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WM8903CLGEFK PDF预览

WM8903CLGEFK

更新时间： 2024-11-07 12:26:15
品牌 Logo 应用领域
欧胜 - WOLFSON 解码器编解码器便携式
页数 文件大小 规格书
178页 1387K
描述
Ultra Low Power CODEC for Portable Audio Applications

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WM8903CLGEFK 技术参数

生命周期：TransferredReach Compliance Code：unknown
风险等级：5.61Base Number Matches：1

WM8903CLGEFK 数据手册

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WM8903  
w
Ultra Low Power CODEC for Portable Audio Applications  
DESCRIPTION  
FEATURES  
4.5mW power consumption for DAC to headphone  
playback  
The WM8903 is a high performance ultra-low power stereo  
CODEC optimised for portable audio applications.  
DAC SNR 96dB typical, THD -86dB typical  
ADC SNR 92dB typical, THD -80dB typical  
The device features stereo ground-referenced headphone  
amplifiers using the Wolfson ‘Class W’ amplifier techniques -  
incorporating an innovative dual-mode charge pump  
architecture - to optimise efficiency and power consumption  
during playback. The ground-referenced outputs eliminate  
headphone coupling capacitors. Both headphone and line  
outputs include common mode feedback paths to reject  
ground noise.  
Control sequencer for pop minimised start-up and shut-  
down  
Single register write for default start-up sequence  
Integrated FLL provides all necessary clocks  
Control sequences for audio path setup can be pre-loaded  
and executed by an integrated sequencer to reduce  
software driver development and eliminate pops and clicks  
via Wolfson’s SilentSwitch™ technology.  
-
Self-clocking modes allow processor to sleep  
All standard sample rates from 8kHz to 96kHz  
-
Stereo digital microphone input  
The analogue input stage can be configured for single  
ended or differential inputs. Up to 3 stereo microphone or  
line inputs may be connected. The input impedance is  
constant with PGA gain setting.  
3 single ended inputs per stereo channel  
1 fully differential mic / line input per stereo channel  
Digital Dynamic Range Controller (compressor / limiter)  
Digital sidetone mixing  
A stereo digital microphone interface is provided, which can  
also be mixed with the mic/line signals at the output mixers.  
A dynamic range controller provides compression and level  
control to support a wide range of portable recording  
applications. Anti-clip and quick release features offer good  
performance in the presence of loud impulsive noises.  
Ground-referenced headphone driver  
Ground-referenced line outputs  
Stereo differential line driver for direct interface to WM9001  
speaker driver  
Common audio sampling frequencies are supported from a  
range of external clocks, either directly or generated via the  
Frequency Locked Loop (FLL).  
40-pin QFN package (5x5mm)  
The WM8903 can operate directly from a single 1.8V  
switched supply. For optimal power consumption, the digital  
core can be operated from a 1.0V supply.  
APPLICATIONS  
Portable multimedia players  
Multimedia handsets  
Handheld gaming  
WOLFSON MICROELECTRONICS plc  
Production Data, June 2012, Rev 4.5  
Copyright 2012 Wolfson Microelectronics plc  
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews  
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