Acer ASPIRE 4253 - Audio Codec and Amplifier

1-38 Hardware Specifications and Configurations
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