Acer 4253G manual Audio Codec and Amplifier Specification

Audio Codec and Amplifier

Item	Specification
Audio Controller	Conexant 20584
Features	24-bit, 2 pairs of independent DACs and 3 pairs of independent ADCs
	ProCoustic headphone driver delivers 50 mW into 32 ohm load with no
	pop, eliminating the need for an external amplifier and DC-blocking
	capacitors
	Integrated 5 V to 3.3 V low-dropout voltage regulator for improved audio
	performance, eliminating need for external regulator or power transistor.
	Integrated 3.3 V to 1.8 V low-dropout voltage regulator, used to power
	digital blocks
	Integrated 2 WRMS (per channel) class-D stereo speaker amplifier with
	Spread Spectrum and 10-kV ESD withstand capability
	Digital Microphone interface with internal MIC boost supporting 2 digital
	microphone elements
	Works with all digital microphones.
	Internal microphone boost
	Digital: 0, 12, 24, 36, 48 dB
	Analog: 0, 10, 20, 30, 40 dB
	Microphone Security Control
	Please contact Conexant Sales/FAE for additional confidential document
	to disable the bit in microphone from the BIOS.
	Exceeds Windows Vista and Windows 7 Desktop and Notebook Premium
	Logo
	Requirements, WLP4.0
	D-Flex power management exceeds Intel ECR 15B requirements, and
	features Wake-On-PCBeep functionality
	Hardware Headphone limiter bit (supports GS Mark EN50332-2)
	Compliant with Intel High Definition Audio Specification Rev. 1.0
	Supports both 1.5 V and 3.3 V signaling with the core logic chipset
	Retaskable ports
	Configure between Headphone and Line-out or between Mic and Line-in
	Independent sampling rate for DAC and ADC; supports audio formats
	ranging from 16-bit, 44.1 kHz to 24-bit, 192 kHz for DACs, and from 16-bit,
	44.1 kHz to 24-bit, 96 kHz for ADCs.
	Pop Shield: pops and clicks reduction circuitry, including class-D speaker
	outputs
	Jack sense detects up to 8 jacks using only two sense pins
	Dual Sony Philips Digital Interface (S/PDIF) outputs
	Digital Mixer
	Simultaneous DAC and SPDIF engines
	+3.3 V analog and I/O operation; uses Vaux for power management
	modes
Amplifier	CX20584 embedded amplifier

1-38 Hardware Specifications and Configurations