CX20665 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 CX20665 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. 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’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, as well as multiple re-taskable ports, including microphone/line-in, microphone/line-in/line-out, and line-in/line-out retasking. Conexant also supports microphone/line in/ headphone re-tasking. All output ports feature PopShield technology to eliminate pops and clicks. The CX20665 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 POS systems Conexant Confidential • www.conexant.com • 019-65PBR00 • • • • • • • • • • • • • • • • • • • • • Two 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 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 CX20665 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 Minimum Typical Maximum Units Line Outputs Full-scale Output Voltage - 1 - Vrms Dynamic Range (Measured with –60dBFS Signal Present) - 100 - dBFS THD+n - –85 - dB Channel Crosstalk - –84 - dBFS Analog Frequency Response (±3dB at 20Hz and ±1dB at 20000Hz) 20 - 20000 Hz Headphone Output Full-scale Output Voltage - 1.2 - Vrms Dynamic Range (Measured with –60dBFS Signal Present) - 99 - dBFS THD+n - –87 - dB Channel Crosstalk - –75 - dBFS Analog Frequency Response (±3dB at 20Hz and ±1dB at 20000Hz) 20 - 20000 Hz Full Scale Output Voltage (into 4) 3.96 2.83 4 2.90 4.2 3 Vp Vrms dBFS Class-D Speaker Amplifier Outputs Dynamic Range (Measured with –60dBFS Signal Present) - 94 - THD+n (Measured at –3dBFS) - –71 - dBFS Analog Frequency Response (±3dB at 20Hz and ±1dB at 20000Hz) 20 - 20000 Hz Efficiency (Measured at 1W/Ch) - 85 - % Full-scale Input Voltage (with 20dB Boost) Full-scale Input Voltage (with Boost Off) 0.1 1 - - Vrms dBFS Microphone/Line Inputs Dynamic Range (Measured with –60dBFS Signal Present) - 91 - THD+n - –87 - dBFS Channel Crosstalk (Measured at 1kHz and 0dB Gain) - –84 - dBFS Analog Frequency Response (±3dB at 20Hz and ±1dB at 20000Hz) 200 20000 Hz Input Resistance 0dB 10dB to 40dB - 15.8 5 - k - Input Capacitance - 5 - pF Ordering Information Supported Functions Ordering Part Number Part Number Description Package Integrated Mono Class-D Amplifier Number of DACs/ ADCs CX20665-11Z CX20665 0°C to 70°C HD Audio CODEC 48-QFN Y 4/6 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. 019-65PBR00