Datasheet > WM8974_07

WM8974_07

更新时间： 2024-09-18 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
87页	996K
描述
Mono CODEC with Speaker Driver

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WM8974_07 数据手册

WM8974

Mono CODEC with Speaker Driver

DESCRIPTION

FEATURES

•

Mono CODEC:

The WM8974 is a low power, high quality mono CODEC

designed for portable applications such as Digital Still Camera

or Digital Voice Recorder.

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 -83dB (‘A’-weighted @ 8 – 48ks/s)

On-chip Headphone/Speaker Driver with ‘cap-less’ connect

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 / 3.3V SPKVDD

BTL speaker drive 0.9W into 8Ω / 5V SPKVDD

•

Additional MONO Line output

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

Mic Preamps:

Differential or single end Microphone Interface

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. Additional digital filtering

options are available in the ADC path, to cater for application

filtering such as ‘wind noise reduction’, plus an advanced

mixed signal ALC function with noise gate is provided. The

digital audio interface supports A-law and µ-law companding.

Programmable preamp gain

Psuedo differential inputs with common mode rejection

Programmable ALC / Noise Gate in ADC path

•

Low-noise bias supplied for electret microphones

OTHER FEATURES

•

5 band EQ (record or playback path)

Digital Playback Limiter

Programmable ADC High Pass Filter (wind noise reduction)

Programmable ADC Notch Filter

On-chip PLL

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.

The WM8974 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. The speaker and mono outputs use a

separate supply of up to 5V which enables increased output

power if required. Different sections of the chip can also be

powered down under software control by way of the selectable

two or three wire control interface.

Low power, low voltage

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

power consumption <10mA all-on 48ks/s mode

•

4x4x0.9mm 24 lead QFN package

APPLICATIONS

WM8974 is supplied in a very small 4x4mm QFN package,

offering high levels of functionality in minimum board area,

with high thermal performance.

•

Digital Still Camera Audio Codec

Wireless VoIP and other communication device handsets /

headsets

•

Portable audio recorder

General Purpose low power audio CODEC

Production Data, Rev 4.2 March 2007

WOLFSON MICROELECTRONICS plc

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与WM8974_07相关器件

型号	品牌	获取价格	描述	数据表
WM8974CGEFL/RV	CIRRUS	获取价格	PCM Codec, A/MU-Law, 1-Func, CMOS, PQCC24, QFN-24
WM8974CGEFL/V	CIRRUS	获取价格	PCM Codec, A/MU-Law, 1-Func, CMOS, PQCC24, QFN-24
WM8974GEFL	WOLFSON	获取价格	MONO CODEC WITH SPEAKER DRIVER
WM8974GEFL/RV	WOLFSON	获取价格	MONO CODEC WITH SPEAKER DRIVER
WM8974GEFL/V	WOLFSON	获取价格	MONO CODEC WITH SPEAKER DRIVER
WM8976	WOLFSON	获取价格	Stereo CODEC With Speaker Driver
WM8976_06	WOLFSON	获取价格	Stereo CODEC With Speaker Driver
WM8976_11	WOLFSON	获取价格	Stereo CODEC with Speaker Driver
WM8976CGEFL/RV	WOLFSON	获取价格	Stereo CODEC with Speaker Driver
WM8976CGEFL/V	WOLFSON	获取价格	Stereo CODEC with Speaker Driver

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