WM8728

厂商：
WOLFSON
封装：
描述：
WM8728 - 24-bit, 192kHz Stereo DAC with Volume Control - Wolfson Microelectronics plc

数据手册：

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数据手册
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WM8728 数据手册

w 24-bit, 192kHz Stereo DAC with Volume Control DESCRIPTION The WM8728 is a high performance stereo DAC designed for audio applications such as DVD, home theatre systems, and digital TV. The WM8728 supports PCM data input word lengths from 16 to 32-bits and sampling rates up to 192kHz. The WM8728 consists of a serial interface port, digital interpolation filters, multi-bit sigma delta modulators and stereo DAC in a small 20-pin SSOP package. The WM8728 also includes a digitally controllable mute and attenuate function for each channel. The WM8728 supports a variety of connection schemes for audio DAC control. The 2 or 3-wire MPU serial port provides access to a wide range of features including on-chip mute, attenuation and phase reversal. A hardware controllable interface is also available The WM8728 is an ideal device to interface to AC-3, DTS, and MPEG audio decoders for surround sound applications, or for use in DVD players supporting DVD-A. WM8728 FEATURES • • Stereo DAC with 24 bit PCM Audio Performance • • • 106dB SNR (‘A’ weighted @ 48kHz) DAC - -97dB THD DAC Sampling Frequency: 8kHz - 192kHz 2 or 3-Wire Serial Control Interface or Hardware Control Programmable Audio Data Interface Modes - I2S, Left, Right Justified, DSP - 16/20/24/32 bit Word Lengths Independent Digital Volume Control on Each Channel with 127.5dB Range in 0.5dB Steps 3.0V - 5.5V Supply Operation 20-pin SSOP Package Exceeds Dolby Class A Performance Requirements • • • • APPLICATIONS • • • • DVD-Audio and DVD ‘Universal’ Players Home theatre systems Digital TV Digital broadcast receivers BLOCK DIAGRAM W OLFSON MICROELECTRONICS plc w :: www.wolfsonmicro.com Production Data, April 2004, Rev 4.2 Copyright 2004 Wolfson Microelectronics plc WM8728 Production Data 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 TERMINOLOGY ................................................................................................................. 7 MASTER CLOCK TIMING .................................................................................................. 8 DIGITAL AUDIO INTERFACE ............................................................................................ 8 POWER SUPPLY TIMING ................................................................................................. 9 MPU 3-WIRE INTERFACE TIMING ..................................................................................10 MPU 2-WIRE INTERFACE TIMING ..................................................................................11 DEVICE DESCRIPTION............................................................................................12 INTRODUCTION ...............................................................................................................12 CLOCKING SCHEMES .....................................................................................................12 DIGITAL AUDIO INTERFACE ...........................................................................................13 AUDIO DATA SAMPLING RATES.....................................................................................15 HARDWARE CONTROL MODES .....................................................................................16 SOFTWARE CONTROL INTERFACE...............................................................................18 REGISTER MAP ...............................................................................................................19 ATTENUATION CONTROL...............................................................................................20 DIGITAL FILTER CHARACTERISTICS.............................................................................23 DAC FILTER RESPONSES...............................................................................................23 DIGITAL DE-EMPHASIS CHARACTERISTICS ........................................................24 APPLICATIONS INFORMATION ..............................................................................25 RECOMMENDED EXTERNAL COMPONENTS (PCM AUDIO).........................................25 RECOMMENDED EXTERNAL COMPONENTS VALUES .................................................25 RECOMMENDED ANALOGUE LOW PASS FILTER FOR PCM DATA FORMAT (OPTIONAL)......................................................................................................................26 PACKAGE DIMENSIONS .........................................................................................27 IMPORTANT NOTICE ...............................................................................................28 ADDRESS: ........................................................................................................................28 w PD Rev 4.2 April 2004 2 WM8728 Production Data PIN CONFIGURATION ORDERING INFORMATION DEVICE XWM8728EDS W M8728SEDS XWM8728EDS/R W M8728SEDS/R Note: Reel quantity = 2,000 TEMP. RANGE -25 to +85oC -25 to +85 C -25 to +85oC -25 to +85oC o PACKAGE 20-pin SSOP 20-pin SSOP (lead free) 20-pin SSOP (tape and reel) 20-pin SSOP (lead free, tape and reel) MOISTURE SENSITIVITY LEVEL MSL1 MSL1 MSL1 MSL1 PEAK SOLDERING TEMP 260°C 260°C 260°C 260°C w PD Rev 4.2 April 2004 3 WM8728 Production Data PIN DESCRIPTION PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 NAME LRCIN DIN BCKIN MCLK ZERO DGND DVDD VOUTR AGND AVDD VOUTL VMID VREFN VREFP CSBIWL MODE MUTEB SDIDEM SCK LATI2S TYPE Digital Input Digital Input Digital Input Digital Input Digital Output (Open drain) Supply Supply Analogue Output Supply Supply Analogue Output Analogue Output Supply Supply Digital Input (pull-up) Digital Input (pull-down) Digital Bi-directional Digital Bi-directional Digital Input (pull-down) Digital Input (pull-up) DESCRIPTION DAC Sample Rate Clock Input: PCM Input Mode Serial Audio Data Input: PCM Input Mode Audio Data Bit Clock Input Master Clock Input Infinite ZERO Detect Flag (L = IDZ detected, H = IDZ not detected). Digital Ground Supply Digital Positive Supply Right Channel DAC Output Analogue Ground Supply Analogue Positive Supply Left Channel DAC Output Mid Rail Decoupling Point DAC Negative Reference – normally AGND, must not be below AGND DAC Positive Reference – normally AVDD, must not be above AVDD Software Mode: 3-Wire Serial Control Chip Select Hardware Mode: Input Word Length Control Mode Selection (L = Hardware, H = Software) Mute Control (L = Mute on, H = Mute off, Z = Automute Enabled) Software Mode: 3 or 2-Wire Serial Control Data Input: Hardware Mode: De-Emphasis Select Software Mode: 3 or 2-Wire Serial Control Clock Input Software Mode 3-Wire Serial Control Load Input Hardware Mode: Input Data Format Selection Note: Digital input pins have Schmitt trigger input buffers. w PD Rev 4.2 April 2004 4 WM8728 Production Data 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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WM8728

