Acer Aspire 3750 Service Manual page 35

Audio Codec and Amplifier
Item
Audio Controller
Features
Amplifier
Audio Interface
Item
Audio Controller
Audio onboard or optional
Mono or Stereo
Resolution
Compatibility
Sampling rate
Hardware Specifications and Configurations
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

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)
Specification
Specification
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