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)
BLOCK DIAGRAM