Acer Aspire 7750Z Acer Aspire 7750, 7750G, 7750Z Notebook Service Guide - Page 47

Audio Codec and Amplifier Item Audio Controller Features Specification Audio codec: Realtek ALC271X-VB3  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 input  4-channel DAC supports 16/20/24-bit PCM format for independent two stereo channel or 2.1 audio playback  4-channel ADC supports 16/20/24-bit PCM format for independent two stereo channel audio inputs  All DACs supports 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 boost 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  2 GPIOs are supported for customized applications (pin shared with digital microphone interface)  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 per channel output  Short circuit and thermal overload protection for Class-D amplifier  48-pin QFN 'Green' package Hardware Specifications and Configurations 1-37