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WM8904GEFL/V PDF预览

WM8904GEFL/V

更新时间: 2024-11-23 21:19:51
品牌 Logo 应用领域
凌云 - CIRRUS PC
页数 文件大小 规格书
184页 1716K
描述
PCM Codec, A/MU-Law, 1-Func, CMOS, PQCC32, 4 X 4 MM, 0.75 MM HEIGHT, 0.40 MM PITCH, LEAD FREE, PLASTIC, QFN-32

WM8904GEFL/V 技术参数

生命周期:Obsolete包装说明:HVQCCN,
Reach Compliance Code:compliantHTS代码:8542.39.00.01
风险等级:5.75压伸定律:A/MU-LAW
滤波器:YESJESD-30 代码:S-PQCC-N32
长度:4 mm功能数量:1
端子数量:32工作模式:SYNCHRONOUS
最高工作温度:85 °C最低工作温度:-40 °C
封装主体材料:PLASTIC/EPOXY封装代码:HVQCCN
封装形状:SQUARE封装形式:CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
座面最大高度:0.8 mm标称供电电压:1 V
表面贴装:YES技术:CMOS
电信集成电路类型:PCM CODEC温度等级:INDUSTRIAL
端子形式:NO LEAD端子节距:0.4 mm
端子位置:QUAD宽度:4 mm
Base Number Matches:1

WM8904GEFL/V 数据手册

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WM8904  
w
Ultra Low Power CODEC for Portable Audio Applications  
DESCRIPTION  
FEATURES  
4mW quiescent power consumption for DAC to headphone  
playback  
The WM8904 is a high performance ultra-low power stereo  
CODEC optimised for portable audio applications.  
DAC SNR 96dB typical, THD -86dB typical  
ADC SNR 91dB 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 headphone and  
line outputs eliminate AC coupling capacitors, and both  
outputs include common mode feedback paths to reject  
ground noise.  
2.4mW quiescent power consumption for analogue bypass  
playback  
Control write sequencer for pop minimised start-up and  
shutdown  
Control sequences for audio path setup can be pre-loaded  
and executed by an integrated control write sequencer to  
reduce software driver development and minimise pops and  
clicks via Wolfson’s SilentSwitch™ technology.  
Single register write for default start-up sequence  
Integrated FLL provides all necessary clocks  
-
-
Self-clocking modes allow processor to sleep  
All standard sample rates from 8kHz to 96kHz  
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.  
Stereo digital microphone input  
3 single ended inputs per stereo channel  
1 fully differential mic / line input per stereo channel  
A stereo digital microphone interface is provided, with a  
choice of two inputs.  
Digital Dynamic Range Controller (compressor / limiter)  
Digital sidetone mixing  
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  
ReTuneTM Mobile 5-band parametric equaliser with fully  
programmable coefficients is integrated for optimization of  
speaker characteristics. Programmable dynamic range  
control is also available for maximizing loudness, protecting  
speakers from clipping and preventing premature shutdown  
due to battery droop.  
32-pin QFN package (4x4mm, 0.4mm pitch)  
36-ball WLCSP package (6×6 ball grid, 0.4mm pitch)  
Common audio sampling frequencies are supported from a  
wide range of external clocks, either directly or generated  
via the FLL.  
APPLICATIONS  
Portable multimedia players  
Multimedia handsets  
Handheld gaming  
The WM8904 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.  
Wireless headsets  
Mobile internet devices  
Netbooks  
WOLFSON MICROELECTRONICS plc  
Pre-Production, February 2010, Rev 3.2  
Copyright ©2010 Wolfson Microelectronics plc  
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews  

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