- 您現在的位置：買賣IC網 > PDF目錄363965 > WM8978 (Wolfson Microelectronics) STEREO CODEC WITH SPEAKER DRIVER PDF資料下載
參數資料
| 型號： | WM8978 |
| 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聲器驅動器 |
| 文件頁數： | 1/78頁 |
| 文件大小： | 927K |
| 代理商： | WM8978 |
當前第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁
w
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
相關PDF資料 |
PDF描述 |
|---|---|
| WM8978GEFL | STEREO CODEC WITH SPEAKER DRIVER |
| WM8983GEFL | Mobile Multimedia CODEC with 1W Speaker Driver |
| WM8983GEFLR | CRYSTALS 50/100 0+70 18PF 12.288MHZ AT CUT FUND HC-49/U |
| WM8983 | Mobile Multimedia CODEC with 1W Speaker Driver |
| WM9701 | Low Power AC97 Multimedia Audio Codec |
相關代理商/技術參數 |
參數描述 |
|---|---|
| WM8978_06 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Stereo CODEC With Speaker Driver |
| WM8978-6160-FL32-M-S | 制造商:Wolfson Microelectronics 功能描述:Evaluation Board for WM8978 Series |
| WM8978CGEFL/RV | 制造商:Wolfson Microelectronics 功能描述:WM8978 Series 2.5 - 3.6 V 2 Ch CODEC w/ Speaker Driver - QFN-32 制造商:Wolfson Microelectronics 功能描述:Stereo Codec w H/P SPKR |
| WM8978CGEFL/V | 制造商:Wolfson Microelectronics 功能描述:Stereo Codec w H/P SPKR |
| WM8978GEFL | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:STEREO CODEC WITH SPEAKER DRIVER |
發布緊急采購，3分鐘左右您將得到回復。