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WM8940CGEFL/RV 数据表 (PDF) - Cirrus Logic

WM8940CGEFL/RV Datasheet PDF - Cirrus Logic
部件名 WM8940CGEFL/RV
下载  WM8940CGEFL/RV 下载

文件大小   1456.38 Kbytes
  88 Pages
制造商  CIRRUS [Cirrus Logic]
网页  http://www.cirrus.com
标志 CIRRUS - Cirrus Logic
功能描述 Mono CODEC with Speaker Driver

WM8940CGEFL/RV Datasheet (PDF)

Go To PDF Page 下载 数据表
WM8940CGEFL/RV Datasheet PDF - Cirrus Logic

部件名 WM8940CGEFL/RV
下载  WM8940CGEFL/RV Click to download

文件大小   1456.38 Kbytes
  88 Pages
制造商  CIRRUS [Cirrus Logic]
网页  http://www.cirrus.com
标志 CIRRUS - Cirrus Logic
功能描述 Mono CODEC with Speaker Driver

WM8940CGEFL/RV 数据表 (HTML) - Cirrus Logic

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WM8940CGEFL/RV 产品详情

DESCRIPTION
The WM8940 is a low power, high quality mono CODEC designed for portable applications such as digital still cameras or camcorders.
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. A selectable high pass filter and four fully-programmable notch filters are available in the ADC path. An advanced mixed signal ALC function with noise gate is provided, while readback of PGA gain during ALC operation is supported. The digital audio interface supports A-law and -law companding.
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 WM8940 operates at supply voltages from 2.5 to 3.6V, although the digital supplies can operate at voltages down to 1.71V to save power. Different sections of the chip can also be powered down under software control using the selectable two or three wire control interface.
WM8940 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 94dB, THD -80dB (‘A’-weighted @ 8 – 48ks/s)
• On-chip Headphone/Speaker Driver
- 40mW output power into 16
- BTL speaker drive 0.4W into 8
• Additional MONO Line output
• Multiple analogue or ‘Aux’ inputs, plus analogue bypass path
• Mic Preamps:
• Differential or single end Microphone Interface
- Programmable preamp gain
- Pseudo differential inputs with common mode rejection
- Programmable ALC / Noise Gate in ADC path
• Low-noise bias supplied for electret microphones
OTHER FEATURES
• Digital Playback Limiter
• Programmable high pass filter (wind noise reduction)
• 4 notch filters (narrowband noise suppression)
• On-chip PLL
• Low power, low voltage
- 2.5V to 3.6V (digital: 1.71V to 3.6V)
• 4x4x0.9mm 24 lead QFN package

APPLICATIONS
• Digital still cameras and camcorders
• General purpose mono audio CODEC




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关于 Cirrus Logic


Cirrus Logic是一家美国公司,专门从事高精度模拟和混合信号综合电路(ICS)的设计和制造。
该公司成立于1984年,总部位于美国德克萨斯州奥斯汀。
Cirrus Logic提供了广泛的产品,包括音频转换器,音频编解码器,数字信号处理器以及其他模拟和混合信号IC。
该公司的产品用于各种应用,例如消费电子,汽车音频系统和专业的音频设备。
Cirrus Logic以其在音频和语音处理领域的模拟和混合信号技术,高质量产品以及创新方面的专业知识而闻名。

*此信息仅供一般参考,对于因上述信息造成的任何损失或损害,我们概不负责。




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