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參數資料
| 型號： | WM8974 |
| 廠商： | Wolfson Microelectronics |
| 英文描述： | 2-WIRE CHOPPER STABILIZED LATCH |
| 中文描述： | 單聲道編解碼器揚聲器驅動器 |
| 文件頁數： | 1/63頁 |
| 文件大小： | 795K |
| 代理商： | WM8974 |
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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PDF資料 |
PDF描述 |
|---|---|
| WM8974GEFL | 2-WIRE CHOPPER STABILIZED LATCH |
| 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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| WM8974_07 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Mono CODEC with Speaker Driver |
| WM8974-6162-FL24-M | 制造商:Wolfson Microelectronics 功能描述:Mini Evaluation Board for WM8974 |
| WM8974-6162-FL24-M-S | 功能描述:音頻 IC 開發工具 WM8974 MINI Eval Board System RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| WM8974CGEFL/RV | 制造商:Wolfson Microelectronics 功能描述:1.8-3.6 V Single Ch 2 Wire Interface Mono Codec w/ Speaker Driver - QFN-24 制造商:Wolfson Microelectronics 功能描述:Mono Codec with Spkr |
| WM8974CGEFL/V | 制造商:Wolfson Microelectronics 功能描述:codec 制造商:Wolfson Microelectronics 功能描述:Mono Codec with Spkr |
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