CX20665 HD Audio Codec with 2W Mono Class-D, Dual Capless HP, Jack Retasking, SPDIF In and Out Features 2 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 2 WRMS mono Class-D Two capless headphone ports eliminate BOM Multiple Line Outputs Multiple input/output retaskable ports Microphone to Headphone re-tasking Hardware digital crossover for subwoofer Integrated boost for all microphones Independent SPDIF input and output Integrated regulators maximize performance Record Security Control Integrated headphone limiter (GS Mark) D-Flex Power Management minimizes power consumption Wake on PC BEEP 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 1.5 V/3.3 V link signaling Available in 48-QFN package Overview Conexant's CX20665 is a low-power, 102 dB SNR HD Audio codec with integrated 2WRMS filterless mono Class D speaker amplifier using Spread Spectrum dispersion technology to prevent EMI. Two independent pairs of DACs and three independent pairs of ADCs support multi-Streaming and Real Time Communications applications. The audio fidelity of the device exceeds Microsoft Premium Logo requirements. 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. Multiple stereo Line Outputs are available as well as multiple retaskable ports including Microphone/Line in, Microphone/Line In/Line Out, and Line In/Line Out retasking. Microphone/Line In/Headphone re-tasking is also supported. All output ports feature PopShield technology that eliminates pops and clicks. The codec 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. 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. Block Diagram Software SmartAudio GUI Voice Processing Algorithms include end-to-end Noise Reduction, multiband 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 Embedded Audio Point Of Sale Systems Part Number CX20665 Description High-Definition Audio Codec Analog Performance Characteristics Parameter Minimum Typical Maximum Units Line Outputs Full Scale Output Voltage Dynamic Range (measured with -60 dBFS signal present) Total Harmonic Distortion + Noise (THD + N) Channel Crosstalk Analog Frequency Response (+/- 3 dB at 20 Hz, +/- 1 dB at 20000 Hz) 1.0 100 -85 -84 20 20000 Vrms dBFS dB dBFS Hz 20000 Vrms dBFS dB dBFS Hz Headphone Output Full Scale Output Voltage Dynamic Range (measured with -60 dBFS signal present) Total Harmonic Distortion + Noise (THD + N) Channel Crosstalk Analog Frequency Response (+/- 3 dB at 20 Hz, +/- 1 dB at 20000 Hz) 1.2 99 -87 -75 20 Class-D Speaker Amplifier Outputs Full Scale Output Voltage (into 4 Ω) 3.96 2.83 Dynamic Range (measured with -60 dBFS signal present) Total Harmonic Distortion + Noise (THD + N, measured at -3 dBFS) Analog Frequency Response (+/- 3 dB at 20 Hz, +/- 1 dB at 20000 Hz) Efficiency (Measured at 1 W/Ch) 4.0 2.90 94 -71 4.2 3 20 20000 85 Vp Vrms dBFS dBFS Hz % Microphone/Line Inputs Full Scale Input Voltage (With 20 dB boost) Full Scale Input Voltage (With boost off) Dynamic Range (measured with -60 dBFS signal present) Total Harmonic Distortion + Noise (THD + N) Channel Crosstalk (measured at 1 kHz, 0 dB gain) Analog Frequency Response (+/- 3 dB at 200 Hz, +/- 1 dB at 20000 Hz) Input Resistance 0 dB 10-40 dB Input Capacitance 0.1 1.0 Vrms 91 -87 -84 200 20000 15.8 5.0 5 dBFS dBFS dBFS Hz kΩ pF Ordering Information Device Order Number CX20665-11Z Model/Order/Part Numbers Audio Codec Revision Part Number CX20664 -11Z Audio Codec Package Type Supported Functions Integrated Mono Number of Class-D Amplifier DACs/ADCs 48-QFN © 2012 Conexant Systems, Inc. All Rights Reserved. Conexant and the Conexant logo are registered trademarks of Conexant Systems, Inc. All other trademarks are owned by their respective owners. Although Conexant strives for accuracy in all its publications, this material may contain errors or omissions and is subject to change without notice. THIS MATERIAL IS PROVIDED AS IS AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING MERCHANT ABILITY, FITNESS FOR A PAPARTICULAR PURPOSE AND NON-INFRINGEMENT. Conexant shall not be liable for any special, indirect, incidental or consequential damages as a result of its use. Y www.conexant.com General Information: U.S. and Canada: (888) 855-4562 International: 1+ (949) 483-3000 Headquarters 4000 MacArthur Blvd. Newport Beach, CA 92660 Doc# PBR-203100 6/4 Operating Temperature 0 to 70 oC