CX20632 5.1 HD Audio Codec with 2W Class-D, Dual
Capless HP, Jack Retasking, and SPDIF In and Out
Features
Overview
Conexant's CX20632 is a low-power, 102 dB SNR HD Audio codec with integrated mono
2-WRMS filterless Class D speaker amplifier using Spread Spectrum dispersion
technology to prevent EMI. Three independent pairs of DACs and three independent
pairs of ADCs support multi-Streaming and Real Time Communications applications and
enable 5.1 multi-channel audio. The audio fidelity of the device exceeds Microsoft
Premium Logo requirements.
3 pairs of independent DACs and 3
pairs of independent ADCs
Sampling rates include 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.
Integrated mono 2 WRMS class-D
amplifier
Two ProCoustic capless headphone drivers deliver 31 mW per channel into 32 Ω loads
and eliminate external DC blocking capacitors. Built-in support for 4-conductor-type
headset combo jacks saves space and system BOM cost.
Two capless headphone ports
eliminate BOM
Multiple Line Outputs for 5.1 audio
Hardware digital crossover for
subwoofer
Multiple Line Outputs are available for driving external powered speakers for 5.1 audio
on 3 or 5 jacks or higher powered integrated speaker amplifiers. Multiple retaskable ports
are available, including Microphone/Line in, Microphone/Line In/Line Out, and Line In/
Line Out retasking. All output ports feature PopShield technology that eliminates pops
and clicks.
Multiple input/output retaskable ports
Stereo Digital Microphone interface
Integrated boost for all microphones
Independent SPDIF input and output
Integrated regulators maximize
performance
Microphone Security Control
Integrated headphone limiter (GS
Mark)
The codec features a stereo digital microphone interface that includes a hardware DC-
level filter to remove DC offset and provides the clock output. It also includes one SPDIF
output and one SPDIF Input both supporting sample rates up to 192 kHz, 16-24-bit
resolution. Multiple GPIO's are provided, including speaker mute and EAPD functions.
Hardware volume control support push button and rotary volume knobs.
D-Flex Power Management minimizes
power consumption
Wake on PC BEEP
Integrated 5 V to 3.3 V and 3.3 V to 1.8 V Low Dropout (LDO) regulators guarantee high
performance analog audio and clean power to internal digital blocks. Conexant's D-Flex
power management allows the system to exceed the power savings specified in the Intel
ECR 15B. The internal Wake-on-BEEP logic resumes the analog paths for the PC BEEP
to the output ports. Analog and Digital power rails can be dropped in S3/S4/S5 to
maximize power savings and EuP compliance.
PopShield eliminates pops and clicks
Fidelity exceeds Microsoft WHCK
requirements
Jack sense detects up to 8 jacks
Digital Mixer
Compliant with all Intel High Definition
Audio Specifications
Selectable 1.5V/3.3 V link signaling
Available in 48-QFN package
Block Diagram
Software
SmartAudio GUI
Voice Processing Algorithms include
end-to-end Noise Reduction, multi-
band AEC, and Beam Forming
10 band Speaker EQ and DRC
3D Expander
Third-party software support includes
Andrea, Creative Labs, Dolby,
Fortemedia, Waves MaxxAudio, SRS,
and DTS
Supports 32-bit/64-bit Windows/Linux
Applications
Desktop PCs
Multi-channel Notebooks
All In One PCs
Embedded Audio
Sound Bars
Part Number CX20632
Description 5.1 HD Audio Codec
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