Audio Codec and Amplifier Specification

Audio Codec and Amplifier

Item	Specification

Audio	Realtek ALC271X
Controller

Features	 Meets WLP (Windows Logo Program) requirements for Windows XP,
	Vista and Windows 7

98dB Signal-to-Noise Ratio (A-weighting) for DAC output

90dB Signal-to-Noise Ratio (A-weighting) for ADC output

4-channel DAC supports 16/20/24-bit PCM format for indepent two stereo channel or 2.1 audio playback

4-channel ADC supports 16/20/24-bit PCM format for indepent two stereo channel audio inputs

All DACs support 44.1k/48k/96k/192kHz sample rate

All ADCs support 44.1k/48k/96k/192kHz sample rate

S/PDIF-OUT support 16/20/24-bit format and 44.1/48/88.2/96/192kHz rate

Supports MONO line level output

Supports external PCBEEP input and built-in digital BEEP generator

Software selectable 2.5V/3.2V VREFOUT as bias voltage for analog microphone input

Programmable +12/+24/+36dB boot gain for analog microphone input

Supports stereo digital microphone input

Programmable boost gain and volume control for digital microphone input

Built-in headphone amplifiers for port-C (LINE1) and port-I(HP OUT)

Headphone amplifier for port-I does not require DC blocking capacitors

Two jack detection pins each designed to detect up to 4 jacks, and S/PDIF-OUT jack detection is supported

EAPD (External Amplifier Power Down) is supported

Supports Anti-pop mode when analog power AVDD is on and digital power is off

Power support: 3.3V digital core power: 1.5V~3.3V digital IO power for HDA link; 3.0V~5.5V analog power; 4.5V~5.5V power stage voltage

Enhanced power management features for normal operation and standby mode

Stereo Bridge-Tied Load Class-D amplifier at port-D has 2Watt (rms)/4 Ohms per channel output

Short circuit and thermal overload protection for Class-D amplifier

Class D amplifier has high pass filter with programmable Cut-Off frequency (10Hz~900Hz) to prevent low frequency signal damage speaker

Class D amplifier output with slew rate and spread spectrum control to improve EMI performance

Independent left and right channel of output power limiter (25%~100% power range) to protect speaker

Hardware Specifications and Configurations

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