Acer Aspire 3750 Acer Aspire 3750 Notebook Service Guide - Page 35

Audio Codec and Amplifier Item Audio Controller Features Amplifier Specification Realtek ALC271X-VB3-GR  Four channels stereo ADC support 16/20/24-bit PCM format  All DAC/ ADC support independent 44.1k/ 48k/ 96k/ 192 kHz sample rate  All analog jack ports except MONO, BEEP-IN and HP-OUT are stereo input and output re-tasking  Supports analog PCBEEP input, and a digital BEEP generator is integrated  Headphone amplifier on port-I (HP-OUT) is designed to drive output without external DC blocking capacitors  Software selectable 2.5V and 3.2V reference output for microphone bias  Software selectable boost gain (+10/+20/+30dB) for analog microphone input  Two jack detection pins: each supports detection of up to 4 jacks  Supports two GPIO pins  Supports EAPD (external amplifier power down) control for external amplifier  Supports anti-pop mode when analog power AVDD is on and digital power is off  Support 1.5V~3.3V scalable I/O for HD Audio link  48-pin LQFP 'Green' package  Jack detection function is supported when device is in power down mode (D3)  Realtek ALC271X-VB3-GR embedded Audio Interface Item Audio Controller Audio onboard or optional Mono or Stereo Resolution Compatibility Sampling rate Specification Realtek ALC271X-VB3-GR On board Stereo Support 16/20/24bit PCM HD audio Interface Sample rate up to 192Khz resolution VSR (Variable Sampling Rate) Hardware Specifications and Configurations 1-31