參數(shù)資料
型號(hào)： WM8974GEFL
廠商： Wolfson Microelectronics
英文描述： 2-WIRE CHOPPER STABILIZED LATCH
中文描述： 單聲道編解碼器揚(yáng)聲器驅(qū)動(dòng)器
文件頁(yè)數(shù)： 1/63頁(yè)
文件大?。?/td> 795K
代理商： WM8974GEFL
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WM8974
Mono CODEC with Speaker Driver
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
Product Preview, September 2004, Rev 1.1
Copyright
2004 Wolfson Microelectronics plc
DESCRIPTION
The WM8974 is a low power, high quality mono codec
designed for portable applications such as Digital Still Camera
or Digital Voice Recorder.
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.
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.
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 core can operate at voltages down to
1.62V 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.
WM8974 is supplied in a very small 4x4mm QFN package,
offering high levels of functionality in minimum board area,
with high thermal performance.
FEATURES
Mono Codec:
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 90dB, THD -80dB (‘A’-weighted @ 8 – 48ks/s)
On-chip Headphone/Speaker Driver with ‘cap-less’ connect
- 40mW output power into 16
/ 3.3V SPKRVDD
- BTL speaker drive 0.9W into 8
/ 5V SPKRVDD
Additional MONO Line output
Multiple analog or ‘Aux’ inputs, plus analog bypass path
Mic Preamps:
Differential or single end Microphone Interface
- 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
Low power, low voltage
- 2.5V to 3.6V (digital core: 1.62V to 3.6V)
- power consumption <10mA all-on 48ks/s mode
4x4x0.9mm 24 pin QFN package
APPLICATIONS
Digital Still Camera Audio Codec
General Purpose low power audio CODEC
相關(guān)PDF資料
PDF描述
WM8978 STEREO CODEC WITH SPEAKER DRIVER
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
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
WM8974GEFL/RV 功能描述:接口—CODEC Mono Codec with Spkr RoHS:否 制造商:Texas Instruments 類(lèi)型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類(lèi)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
WM8974GEFL/V 功能描述:接口—CODEC Mono Codec with Spkr RoHS:否 制造商:Texas Instruments 類(lèi)型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類(lèi)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
WM8976 制造商:WOLFSON 制造商全稱(chēng):WOLFSON 功能描述:Stereo CODEC With Speaker Driver
WM8976_06 制造商:WOLFSON 制造商全稱(chēng):WOLFSON 功能描述:Stereo CODEC With Speaker Driver
WM8976_11 制造商:WOLFSON 制造商全稱(chēng):WOLFSON 功能描述:Stereo CODEC with Speaker Driver
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