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Product Descriptions

CM102-A+/102S+ series is a highly integrated single chip for USB stereo speakers application. Minimum external components are needed for building an USB speaker system, which makes CM102-A+/102S+ a simple and very cost-effective solution. Since no driver is necessary for audio playback on all major OS. CM102-A+/102S+ provides a truly plug-and-play feature for external digital audio playback.

For energy saving, USB suspend mode and resume is supported by CM102-A+/102S+. With power amplifier enable pin and volume control VR input pin, a traditional speaker front panel design can be built. This new single chip not only support 44.1KHz and 48KHz sampling rate playback but also with X2 modulation for hi-frequency quality. Better yet, simplify anti-pop noise solution was embedded on chip for general pop noise issues. All of the functions have been approved by USB IF certification program. More flexible and customized design is possible with GPIO pin, which is accessible by USB vendor specific request.

This one chip solution not only embedded USB transceiver, ADC, DAC component but also integrated digital control power amplifier function for USB digital sound application. The Dynamic Range Control function can support high efficiency volume output to get loudness sound effect similar D class amplifier capability. Vender can just using single chip to saving external amplifier component and getting a better listen experience when listen to a music source with wide dynamic range.

Product Features

• USB 2.0 Full Speed Compatible and USB IF Certification

• USB audio device class specification v1.0 Compatible

• USB bus powered 500mA operation with suspend mode support

• USB audio function topology has 1 input terminal, 1 output terminal, and 1 feature unit

• Embedded high performance 16 bit stereo audio DAC

• Embedded Digital Control Power Amplifier for Speaker Driving

• Embedded power on reset block and Power amplifier enable / disable control pin

• Embedded X2 Modulation for Higher Audio Quality

• Embedded Anti-Pop Circuit with Internal Feedback Structure

• Embedded 5V to 3.3V Regulator with Voltage Level Detector for Single 5V External Power Supply

• Alternate zero bandwidth setting for releasing bandwidth on USB bus during inactive operation

• Single 12MHz crystal input with on-chip PLL and embedded USB transceiver

• Support Dynamic Range Control (DRC) Feature to Provide a Better Listen Experience

• Volume control input with simple external VR circuit

• Isochroous transfer using adaptive synchronization with internal PLL

• High performance 16-Bit Stereo, 48 / 44.1 KHz Sampling Rate for Audio Playback

• 3.3V IO with 5V tolerance; 3.3V core logics design

• GPIO pin for application specific usage

• Support S/PDIF output interface

• LED Indicator Pin During Playback

• Compact 18 pin PDIP and SOP package

  Specifications

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