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參數(shù)資料
| 型號(hào)： | WM8978GEFL |
| 廠商： | Wolfson Microelectronics |
| 元件分類： | Codec |
| 英文描述： | STEREO CODEC WITH SPEAKER DRIVER |
| 中文描述： | 立體聲編解碼器與揚(yáng)聲器驅(qū)動(dòng)器 |
| 文件頁數(shù)： | 1/78頁 |
| 文件大小： | 927K |
| 代理商： | WM8978GEFL |
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Stereo CODEC With Speaker Driver
WM8978
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
Product Preview, January 2005, Rev 1.7
Copyright
2005 Wolfson Microelectronics plc
DESCRIPTION
The WM8978 is a low power, high quality stereo codec
designed for portable applications such as Digital still camera or
Digital Camcorder.
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.
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’.
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.
FEATURES
Stereo Codec:
DAC SNR 98dB, THD -84dB (‘A’ weighted @ 48kHz)
ADC SNR 90dB, THD -80dB (‘A’ weighted @ 48kHz)
On-chip Headphone Driver with ‘capless’ option
-
40mW output power into 16
/ 3.3V SPKVDD
0.9W output power into 8
BTL speaker / 5V SPKVDD
-
Capable of driving piezo speakers
-
Stereo speaker drive configuration
Mic Preamps:
Stereo Differential or mono microphone Interfaces
-
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
-
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
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| WM9701 | Low Power AC97 Multimedia Audio Codec |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| WM8978GEFL/RV | 功能描述:接口—CODEC STR CODEC w/HP SPKR 32-pin RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| WM8978GEFL/V | 功能描述:接口—CODEC Stereo Codec with H/P Spkr RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| WM8980 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:STEREO CODEC WITH SPEAKER DRIVER AND BUFFER |
| WM8980_07 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Stereo CODEC With Speaker Driver and Video Buffer |
| WM8980_12 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Stereo CODEC with Speaker Driver and Video Buffer |
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