CM6648
INTRUDUCTION

The CM6648 is a USB 2.0 high-speed audio chip with high performance audio codec which is targeting high-end USB type-C headset, microphone and USB-to-3.5mm Jack audio device. It combines stereo DAC and mono ADC, audio interface I2S, control interface I2C, and embedded flash to provide a highly-integrated audio solution. The CM6648 also supports UAC3.0 LPM L1 and is equipped with a stereo low power cap-free Class-G headphone amplifier of 122dB SNR and 96dB THD+N performance, providing longer battery life and Hi-Fi listening experiences.
 

PRODUCT BENEFIT
  • UBS 2.0 high-speed interface supports audio data up to 384K/32bits
  • USB 2.0 High-Speed with UAC1.0/2.0 and 3.0 LPM L1
  • High-performance audio codec of 122dB SNR Stereo DAC and 99dB SNR Mono ADC
  • Embedded 8051 MCU with internal 256KB flash
  • Ultra-low-power consumption: 19mA @idle / 35mA @active
PRODUCT FEATURES
USB Compliance
  • USB 2.0 Full-Speed and High-Speed
  • USB Audio Class 1.0/2.0 and 3.0 LPM L1  
  • Audio data supports up to 32-bits data length and 384K sampling rate
 
Audio I/O
  • 2-Ch DAC 122dB SNR and 96 THD+N
  • 1-Ch ADC 99dB SNR and 95 THD+N
  • EQ 12 bands (6+6 bands) shared for playback or record path
  • Audio Data
    • Playback path: 44.1K~384KHz with 16/24/32-bits
    • Recording path: 44.1K~192KHz with 16/24-bits
    • Side-Tone path: 44.1K~192KHz with 16/24-bits
 
Control Interfaces
  • Embedded 8051 MCU and 256KB flash memory
  • Master I2C control interface
  • Max. 4 GPIOs configurable, 2 of them can be set to PWM for LED dimming
 
General
  • Support jack detection Wake-Up
  • Support 3-pole and 4-pole headset with OMTP and CTIA jack detection
  • Support Crystal-less and external crystal
  • Ultra-low-power: 0.4mA @suspend, 26mA @active
  • Package QFN-48 (6.5X5mm)
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