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Realtek PDF datasheets for ALC3261

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File type


File name alc3261_datasheet_0.91.pdf
Datasheet version 0.91
Release 2012-05-28  [May '12]
File size 1,21 MB
Downloaded 55×

Realtek PDF datasheet ALC3261 for free download

Designed for the following chipset:
- ALC3261-CG
- ALC3261-CGT

The ALC3261 is a low power, dual I2S interface, 4 channels DAC and 2 channel ADC Audio Codec with a optimized Voice DSP integrated. The primary I2S interface connects to system host chip and its secondary I2S interface can perform as input or output device connected to external processor, blue tooth device or wireless transceiver.

ALC3261 is a highly integration of audio subsystem chip, including two stereo DACs with 100dB SNR, one stereo ADC with 94dB SNR, stereo Class-D speaker amplifiers provides 1.5W per channel into 8Ω or 2.5W per channel into 4Ω with a 5V supply with excellent PSRR and low EMI, a mono differential earpiece amplifier is also provided, providing output from any DAC or Analog-in.

The ALC3261 features an extra low power cap-free headphone amplifier. It consumes only less than 10mW power during playback, providing tablet system longer battery life under headphone listening mode.

The integrated DRC (Dynamic Range Controller) and parametric Equalizer provides further digital sound processing capability of audio playback paths. The DRC in ALC3261 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 parametric Equalizer contains 7 independent filters with programmable gain, center frequency and bandwidth to tailor the frequency characteristics of embedded speaker system according to user preferences.

ALC3261 embedded a low power wideband voice DSP. This optimized voice DSP provides excellent noise suppression, echo cancellation and beam forming performance. It combines 8 kHz and 16 kHz sampling rate and 75MIPS digital signal processing capability to achieve high fidelity and non-stationary wideband performance.

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