原标题：基于Qualcomm WHS9420的USB Type-C主动降噪ANC耳机方案

　　WHS9420是Qualcomm的新一代Hi-Fi audio code编解码USB Type-C接口的立体声芯片，并且具有比较前沿的ANC主动降噪功能，相比比传统的USB Type-C都是需要增加外围的ANC电路，WHS9420整体成本就会更低，外部电路设计也会更简单。除此外，芯片本身的强大性能可以支持多信道录音达到24bit/192Khz,支持32bit/384Khz的高品音质音乐。不管你身在何种嘈杂复杂的环境，都可以通过强大的ANC功能消除噪声畅通无阻的通话和尽情享受高品质的音乐。

　　场景应用图

　　产品实体图

　　展示板照片

　　方案方块图

　　核心技术优势

　　1. ANC主动降噪，通话更轻松;

　　2. Hi-Fi 无损音乐，更能享受高品质的音乐;

　　3. USB Type-C连接手机，手机玩游戏，屏蔽外界噪声，吃鸡王者随心所欲;

　　方案规格

　　1. 32bit/384Khz PCM;

　　2. DSD64/DSD128音频格式;

　　3. ANC (FF/FB/MBHC降噪方式), 12bit width;

　　4. latency less than 10us;

　　5. up to 4KHZ bandwidth;

　　技术文档

　　【WHS9420】

　　WHS9420 with integrated ANC is engineered to support very high quality audio over the USB connection with up to 192kHz/24-bit audio support and very high quality DAC output. WHS9420 is a single chip USB audio SoC platforms designed specifically for USB-C connected audio devices including headphones, speakers and dongles.

　　WHS9420 is a product of Qualcomm Technologies, Inc. and/or its subsidiaries.

　　Specifications

　　USB

　　USB Version: USB-C

　　General Audio

　　Signal-To-Noise Ratio: 123dB

　　Input Sample Rate: Up to 192kHz

　　Audio Playback

　　Total Harmonic Distortion + Noise (THD+N), Playback: -105dB

　　Input/Output

　　DAC: 1 DAC

　　Package

　　Package Type: 3.2 x 3.2 mm, CSP

　　Series of single-chip USB audio SoCsdesigned for USB-C connected audio devices including headphones, headsets and dongles.

　　As smartphone manufacturers move toward slimmer, monolithic handset designs and start to remove the 3.5mm headphone jack, the USB-C connectors offer an excellent option for those who want to continue to use wired headsets and speakers.

　　The WHS94xx series offers three SoC options which are designed to address the premium, mid and entry-level tiers of this emerging market.

　　z WHS9410 is an entry level solution designed to bring quality audio performance to lower tier headsets or dongles with up to 96kHz/24-bit audio support over the USB connection.

　　z WHS9415 is designed for mid-tier USB-C headsets and USB-C to 3.5mm jack dongles, with up to 384kHz/32-bit audio support over the USB connection and very high-quality DAC output.

　　z WHS9420 adds Active Noise Cancellation (ANC) support for a superior quality digital audio consumer experience over USB-C, with up to 384kHz/32-bit audio support over the USB connection and very high-quality DAC output.

　　Features

　　z Specifically designed for digital audio on USB and USB type-C peripherals – headsets and dongles

　　z Designed to bring superior audio performance to the USB audio segment

　　z Integrated USB-C PHY up to UAC3

　　z Designed for extremely low power and

　　ultra-small form factor designs

　　z Embedded ROM and external optional Flash

　　z Hi-Fi Audio quality performance and low power audio:

　　z Data rate/bitrate to 384KHz/32bit (WHS9420)

　　z 2-DACs up to 127dBA/-110dB THD+N (class H headphone driver)

　　z 3-ADCs up to 110dBA/-100dB THD+N (1 for voice, 2 for ANC on WHS9420)

　　z Supports digital ANC (Feedforward, Feedback) with WHS9420

　　z Support for multi-button headset control

　　z Supports innovative use cases such as binaural recording

　　z USB-C “burst mode” (LPM) supports significant power consumption savings

　　z 3.22mm x 3.22mm WLCSP

　　Product Part Number

　　WHS9410 SoC WHS-9410-0-60BWLNSP-TR-02-0

　　WHS9415 SoC WHS-9415-0-60BWLNSP-TR-02-0

　　WHS9420 SoC WHS-9420-0-60BWLNSP-TR-02-0

　　WHS9410 Dev Board 65-PF991-200

　　WHS9415 Dev Board 65-PF991-215

　　WHS9420 DB (FF or FB ANC) 65-PF991-201

　　WHS9420 DB (Hybrid ANC) 65-PF991-202