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Waveshare Electronics
Address: Rm 813, Dynamic World Building, Zhenhua Rd, Futian District, Shenzhen, China
TEL: +86-755-83040832
Web: http://www.wvshare.com/
FAX: 86-755-83042572
E-mail: sales@wvshare.com
2.4 I2S Audio Input/output Interface
I2S Audio Circuit adopts Wolfson Microelectronics audio converter chip--WM8960, which is a low power, high quality stereo
coder-decoder, especially designed for portable digital audio applications.
WM8960 integrates a complete microphone interface and a stereo headphone driver, as there is no need separate microphone,
speaker or headphone amplifiers, which greatly reduces the external component requirements. The advanced digital signal
processing realizes the automatic level control of microphone or circuit input.
The stereo uses 24-bit sigma-delta analog digital converter (ADC) and digital analog converter (DAC), while using a low power
oversampling digital interpolation and decimation filters, as well as a flexible digital audio interface. Master clock can be input
directly or generated by the built-in internal phase-locked loop, which supports the most common clock mode.
WM8960 operates at analogue supply voltages as low as 2.7V. To save power, the digital core can operate at voltages down to
1.7V. The speaker supplies voltage 5.5V superlatively, and each channel's output can be 1W8Ω load, other power voltage is up
to 3.6V. Different parts of the chip can be turned off by software control. Using 5*5mm 32pins QFN package, it's ideal for
making handheld and portable devices.
Diameter 3.5mm Headphone output interface (green):
Waveshare Electronics
www.waveshare.com
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