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WM8956GEFLRV

更新时间： 2024-11-09 03:52:23
品牌 Logo 应用领域
欧胜 - WOLFSON 驱动器
页数 文件大小 规格书
80页 1066K
描述
Hi-Fi DAC with 1W Stereo Class D Speaker Drivers and Headphone Drivers

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WM8956GEFLRV 数据手册

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WM8956  
w
Hi-Fi DAC with 1W Stereo Class D Speaker Drivers and  
Headphone Drivers  
DESCRIPTION  
FEATURES  
•
•
•
•
DAC SNR 99dB (‘A’ weighted), THD -87dB at 48kHz, 3.3V  
Pop and click suppression  
3D Enhancement  
The WM8956 is a low power, high quality stereo DAC designed  
for portable multimedia applications.  
Stereo class D speaker drivers provide 1W per channel into 8Ω  
loads with a 5V supply. Low leakage, excellent PSRR and  
pop/click suppression mechanisms also allow direct battery  
connection to the speaker supply. Flexible speaker boost  
settings allow speaker output power to be maximised while  
minimising other analogue supply currents.  
Stereo Class D Speaker Driver  
•
•
•
•
<0.1% THD with 1W per channel into 8Ω BTL speakers  
70dB PSRR @217Hz  
87% efficiency (1W output)  
Flexible internal switching clock  
•
•
On-chip Headphone Driver  
•
•
•
40mW output power into 16Ω at 3.3V  
Capless mode support  
THD+N -70dB at 20mW, SNR 99dB with 16Ω load  
A highly flexible input configuration for up to three stereo  
sources is integrated, with a complete microphone interface.  
External component requirements are drastically reduced as no  
separate microphone, speaker or headphone amplifiers are  
required.  
Microphone Interface  
•
•
Pseudo differential for high noise immunity  
Integrated low noise MICBIAS  
Stereo 24-bit sigma-delta DACs are used with low power over-  
sampling digital interpolation filters and a flexible digital audio  
interface.  
•
•
Low Power Consumption  
16mW headphone playback (2.7V / 1.8V supplies)  
Low Supply Voltages  
•
•
•
Analogue 2.7V to 3.6V (Speaker supply up to 5.5V)  
Digital core and I/O: 1.71V to 3.6V  
The master clock can be input directly or generated internally by  
an onboard PLL, supporting most commonly-used clocking  
schemes.  
•
•
•
On-chip PLL provides flexible clocking scheme  
Sample rates: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48  
5x5x0.9mm QFN package  
The WM8956 operates at analogue supply voltages down to  
2.7V, although the digital supplies can operate at voltages down  
to 1.71V to save power. The speaker supply can operate at up  
to 5.5V, providing 1W per channel into 8Ω loads. Unused  
functions can be disabled using software control to save power.  
APPLICATIONS  
•
•
•
Mobile multimedia  
Portable media / DVD players  
Games consoles  
The WM8956 is supplied in a very small and thin 5x5mm QFN  
package, ideal for use in hand-held and portable systems.  
Preliminary Technical Data, July 2007, Rev 2.1  
WOLFSON MICROELECTRONICS plc  
To receive regular email updates, sign up at http://www.wolfsonmicro.comenews/  
Copyright ©2007 Wolfson Microelectronics plc  
1234567...80

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