Acer Aspire E1-521 Acer Aspire E1-521 Notebook Service Guide - Page 33

Audio Codec and Amplifier Item Audio Controller Features Specification Realtek ALC271X-VB6-CG • 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 • Supports external PCBEEP input and built-in digital BEEP generator. • Software selectable 2.5V/3.2V VREFOUT as bias voltage for analog 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 • Built in a 5V-to-4.5V linear regulator with 60dB PSRR to power analog circuitry • 48-pin QFN 'Green' package Audio Codec and Amplifier Item Amplifier Features Specification Integrated on Audio Codec See Audio Codec Features Hardware Specifications and Configurations 1-26