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WM8985

更新时间： 2024-11-07 03:54:39
品牌 Logo 应用领域
欧胜 - WOLFSON 解码器编解码器
页数 文件大小 规格书
118页 1498K
描述
Multimedia CODEC With Class D Headphone and Line Out

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中文翻译

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WM8985 技术参数

生命周期：TransferredReach Compliance Code：unknown
风险等级：5.59Is Samacsys：N
Base Number Matches：1

WM8985 数据手册

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WM8985  
w
Multimedia CODEC With Class D Headphone and Line Out  
DESCRIPTION  
FEATURES  
Stereo Codec:  
The WM8985 is a low power, high quality, feature-rich stereo  
codec designed for portable multimedia applications that require  
low power consumption and high quality audio.  
•
•
•
DAC SNR 98dB, THD -86dB (‘A’ weighted @ 48kHz)  
ADC SNR 92.5dB, THD -75dB (‘A’ weighted @ 48kHz)  
Headphone driver with ‘capless’ option  
The device integrates preamps for stereo differential mics, and  
includes class D and class AB drivers for headphone and  
differential or stereo line output. External component  
requirements are reduced as no separate microphone or  
headphone amplifiers are required.  
•
•
•
•
40mW/channel output power into 16Ω / 3.3V AVDD2  
Class D headphone driver  
Class AB headphone / line Driver  
PSRR 70dB at 217Hz  
•
Stereo, mono or differential line output  
Advanced DSP features include  
a 5-band equaliser, an  
Mic Preamps:  
ALC/limiter for the microphone or line input through the ADC  
and a digital playback limiter. Additional digital filtering options  
are available in the ADC path, to cater for application filtering  
such as ‘wind noise reduction’ and a programmable notch filter.  
Highly flexible mixers enable many new application features,  
with the option to record and playback any combination of voice,  
line inputs and digital audio such as FM Radio or MP3.  
•
•
•
•
•
Stereo differential or mono microphone interfaces  
Programmable preamp gain  
Pseudo differential inputs with common mode rejection  
Programmable ALC / Noise Gate in ADC path  
Low-noise bias supplied for electret microphones  
Other Features:  
The WM8985 digital audio interface can operate in master or  
slave mode, while an integrated PLL provides flexible clocking  
schemes.  
•
•
•
•
•
•
•
•
Enhanced 3-D function for improved stereo separation  
Digital playback limiter  
5-band Equaliser (record or playback)  
Programmable ADC High Pass Filter (wind noise reduction)  
Programmable ADC Notch Filter  
Aux inputs for stereo analog input signals or ‘beep’  
PLL supporting various clocks between 8MHz-50MHz  
Sample rates supported (kHz): 8, 11.025, 16, 12, 16, 22.05,  
24, 32, 44.1, 48  
The WM8985 operates at analogue supply voltages from 2.5V  
to 3.3V, although the digital core can operate at voltages down  
to 1.71V to save power. Additional power management control  
enables individual sections of the chip to be powered down  
under software control.  
•
•
•
•
Low power, low voltage  
2.5V to 3.6V analogue supplies  
1.71V to 3.6V digital supplies  
5x5mm 32-lead QFN package  
APPLICATIONS  
•
•
Portable audio player / FM radio  
Multimedia Mobile Handsets  
Pre-Production, October 2006, Rev 3.4  
WOLFSON MICROELECTRONICS plc  
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/  
Copyright ©2006 Wolfson Microelectronics plc  
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