Datasheet > WM8940_11

WM8940_11

更新时间： 2024-11-09 12:23:27

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
91页	922K
描述
Mono CODEC with Speaker Driver

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WM8940_11 数据手册

WM8940

Mono CODEC with Speaker Driver

DESCRIPTION

FEATURES



Mono CODEC:

The WM8940 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.

40mW output power into 16

BTL speaker drive 0.4W into 8



Additional MONO Line output

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

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 -

law companding.



Mic Preamps:

Differential or single end Microphone Interface

Programmable preamp gain

Pseudo differential inputs with common mode rejection

Programmable ALC / Noise Gate in ADC path



Low-noise bias supplied for electret microphones

OTHER FEATURES



Digital Playback Limiter

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.

Programmable high pass filter (wind noise reduction)

4 notch filters (narrowband noise suppression)

On-chip PLL

Low power, low voltage

The WM8940 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.

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



4x4x0.9mm 24 lead QFN package

APPLICATIONS



Digital still cameras and camcorders

General purpose mono audio CODEC

WM8940 is supplied in a very small 4x4mm QFN package,

offering high levels of functionality in minimum board area, with

high thermal performance.

Production Data, Rev4.3, November 2011

WOLFSON MICROELECTRONICS plc

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

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WM8940CGEFL/RV	WOLFSON	获取价格	Mono CODEC with Speaker Driver
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WM8941	WOLFSON	获取价格	Mono CODEC with Speaker Driver and Video Buffer
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

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