1. 物料型号： - 型号为WM8728，由Wolfson Microelectronics plc生产。

2. 器件简介： - WM8728是一款24位，192kHz的立体声DAC，专为DVD、家庭影院系统和数字电视等音频应用设计。支持从16到32位的PCM数据输入字长和高达192kHz的采样率。该器件包含串行接口端口、数字插值滤波器、多比特Sigma-Delta调制器和立体声DAC，并采用20引脚SSOP封装。WM8728还包含可数字控制的每个通道的静音和衰减功能。

3. 引脚分配： - 引脚1（LRCIN）：DAC采样率时钟输入。 - 引脚2（DIN）：串行音频数据输入。 - 引脚3（BCKIN）：音频数据位时钟输入。 - 引脚4（MCLK）：主时钟输入。 - 引脚5（ZERO）：无限零检测标志（开漏）。 - 引脚6（DGND）：数字地。 - 引脚7（DVDD）：数字正供电。 - 引脚8（VOUTR）：右通道DAC输出。 - 引脚9（AGND）：模拟地。 - 引脚10（AVDD）：模拟正供电。 - 引脚11（VOUTL）：左通道DAC输出。 - 引脚12（VMID）：中轨去耦点。 - 引脚13（VREFN）：DAC负参考。 - 引脚14（VREFP）：DAC正参考。 - 引脚15（CSBIWL）：软件模式下的3线串行控制芯片选择，硬件模式下输入字长。 - 引脚16（MODE）：控制模式选择。 - 引脚17（MUTEB）：静音控制。 - 引脚18（SDIDEM）：软件模式下的3线或2线串行控制数据输入；硬件模式下的去加重选择。 - 引脚19（SCK）：软件模式下的3线或2线串行控制时钟输入。 - 引脚20（LATTI2S）：软件模式下的3线串行控制加载输入；硬件模式下的输入数据格式选择。

4. 参数特性： - 立体声DAC，24位PCM。 - 音频性能：106dB信噪比（A加权@48kHz），DAC -97dB总谐波失真。 - 支持2或3线串行控制接口或硬件控制。 - 可编程音频数据接口模式：I2S、左对齐、右对齐、DSP。 - 支持16/20/24/32位字长。 - 独立数字音量控制，每通道127.5dB范围，0.5dB步进。 - 供电范围3.0V - 5.5V。 - 超过Dolby Class A性能要求。

5. 功能详解： - WM8728提供多种连接方案用于音频DAC控制，包括2或3线MPU串行端口，可访问多种特性，如芯片上静音、衰减和相位反转。还提供硬件可控制的接口。 - 理想用于与AC-3、DTS和MPEG音频解码器接口，用于环绕声应用，或用于支持DVD-A的DVD播放器。

6. 应用信息： - 适用于DVD-Audio和DVD“通用”播放器、家庭影院系统、数字电视、数字广播接收器等。

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