Datasheet > WM8978GEFL

WM8978GEFL

更新时间： 2024-09-17 22:22:19

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
78页	909K
描述
STEREO CODEC WITH SPEAKER DRIVER

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中文翻译

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WM8978GEFL 数据手册

WM8978

Stereo CODEC With Speaker Driver

DESCRIPTION

FEATURES

•

Stereo Codec:

The WM8978 is a low power, high quality stereo codec

designed for portable applications such as Digital still camera or

Digital Camcorder.

DAC SNR 98dB, THD -84dB (‘A’ weighted @ 48kHz)

ADC SNR 90dB, THD -80dB (‘A’ weighted @ 48kHz)

On-chip Headphone Driver with ‘capless’ option

The device integrates preamps for stereo differential mics, and

includes drivers for speakers, headphone and differential or

stereo line output. External component requirements are

reduced as no separate microphone or headphone amplifiers

are required.

40mW output power into 16Ω / 3.3V SPKVDD

•

0.9W output power into 8Ω BTL speaker / 5V SPKVDD

Capable of driving piezo speakers

Stereo speaker drive configuration

•

Mic Preamps:

Stereo Differential or mono microphone Interfaces

Advanced on-chip digital signal processing includes a 5-band

equaliser, a mixed signal Automatic Level Control for the

microphone or line input through the ADC as well as a purely

digital limiter function for record or playback. Additional digital

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

application filtering such as ‘wind noise reduction’.

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:

Enhanced 3-D function for improved stereo separation

Digital playback limiter

5-band Equaliser (record or playback)

Programmable ADC High Pass Filter (wind noise reduction)

Programmable ADC Notch Filter

Aux inputs for stereo analog input signals or ‘beep’

On-chip PLL supporting 12, 13, 19.2MHz and other clocks

Low power, low voltage

The WM8978 CODEC can operate as a master or a slave. An

internal PLL can generate all required audio clocks for the

Codec from common reference clock frequencies, such as

12MHz and 13MHz.

The WM8978 operates at analogue supply voltages from 2.5V

to 3.3V, although the digital core can operate at voltages down

to 1.62V to save power. The speaker outputs and OUT3/4 line

outputs can run from a 5V supply if increased output power is

required. Individual sections of the chip can also be powered

down under software control.

2.5V to 3.6V (digital core: 1.62V to 3.6V)

power consumption <30mW all-on with 2.5V supplies

•

5x5mm 32-pin QFN package

APPLICATIONS

•

Stereo Camcorder or DSC

Product Preview, January 2005, Rev 1.7

WOLFSON MICROELECTRONICS plc

www.wolfsonmicro.com

12 3 4 5 6 7...78

中文翻译

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与WM8978GEFL相关器件

型号	品牌	获取价格	描述	数据表
WM8978GEFL/RV	WOLFSON	获取价格	STEREO CODEC WITH SPEAKER DRIVER
WM8978GEFL/V	WOLFSON	获取价格	STEREO CODEC WITH SPEAKER DRIVER
WM8980	WOLFSON	获取价格	STEREO CODEC WITH SPEAKER DRIVER AND BUFFER
WM8980_07	WOLFSON	获取价格	Stereo CODEC With Speaker Driver and Video Buffer
WM8980_12	WOLFSON	获取价格	Stereo CODEC with Speaker Driver and Video Buffer
WM8980CGEFL/RV	WOLFSON	获取价格	Stereo CODEC with Speaker Driver and Video Buffer
WM8980CGEFL/V	WOLFSON	获取价格	Stereo CODEC with Speaker Driver and Video Buffer
WM8980GEFL/RV	WOLFSON	获取价格	STEREO CODEC WITH SPEAKER DRIVER AND BUFFER
WM8980GEFL/V	WOLFSON	获取价格	STEREO CODEC WITH SPEAKER DRIVER AND BUFFER
WM8982GEFL/RV	CIRRUS	获取价格	PCM Codec, A/MU-Law, 1-Func, CMOS, PQCC32, 5 X 5 MM, 0.90 MM HEIGHT, 0.50 MM PITCH, LEAD F

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