequency: 8kHz – 192kHz Pin Selectable Audio Data Interface Format I2S, 16-bit Right Justified or DSP 2.7V - 5.5V Supply Operation, Split Analog-digital supplies 14-pin SOIC Package Typical power consumption 20mW on 2.7V supply APPLICATIONS • • • Portable music Players Home music players Digital TV BLOCK DIAGRAM W OLFSON MICROELECTRONICS plc www.wolfsonmicro.com Advanced Information, September 2004, Rev 3.0 Copyright 2004 Wolfson Microelectronics plc WM8759 Advanced Information TABLE OF CONTENTS 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 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.............................................................................14 DAC FILTER RESPONSES...............................................................................................14 DIGITAL DE-EMPHASIS CHARACTERISTICS ........................................................15 APPLICATIONS INFORMATION ..............................................................................16 RECOMMENDED EXTERNAL COMPONENTS .......................................................16 POWER UP/DOWN SEQUENCE......................................................................................16 PCB LAYOUT RECOMMENDATIONS ..............................................................................17 PACKAGE DRAWING...............................................................................................18 IMPORTANT NOTICE ...............................................................................................19 ADDRESS: ........................................................................................................................19 w AI Rev 3.0 September 2004 2 Advanced Information WM8759 PIN CONFIGURATION ORDERING INFORMATION DEVICE W M8759ED/V W M8759ED/RV W M8759GED/V TEMPERATURE RANGE -25 to +85oC -25 to +85 C -25 to +85oC o PACKAGE 14-pin SOIC 14-pin SOIC (tape and reel) 14-pin SOIC (lead free) 14-pin SOIC (lead free, tape and reel) MOISTURE SENSITIVITY LEVEL MSL2 MSL2 MSL2 PEAK SOLDERING TEMPERATURE 240°C 240°C 260°C W M8759GED/RV -25 to +85oC MSL2 260°C Note: Reel quantity = 3,000 w AI Rev 3.0 September 2004 3 WM8759 Advanced Information PIN DESCRIPTION PIN 1 2 3 4 5 6 7 8 9 10 11 12 NAME LRCIN DIN BCKIN ENABLE CAP HPOUTR AGND AVDD HPOUTL DGND DVDD DEEMPH TYPE Digital input Digital input Digital input Digital input Analogue output Analogue output Supply Supply Analogue output Digital Supply Digital Supply Digital input Sample rate clock input Serial audio data input Bit clock input Enable input – 0 = powered down, 1 = enabled Analogue internal reference Right channel DAC output Ground reference for analog circuits and substrate connection Positive supply for analog circuits Left channel DAC output Digital ground supply Digital positive supply 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 DSP ‘late’ High = 16-24-bit I2S or DSP ‘early’ Master clock input DESCRIPTION 13 FORMAT Digital input 14 MCLK Digital input Note: 1. Digital input pins have Schmitt trigger input buffers. w AI Rev 3.0 September 2004 4 Advanced Information WM8759 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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WM8759ED

1. 物料型号： - 型号为WM8759，是一款24位192kHz立体声DAC，带耳机缓冲器。

2. 器件简介： - WM8759是一款性能较高的立体声DAC，集成了耳机驱动器。适用于便携式DVD、MP3播放器或带有线路输出和耳机输出连接的消费设备。支持16至24位数据输入字长和高达192kHz的采样率。

3. 引脚分配： - 1号引脚：LRCIN，数字输入，采样率时钟输入。 - 2号引脚：DIN，数字输入，串行音频数据输入。 - 3号引脚：BCKIN，数字输入，位时钟输入。 - 4号引脚：ENABLE，数字输入，使能输入。 - 5号引脚：CAP，模拟输出，模拟内部参考。 - 6号引脚：HPOUTR，模拟输出，右通道DAC输出。 - 7号引脚：AGND，模拟地。 - 8号引脚：AVDD，模拟正电源。 - 9号引脚：HPOUTL，模拟输出，左通道DAC输出。 - 10号引脚：DGND，数字地。 - 11号引脚：DVDD，数字正电源。 - 12号引脚：DEEMPH，数字输入，去加重选择。 - 13号引脚：FORMAT，数字输入，数据输入格式选择。 - 14号引脚：MCLK，数字输入，主时钟输入。

4. 参数特性： - 立体声DAC，带耳机驱动。 - 在3.3V供电下，16欧姆负载下能提供50mW的功率。 - 音频性能指标包括100dB的信噪比（A加权@48kHz）、-88dB的线路电平总谐波失真以及-72dB的耳机DAC总谐波失真。 - 支持I2S、16位右对齐或DSP接口。 - 供电范围2.7V至5.5V，支持数字模拟分开供电。

5. 功能详解： - WM8759由串行接口端口、数字插值滤波器、多比特sigma-delta调制器和立体声DAC组成。硬件控制接口用于选择音频数据接口格式、启用和去加重。支持高达192kHz的采样频率。

6. 应用信息： - 适用于便携音乐播放器、家用音乐播放器和数字电视等。

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