Audio Codec And Amplifier - Acer Aspire 7750Z Service Manual

Audio Codec and Amplifier

Item
Audio Controller
Features
Hardware Specifications and Configurations
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

Specification
1-37