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WM8725ED

WM8725ED

  • 厂商:

    WOLFSON

  • 封装:

  • 描述:

    WM8725ED - 99dB Stereo DAC - Wolfson Microelectronics plc

  • 详情介绍
  • 数据手册
  • 价格&库存
WM8725ED 数据手册
w 99dB Stereo DAC DESCRIPTION W M8725 is a high-performance stereo DAC designed for use in portable audio equipment, video CD players and 2 similar applications. It comprises selectable normal or I S compatible serial data interfaces for 16 to 24-bit digital inputs, high performance digital filters, and sigma-delta output DACs, achieving an excellent 99dB signal-to-noise performance. The device is available in a 14-pin SOIC package that offers selectable mute and de-emphasis functions using a minimum of external components. WM8725 FEATURES • • • • • • • • 99dB SNR performance Stereo DAC with input sampling from 8kHz to 96kHz Additional mute feature Normal or I2S compatible data format Sigma-delta design with 64x oversampling System clock 256fs or 384fs Supply range 3V to 5V 14-pin SOIC package APPLICATIONS • • Portable audio equipment Video CD players BLOCK DIAGRAM WOLFSON MICROELECTRONICS PLC www.wolfsonmicro.com Production Data, August 2004, Rev 4.1 Copyright 2004 Wolfson Microelectronics plc. WM8725 TABLE OF CONTENTS Production Data DESCRIPTION ................................................................................................................1 FEATURES......................................................................................................................1 APPLICATIONS ..............................................................................................................1 BLOCK DIAGRAM ..........................................................................................................1 TABLE OF CONTENTS ..................................................................................................2 PIN CONFIGURATION....................................................................................................3 ORDERING INFORMATION ...........................................................................................3 ABSOLUTE MAXIMUM RATINGS..................................................................................4 RECOMMENDED OPERATING CONDITIONS ..............................................................4 ELECTRICAL CHARACTERISTICS ...............................................................................5 PIN DESCRIPTION .........................................................................................................6 DEVICE DESCRIPTION..................................................................................................7 INTRODUCTION .....................................................................................................................7 DAC CIRCUITS .......................................................................................................................7 SERIAL DATA INTERFACE ....................................................................................................8 SYSTEM CLOCK ....................................................................................................................9 RECOMMENDED EXTERNAL COMPONENTS ...........................................................10 DETAIL OF RECOMMENDED EXTERNAL COMPONENTS SHOWING THE EXTERNAL LOW PASS FILTER ..............................................................................................................10 PCB LAYOUT........................................................................................................................10 PACKAGE DIMENSIONS .............................................................................................11 IMPORTANT NOTICE ...................................................................................................12 ADDRESS: ............................................................................................................................12 w PD Rev 4.1 August 2004 2 WM8725 Production Data PIN CONFIGURATION LRCIN DIN BCKIN NC CAP VOUTR GND 1 2 3 4 5 6 7 14 13 SCKI FORMAT DEEMPH NC MUTE VOUTL VDD WM8725 12 11 10 9 8 ORDERING INFORMATION DEVICE W M8725ED W M8725ED/R W M8725GED/V W M8725GED/RV TEMPERATURE RANGE -25 C to +85 C -25oC to +85oC -25oC to +85oC -25oC to +85oC o 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 MSL1 MSL1 MSL2 MSL2 PEAK BODY TEMPERATURE 240 C 240oC 260oC 260oC o Note: Reel quantity: 3,000 w PD Rev 4.1 August 2004 3 WM8725 ABSOLUTE MAXIMUM RATINGS Production Data 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
WM8725ED
物料型号: - WM8725ED:工作温度范围-25°C至+85°C,14-pin SOIC封装,MSL1,峰值本体温度240°C。 - WM8725ED/R:与WM8725ED相同,但是为胶带和卷轴包装。 - WM8725GED/V:工作温度范围-25°C至+85°C,14-pin SOIC封装(无铅),MSL2,峰值本体温度260°C。 - WM8725GED/RV:与WM8725GED/V相同,但是为无铅胶带和卷轴包装。

器件简介: WM8725是一款高性能立体声DAC,适用于便携式音频设备、视频CD播放器等应用。它包含可选择的正常或I2S兼容的串行数据接口,支持16至24位数字输入,高性能数字滤波器和sigma-delta输出DAC,实现99dB的信噪比性能。该器件提供14-pin SOIC封装,使用最少的外部组件即可实现可选择的静音和去加重功能。

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,串行数据输入。 - 3号引脚:BCKIN,数字输入,比特时钟输入。 - 4号引脚:NC,无内部连接。 - 5号引脚:CAP,模拟输出,模拟内部参考。 - 6号引脚:VOUTR,模拟输出,右声道DAC输出。 - 7号引脚:GND,供电,地。 - 8号引脚:VDD,供电,正供电。 - 9号引脚:VOUTL,模拟输出,左声道DAC输出。 - 10号引脚:MUTE,数字输入,静音控制,高电平=静音。内部下拉。 - 11号引脚:NC,无内部连接。 - 12号引脚:DEEMPH,数字输入,去加重选择,高电平=去加重ON。内部上拉。 - 13号引脚:FORMAT,数字输入,数据输入格式选择,低电平=正常,高电平=I2S。内部上拉。 - 14号引脚:SCKI,数字输入,系统时钟输入(256fs或384fs)。

参数特性: - 信噪比(SNR):99dB - 立体声DAC,输入采样率从8kHz到96kHz - 额外的静音特性 - 正常或I2S兼容数据格式 - Sigma-delta设计,64倍过采样 - 系统时钟256fs或384fs - 供电范围3V至5V - 14-pin SOIC封装

功能详解: WM8725是一个完整的立体声音频16-24位数字模拟转换器,包括数字插值滤波器、多比特sigma-delta以及开关电容多比特立体声DAC和输出平滑滤波器。提供了静音和去加重的特殊功能,并提供256fs或384fs的系统时钟操作,自动控制选择任一钟速率。允许的采样率(fs)从不到8ks/s到96ks/s,前提是输入了适当的系统时钟。

应用信息: - 便携式音频设备 - 视频CD播放器
WM8725ED 价格&库存

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