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WM8952 PDF预览

WM8952

更新时间: 2024-09-17 12:26:31
品牌 Logo 应用领域
欧胜 - WOLFSON 放大器
页数 文件大小 规格书
72页 893K
描述
Mono ADC with Microphone Pre-amplifier

WM8952 数据手册

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WM8952  
w
Mono ADC with Microphone Pre-amplifier  
DESCRIPTION  
FEATURES  
Mono ADC:  
The WM8952 is a low power, high quality mono ADC designed  
for portable applications such as wireless microphones or  
headsets.  
Audio sample rates:8, 11.025, 16, 22.05, 24, 32, 44.1, 48kHz  
ADC SNR 94dB, THD -80dB (‘A’-weighted @ 8 – 48ks/s)  
Mic Preamps :  
The device integrates support for differential or single ended  
microphone connections. External component requirements  
are reduced as no separate microphone amplifier is required.  
Differential or single end Microphone Interface  
-
-
-
Programmable preamp gain  
Pseudo differential inputs with common mode rejection  
Programmable ALC / Noise Gate in ADC path  
An advanced Sigma Delta Converter design is used to give  
high quality audio at sample rates from 8 to 48ks/s. A  
selectable high pass filter and four fully-programmable notch  
filters are also available in the signal path. An advanced mixed  
signal ALC function with noise gate is provided, supporting  
readback of PGA gain during ALC operation. The digital audio  
interface supports A-law and μ-law companding.  
Low-noise bias supplied for electret microphones  
Multiple analog or ‘Aux’ inputs with analogue mixing  
OTHER FEATURES  
Programmable high pass filter (wind noise reduction)  
4 notch filters (narrowband noise suppression)  
On-chip PLL  
Low power, low voltage  
An on-chip PLL is provided to generate the required Master  
Clock from an external reference clock. The PLL clock can  
also be output if required elsewhere in the system.  
-
2.5V to 3.6V (digital: 1.71V to 3.6V)  
28 ball W-CSP (2.59 × 2.5 × 0.7mm, 0.4mm pitch) Package  
The WM8952 operates at supply voltages from 2.5 to 3.6V,  
although the digital supplies can operate at voltages down to  
1.71V to save power. Different sections of the chip can also be  
powered down under software control using the selectable two  
or three wire control interface. The device is supplied in a very  
small W-CSP package, offering high levels of functionality in  
minimum board area, with high thermal performance.  
APPLICATIONS  
Headsets  
Wireless microphones  
General purpose mono audio ADC  
BLOCK DIAGRAM  
WOLFSON MICROELECTRONICS plc  
Pre Production, Rev 3.1, June 2011  
Copyright ©2011 Wolfson Microelectronics plc  
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews  

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