ALC5672

Description

The ALC5672 is a high performance, low power, dual I2S interface audio CODEC with embedded low power/high performance Voice DSP. Dual I2S interface can connect to different devices and let the ALC5672 to be an Audio Hub. Each device can pass through the Audio Hub and then perform as input or output application. Asynchronous Sample Rate Converter (ASRC) provides independent and asynchronous connections to different processors, such as an application processor, baseband processor or wireless transceiver(BT).

Stereo Class-D speaker amplifiers provide 1.5W per channel into 8Ω or 2.8W per channel into 4Ω with a 5V supply, with high THD+N performance, excellent PSRR and low EMI. A mono differential earpiece amplifier is also provided, providing output from any DAC or Analog-in.

The ALC5672 features an ultra low power cap-free headphone amplifier. It consumes only less than 5mW power during playback, providing mobile system longer battery life under headphone listening mode.

The integrated multi-section DRC(Dynamic Range Controller) and 14-band parametric Equalizer provide further digital sound processing capability of audio playback paths. The multi-section DRC in ALC5672 continuously monitors the DAC output level. When the power level is low, it increases the input signal gain to make it sound louder. At the same time, if a peaking signal is detected, it autonomously reduces the applied gain to avoid hard clipping. It ensures the maximum/consistent signal amplitude without producing audio clipping and speaker damage. The 14-band parametric Equalizer contains each channel has 7 independent filters with programmable gain, center frequency and bandwidth to tailor the frequency characteristics of embedded speaker system according to user preferences.

For microphone recording, the DRC in ALC5672 can be used as AGC(Auto Gain Controller) to maintain a constant recording volume. Besides, a dynamic wind reduction filter is built in on recording path. The filter can detect the level of wind noise and on/off dynamically to keep the recording quality. The ALC5672 also integrates independent 6-band parametric Equalizer for recording path. They can use to compensate microphone device frequency response.

ALC5672 embedded a low power, high performance voice processor. The 120MIPS voice processor provides advanced voice processing features, including exceptional noise suppression, echo cancellation and advanced Beam-Forming under low power consumption. The voice processor is optimized for advanced voice processing to improve voice quality for voice communication and recording in noisy environments.

SounzRealTM post-processing technology is configurable to provide better listening experience. BassBack EXPTM bring LFE(low frequency effect) to listeners without subwoofer needed. TruTreble EXPTM adds processed harmonic tones at high frequency, bringing more melody and details for music listening.

Features

· Digital Super Wideband Voice DSP
Voice communication enhancement (AEC, NS…etc.)
Advanced Beam-Forming (Voice Tracking)
Stereo Far field pick-up recording (48KHz Sample Rate)
· SounzReal TM post-processing
TruTreble
BassBack
· Parametric 14 bands equalizer (EQ) – each 7 bands for L/R playback path independent control
· Parametric 6 bands equalizer (EQ) for recording path
· Advanced DRC with multi-section compressor function for playback/recording path
· Sound detection wake up technology
· Wind noise reduction filter
· One 24bit/8kHz ~ 192kHz I2S/PCM/TDM digital interface
· One 24bit/8kHz ~ 192kHz I2S/PCM digital interface
· Digital asynchronous sampling rate converter (ASRC) function
· I2C control interface
· 3 stereo digital microphone interfaces
· 4 Digital-to-Analog Converter with 100dBA SNR
· 2 Analog-to-Digital Converter with 94dBA SNR
· 2 single-ended analog microphone inputs with pre-amplifiers (+20/24/30/35/40/44/50/52dB) and low noise microphone bias
MIC input to ADC with 50dB Boost, SNR>66dBA, THD+N<-65dB
Headset microphone and ground auto switch
· Stereo line input
-85dB THD+N (with 0dB gain path)
94dBA SNR (with 0dB gain path)
· Stereo single-ended/mono differential line output
-85dB THD+N (with 0dB gain path, 10k ohm loading)
100dBA SNR (with 0dB gain path, 10k ohm loading)
· Stereo BTL (Bridge-Tied Load) Class-D amplifier
700mW/CH (AVDD=1.8V, SPKVDD=3.6V, THD+N <= 1%, 8Ohm)
* 600mW/CH (AVDD=1.8V, SPKVDD=3.6V, THD+N <= 0.1%, 8Ohm)