Datasheet > WM8940_07

WM8940_07

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
85页	819K
描述
Mono CODEC with Speaker Driver

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WM8940_07 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 16Ω

BTL speaker drive 0.4W into 8Ω

•

Additional MONO Line output

Multiple analog or ‘Aux’ inputs, plus analog 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 µ-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.

Pre-Production, Rev3.0, February2007,

WOLFSON MICROELECTRONICS plc

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与WM8940_07相关器件

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WM8940_11	WOLFSON	获取价格	Mono CODEC with Speaker Driver
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WM8940CGEFL/V	WOLFSON	获取价格	Mono CODEC with Speaker Driver
WM8940GEFL/RV	WOLFSON	获取价格	Mono CODEC with Speaker Driver
WM8940GEFL/V	WOLFSON	获取价格	Mono CODEC with Speaker Driver
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

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