CX20642/CX20652 5.1 HD Audio CODEC AudioSmart™ Product Brief 2.8W Mono Class-D, Dual Capless HP, Jack Re-Tasking, S/PDIF In and Out Product Overview Key Features Conexant's CX20642 is a low-power, 102dB SNR HD audio CODEC with an integrated mono 2.8WRMS filterless class-D speaker amplifier using Spread Spectrum dispersion technology to prevent EMI. The CX20652 offers identical functionality, but without classD. 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’s Premium Logo requirements. • Two ProCoustic capless headphone drivers deliver 31mW per channel into 32W loads, and eliminate external DC blocking capacitors. Built-in support for a four-conductor type headset combo jacks saves space and system BOM cost. Multiple stereo line outputs are available for driving external powered speakers for 5.1 audio on three or five jacks, and a mono line output is also available. Multiple re-taskable ports are available, including microphone/ line-in, microphone/line-in/line-out, and line-in/line-out re-tasking. All output ports feature PopShield technology to eliminate pops and clicks. The CX20642/CX20652 also includes one S/PDIF output and one S/PDIF input, and both support sample rates up to 192kHz, 16-bit to 24-bit resolution. Multiple GPIOs are provided, including speaker mute and EAPD functions. Hardware volume control supports push button and rotary volume knobs. Integrated 5V to 3.3V and 3.3V to 1.8V 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. Applications • • • Desktop PCs Embedded audio Sound bars Conexant Confidential • www.conexant.com • 019-4252PBR00 • • • • • • • • • • • • • • • • • • • • • Three pairs of independent DACs, and three pairs of independent ADCs Sampling rates include: – 16-bit, 44.1kHz to 24-bit, 192kHz for DACs – 16-bit, 44.1kHz to 24-bit, 96kHz for ADCs Integrated mono 2WRMS class-D amplifier Two capless headphone ports eliminate BOM costs Multiple line outputs for 5.1 audio Hardware digital crossover for subwoofer Multiple input/output re-taskable ports Microphone to headphone re-tasking Integrated boost for all microphones Independent S/PDIF 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 eight jacks Digital mixer Compliant with all Intel HD audio specifications Selectable 1.5V/3.3V link signaling Available in 48-QFN package System Block Diagram CX20642/CX20652 5.1 HD Audio CODEC | AudioSmart™ Product Brief Software • • • • SmartAudio GUI Voice processing algorithms include end-to-end noise reduction, 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 Analog Performance Characteristics Parameter Line Outputs Full-scale Output Voltage Dynamic Range (Measured with –60dBFS Signal Present) THD+n Channel Crosstalk Analog Frequency Response (±3dB at 20Hz and ±1dB at 20000Hz) Headphone Output Full-scale Output Voltage Dynamic Range (Measured with –60dBFS Signal Present) THD+n Channel Crosstalk Analog Frequency Response (±3dB at 20Hz and ±1dB at 20000Hz) Class-D Speaker Amplifier Outputs (for CX20642 only) Full Scale Output Voltage (into 4) Dynamic Range (Measured with –60dBFS Signal Present) THD+n (Measured at –3dBFS) Analog Frequency Response (±3dB at 20Hz and ±1dB at 20000Hz) Efficiency (Measured at 1W/Ch) Microphone/Line Inputs Full-scale Input Voltage (with 20dB Boost) Full-scale Input Voltage (with Boost Off) Dynamic Range (Measured with –60dBFS Signal Present) THD+n Channel Crosstalk (Measured at 1kHz and 0dB Gain) Analog Frequency Response (±3dB at 20Hz and ±1dB at 20000Hz) Input Resistance 0dB 10dB to 40dB Input Capacitance Minimum Typical Maximum Units 20 1 100 –85 –84 - 20000 Vrms dBFS dB dBFS Hz 20 1.2 99 –87 –75 - 20000 Vrms dBFS dB dBFS Hz 3.96 2.83 20 - 4 2.90 94 –71 85 4.2 3 20000 - Vp Vrms dBFS dBFS Hz % 0.1 1 200 - - - Vrms 91 –87 –84 20000 - dBFS dBFS dBFS Hz k pF 15.8 5 5 Ordering Information Ordering Part Number Part Number Description Package CX20642-11Z CX20652-11Z CX20642 CX20652 0°C to 70°C 5.1 HD Audio CODEC 0°C to 70°C 5.1 HD Audio CODEC 48-QFN 48-QFN Supported Functions Integrated Mono Number of DACs/ Class-D Amplifier ADCs Y 6/6 6/6 N www.conexant.com Headquarters: 1901 Main Street, Suite 300 Irvine, CA,92614 General Information: U.S. and Canada: 888-855-4562 | International: 1 + 949-483-3000 © 2014 Conexant Systems, Inc. All rights reserved. 019-4252PBR00