Features System Operates from 2.7-3.6 V host-powered, down to 1 V when battery operated Low current consumption: 5 ma audio equalizer + feedback ANC I 2 C interface for production and dynamic in-use configuration Highly efficient headphone amplifier delivering up to 30 mw (32 ohm) Compact LFBGA-64 4.5 mm x 4.5 mm x 1.4 mm Highly integrated design with low external part count Low-cost solution simple to design-in and manufacture RoHS compliant and halogen-free Operating temperature -20 to +85 C Audio processing LFBGA-64 (4.5 x 4.5 x 1.4 mm) HD-PA Soundcore TM R3 from Soundchip SA Stereo audio playback with 100 db of dynamic range Feedback (FB) and feed-forward (FF) active noise cancellation (ANC) Note: Stereo HD-PA digitally programmable active noise cancelling audio engine Data brief Digitally programmable ANC processing Up to 30 db ANC performance over wide frequency band Digitally programmable audio equalization (EQ) Digitally controlled binaural monitoring, volume control, audio mute Software supported in-production programming and calibration Comprehensive click and pop-noise suppression Best-in-class electrical noise floor at less than 10 µvrms Onboard One Time Programmable (OTP) memory for device settings for storing device configuration LED driver for illumination and low-battery indication Optional automatic shutdown at low voltage Input and output Single-ended or balanced analog audio and microphone inputs Supports ECM and MEMS microphones 64-step digitally controlled microphone gains Built-in capacitor-less headphone amplifier supporting balanced-armature and dynamic receivers Digital volume control with 32-steps including mute Direct interface for Bluetooth, USB, audio codec output Connect optional external circuitry to support additional sound processing HD-PA and Soundchip are registered trademarks of Soundchip SA. The enablement and use of this device requires licensing and device programming equipment from Soundchip SA. Unauthorized use is not permitted. All rights reserved. March 2013 DocID024342 Rev 1 1/7 For further information contact your local STMicroelectronics sales office. www.st.com 7
Contents STANC0 Contents 1 Description................................................. 3 2 Block diagram.............................................. 4 3 How to engage with us....................................... 5 4 Revision history............................................ 6 2/7 DocID024342 Rev 1
Description 1 Description STANC0 is an HD-PA digitally programmable active noise cancelling (ANC) audio engine for stereo headset applications. Patented Soundcore R3 audio electronics licensed from Soundchip enables STANC0 to deliver high-quality environmentally-resilient sound performance with a wide selection of acoustics, comprising either dynamic, MEMS or balanced-armature type transducers. STANC0 features integrated low-noise, high-efficiency stereo headphone amplifiers capable of capacitor-less direct-drive output configuration that can deliver 30 mw into a 32 ohm load. It contains four independently controlled microphone preamplifiers, digital gain control and programmable low-latency ANC filters and audio equalizers. The onboard digitally controlled filters can be used to implement feedback ANC (FB-ANC) by processing input from microphones positioned close to the ear. Optional external application-specific filters may also be configured to implement feed-forward ANC (FF-ANC) by processing input from microphones positioned on the outside of the headset. FB-ANC and FF-ANC can operate independently or they can be used in combination to provide market-leading hybrid ANC (H-ANC). STANC0 integrates circuitry for digitally programmable volume control, audio mute, binaural monitoring, as well as low battery level detection/indication and illumination. System presets and filter parameters may be stored in One Time Programmable (OTP) memory and modified in operation through either the Hardware Mode or I 2 C Mode. STANC0 can operate from 1.0 to 1.7 V (battery powered) and 2.7-3.6 V (host powered). Proprietary circuitry suppresses audible clicks and pops during mode and volume changes, startup and shutdown, while substantial power supply filtering provides robust immunity to system noise. STANC0 is supplied in a compact LFBGA-64 package to Soundchip HD-PA licensees, and is supported by an extensive set of resources including application notes and reference designs. STANC0 is programmed by Soundchip Soundstation computer-aided design and production tools. Target applications for STANC0 include high-performance stereo headphones/headsets and smart audio accessories for portable music, mobile telephony, personal computing and commercial aviation. DocID024342 Rev 1 3/7
Block diagram STANC0 2 Block diagram Figure 1. STANC0 block diagram 4/7 DocID024342 Rev 1
How to engage with us 3 How to engage with us A three-party NDA is necessary to gain full access to: Datasheet and application notes Case study reports Pricing An approved ST-Soundchip NDA template is available on request Conversion of existing customer headphones is possible to demonstrate the performance advantages of our solution. Our business model is a combination of component purchase and technology licensing. In order to engage with us, please, contact: eur.audio@st.com info@soundchip.ch DocID024342 Rev 1 5/7
Revision history STANC0 4 Revision history Table 1. Document revision history Date Revision Changes 05-Mar-2013 1 Initial release. 6/7 DocID024342 Rev 1
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