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WM8912GEFL/RV PDF预览

WM8912GEFL/RV

更新时间: 2024-11-26 11:59:19
品牌 Logo 应用领域
欧胜 - WOLFSON 驱动器便携式
页数 文件大小 规格书
128页 1259K
描述
Ultra Low Power DAC with Headphone Driver for Portable Audio Applications

WM8912GEFL/RV 技术参数

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

WM8912GEFL/RV 数据手册

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WM8912  
w
Ultra Low Power DAC with Headphone Driver  
for Portable Audio Applications  
DESCRIPTION  
FEATURES  
3.8mW quiescent power consumption for DAC to  
headphone playback  
The WM8912 is a high performance ultra-low power stereo  
DAC optimised for portable audio applications.  
DAC SNR 96dB typical, THD -86dB typical  
Class W ground-referenced headphone driver  
The device features stereo ground-referenced headphone  
amplifiers using the Wolfson ‘Class-W’ amplifier techniques  
-
28mW per channel into 30Ω at <1% THD  
32mW per channel into 15Ω at <1% THD  
-
incorporating an innovative dual-mode charge pump  
architecture - to optimise efficiency and power consumption  
during playback. The ground-referenced outputs eliminate  
headphone coupling capacitors. The outputs include  
common mode feedback paths to reject ground noise.  
-
Dynamic range controller  
ReTune™ Mobile parametric equalizer  
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.  
Integrated control write sequencer for pop minimised start-  
up and shutdown  
Single register write for default start-up and shutdown  
sequences  
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.  
ReTuneTM Mobile 5-band parametric equaliser with fully  
programmable coefficients is integrated for optimization of  
speaker characteristics.  
On-chip FLL provides all necessary clocks  
DAC supports standard sample rates from 8kHz to 96kHz  
32-pin QFN package (4x4mm, 0.4mm pitch)  
Common audio sampling frequencies are supported from a  
wide range of external clocks, either directly or generated  
using the integrated FLL.  
APPLICATIONS  
Portable multimedia players  
Multimedia handsets  
Handheld gaming  
The WM8912 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.  
WOLFSON MICROELECTRONICS plc  
Production Data, September 2010, Rev 4.0  
Copyright ©2010 Wolfson Microelectronics plc  
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews  

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