Acer Aspire 5349 Aspire 5349, 5749, 5749Z Service Guide - Page 45

Audio Codec and Amplifier Item Audio Controller Features Realtek ALC271X Specification  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 1-35