WM8731

厂商：
WOLFSON
封装：
描述：
WM8731 - portable digital audio solutions - Wolfson Microelectronics plc

数据手册：

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WM8731 数据手册

portable digital audio solutions ------------------------------------------------------------------------------------ WM8711 WM8721 WM8731 www.wolfsonmicro.com ------------------------------------------------------------------------------------------------Wolfson’s new family of audio ICs for portable applications offers highly integrated, DSP independent solutions that deliver CD quality sound at very low power consumption. The family includes a full audio codec, WM8731, and two DACs, WM8711 and WM8721. All three devices incorporate a powerful headphone amplifier whose output volume can be digitally controlled. Each IC is available as a standard or low voltage part, operating at supply voltages down to 1.42V (digital) and 1.8V (analogue). Using a unique USB clocking scheme, these ICs can generate 44.1kHz, 48kHz, 96kHz and other commonly used sample rates directly from a 12 or 24MHz clock, eliminating the need for a PLL in applications such as MP3 players. The WM8711 and WM8731 are pin-compatible and feature an on-chip clock oscillator to supply the system clock. Wolfson’s portable audio ICs have a very flexible audio interface which can interface to any industry standard DSP or other digital audio chip, thereby providing designers with a higher degree of flexibility. long battery life AUDIO DACs AND CODECS FOR BATTERY-POWERED APPLICATIONS productbenefits cd sound quality powerful headphone amplifier highly integrated solution dsp independent ----------------------------------------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------------------------------------------device device type digital supply voltage analogue supply voltage analogue line-in microphone input on-chip clock generator package WM8721 dac 1.42V – 3.6V 2.7V – 3.6V no no no 20-pin SSOP WM8721L dac (low voltage) 1.42V – 3.6V 1.8V – 3.6V no no no 20-pin SSOP WM8711 dac 1.42V – 3.6V 2.7V – 3.6V yes no yes 28-pin SSOP WM8711L dac (low voltage) 1.42V – 3.6V 1.8V – 3.6V yes no yes 28-pin SSOP WM8731 codec 1.42V – 3.6V 2.7V – 3.6V yes yes yes 28-pin SSOP WM8731L codec (low voltage) 1.42V – 3.6V 1.8V – 3.6V yes yes yes 28-pin SSOP wolfson microelectronics : : leading world experts in the design of signal processing electronics_ portable digital audio solutions ------------------------------------------------------------------------------------ WM8711 WM8721 WM8731 www.wolfsonmicro.com -----------------------------------------------------------------------> cd quality audio performance » dac 100dB snr, 88dB thd (‘A’ weighted @ 48kHz) » adc 97dB snr, 85dB thd (WM8731 only) > independent stereo line and headphone outputs » headphone output power: 40mW on 16Ω load » volume and mute controls > low supply voltage » 1.42 – 3.6V digital supply » 1.8 – 3.6V analogue supply for low-voltage parts » 2.7 – 3.6V analogue supply for standard parts > very low power » playback only: 9mW @ 1.8V, 18mW @ 3.3V » simultaneous playback & record: 18mW @ 1.8V, 36mW @ 3.3V » standby: 30µW > programmable sample rates :: 8, 32, 44.1, 48, 88.2, 96kHz > on-chip clock generator (WM8711 and WM8731 only) > programmable audio data interface » i2s, left/right justified or dsp modes » 16/20/24/32-bit word lengths » master or slave clocking mode > 2 or 3-wire serial control interface > temperature range :: –10°C to +70°C digital camcorders digital still cameras mp3 players / recorders palm tops / web browsers mobile information devices usb headsets mobile phones with mp3 productfeatures -----------------------------------------------------------------------part number WM8711EDS WM8711LEDS WM8721EDS WM8721LEDS WM8731EDS WM8731LEDS orderinginformation productapplications > > > > > > > mp3 players and recorders mobile information devices palmtops web browsers mobile phones with mp3 digital camcorders and cameras usb headsets voltage supply standard low standard low standard low standard pack quantity 47 47 66 66 47 47 package SSOP-28 SSOP-28 SSOP-20 SSOP-20 SSOP-28 SSOP-28 >> all battery powered systems incorporating digital audio wolfson microelectronics : : direct sales offices WORLD Headquarters Wolfson Microelectronics Ltd Bernard Terrace Edinburgh EH8 9NX UK Tel: +44 131 667 9386 Fax: +44 131 667 5176 USA Sales Office Wolfson Microelectronics Ltd 111 North Market Street Suite 670 San Jose CA 95113 USA Tel: +1 408 279 2882 Fax: +1 250 746 4186 ASIA PACIFIC Sales Office Wolfson Microelectronics Ltd 9F-1 No 6 Lane 180 Min-Chiuan East Road Sec 6 Taipei Taiwan RoC Tel: +886 2 2792 5775 Fax: +886 2 8791 8590 © Copyright 2001, Wolfson Microelectronics Ltd. Wolfson and are registered trademarks of Wolfson Microelectronics Ltd. All other trademarked names are the property of their respective owners. PF8731F-01/2001

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WM8731

1. 物料型号： - WM8711：DAC，标准数字供电电压1.42V - 3.6V。 - WM8711L：DAC，低电压数字供电电压1.42V - 3.6V。 - WM8721：DAC，标准数字供电电压1.42V - 3.6V。 - WM8721L：DAC，低电压数字供电电压1.42V - 3.6V。 - WM8731：CODEC，标准数字供电电压1.42V - 3.6V。 - WM8731L：CODEC，低电压数字供电电压1.42V - 3.6V。

2. 器件简介： - Wolfson提供了一系列针对便携式应用的音频IC，包括WM8731（全音频编解码器）和WM8711、WM8721（DAC）。这些IC集成了强大的耳机放大器，输出音量可以数字控制，并且有标准电压和低电压版本。

3. 引脚分配： - WM8711和WM8731是引脚兼容的，并且具有片内时钟振荡器以提供系统时钟。 - WM8711和WM8721的封装为28-pin SSOP，WM8731的封装为28-pin SSOP。

4. 参数特性： - DAC信噪比为100dB，THD（A加权@48kHz）为88dB。 - ADC信噪比为97dB，THD为85dB（仅WM8731）。 - 耳机输出功率：16欧姆负载下40mW。 - 低供电电压：数字供电1.42 - 3.6V，低电压版本模拟供电1.8 - 3.6V，标准部分模拟供电2.7 - 3.6V。 - 非常低的功耗：仅播放9mW@1.8V，18mW@3.3V；同时播放和录音18mW@1.8V，36mW@3.3V；待机30µW。

5. 功能详解： - 支持多种采样率：8, 32, 44.1, 48, 88.2, 96kHz。 - 可编程音频数据接口：I2S、左右对齐或DSP模式，16/20/24/32位字长，主/从时钟模式。 - 2或3线串行控制接口。 - 温度范围：-10°C至+70°C。

6. 应用信息： - 适用于MP3播放器和录音器、移动信息设备、掌上电脑、带MP3的移动电话、数字摄像机和相机、USB耳机等。

7. 封装信息： - WM8711和WM8731的封装为28-pin SSOP，WM8721的封装为20-pin SSOP。

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