Datasheet > WM8941

WM8941

更新时间： 2024-11-26 03:54:39

品牌	Logo	应用领域
欧胜 - WOLFSON		解码器驱动器编解码器
页数	文件大小	规格书
96页	1210K
描述
Mono CODEC with Speaker Driver and Video Buffer

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WM8941 数据手册

WM8941

Mono CODEC with Speaker Driver and Video Buffer

DESCRIPTION

FEATURES

•

Mono CODEC:

The WM8941 is a low power, high quality mono CODEC

designed for portable applications such as digital still cameras

or camcorders.

Audio sample rates:8, 11.025, 16, 22.05, 24, 32, 44.1, 48kHz

DAC SNR 98dB, THD -84dB (‘A’-weighted @ 8 – 48ks/s)

ADC SNR 94dB, THD -80dB (‘A’-weighted @ 8 – 48ks/s)

On-chip Headphone/Speaker Driver

The device integrates support for a differential or single ended

mic, and includes drivers for speakers or headphone, and

mono line output. External component requirements are

reduced as no separate microphone or headphone amplifiers

are required. A high performance, low power current-mode

video buffer provides inherent short circuit protection.

40mW output power into 16Ω

BTL speaker drive 0.4W into 8Ω

•

Additional MONO Line output

Multiple analog or ‘Aux’ inputs, plus analog bypass path

•

Mic Preamps :

Differential or single end Microphone Interface

An integrated video buffer is provided which has

programmable gain from 0-6dB (6-12dB unloaded), sync-tip

clamp and a 3^rdorder input low pass filter for signal re-

construction.

Programmable preamp gain

Pseudo differential inputs with common mode rejection

Programmable ALC / Noise Gate in ADC path

•

Low-noise bias supplied for electret microphones

Advanced Sigma Delta Converters are used along with digital

decimation and interpolation filters 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 available in the

ADC path. An advanced mixed signal ALC function with noise

gate is provided, while readback of PGA gain during ALC

operation is supported. The digital audio interface supports A-

law and µ-law companding.

OTHER FEATURES

•

Integrated video buffer with LPF and clamp.

Digital Playback Limiter

Programmable high pass filter (wind noise reduction)

4 notch filters (narrowband noise suppression)

On-chip PLL

Low power, low voltage

2.5V to 3.6V (digital: 1.71V to 3.6V)

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.

•

4x4x0.75mm 28 lead QFN package

APPLICATIONS

The WM8941 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.

•

Digital still cameras and camcorders

General purpose mono audio CODEC with video buffer

WM8941 is supplied in a very small 4x4mm QFN package,

offering high levels of functionality in minimum board area,

with high thermal performance.

WOLFSON MICROELECTRONICS plc

Pre Production, Rev 3.3, December 2007

To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/

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与WM8941相关器件

型号	品牌	获取价格	描述	数据表
WM8941GEFL	WOLFSON	获取价格	Mono CODEC with Speaker Driver and Video Buffer
WM8941GEFL/RV	WOLFSON	获取价格	Mono CODEC with Speaker Driver and Video Buffer
WM8941GEFL/V	WOLFSON	获取价格	Mono CODEC with Speaker Driver and Video Buffer
WM8941GEFLRV	WOLFSON	获取价格	Mono CODEC with Speaker Driver and Video Buffer
WM8941GEFLV	WOLFSON	获取价格	Mono CODEC with Speaker Driver and Video Buffer
WM8944	CIRRUS	获取价格	带视频缓冲器的单声道编解码器
WM8944B	CIRRUS	获取价格	Mono Low-Power CODEC with Video Buffer
WM8944BECS/R	CIRRUS	获取价格	PCM Codec, A/MU-Law, 1-Func, CMOS, PBGA25, WCSP-25
WM8945	WOLFSON	获取价格	Mono Low-Power CODEC with Video Buffer and Touch Panel Controller
WM8945ECS/R	WOLFSON	获取价格	Mono Low-Power CODEC with Video Buffer and Touch Panel Controller

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