AKU2002C CMOS MEMS Digital Microphone - Akustica - #1

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AKU2002C PRODUCT BRIEF PB9-1.0 Chips That Can Hear, Speak, and Sense the World Around Them Key Features High performance, omni-directional digital-output microphone Monolithic CMOS MEMS microphone chip 3.76 mm x 4.72mm x 1.75mm package size Industry standard digital microphone output compatible with CODECs for many applications 1.8V – 3.6V operating voltage 56 dB SNR Better than -55dB power supply rejection (PSR) Ultra-low power sleep mode Supports clock frequencies from 1-4MHz Applications Mobile computers designed to support high quality voice applications and where a high degree of EM/RF immunity is required Microphone Arrays utilizing noise cancellation and beam steering applications Other small, thin consumer electronic devices using more than one microphone Akustica, Inc. 2835 East Carson Street, Suite 301 Pittsburgh, PA 15203 USA ph: (412) 390-1730 fx: (412) 390-1737 www.akustica.com sales: sales@akustica.com PRODUCT BRIEF AKU2002C CMOS MEMS Digital Microphone GENERAL DESCRIPTION The AKU2002C is a top ported, surface mountable, digital output microphone which can be used in any design that currently uses a 3.76mm x 4.72mm digital microphone footprint. Akustica’s digital microphones are the world’s first and only surface-mountable monolithic digital microphone chips that integrate an acoustic transducer, pre-amplifier, and sigma-delta modulator in a single chip. The robust single-bit digital output stream from the AKU2002C is virtually immune to all forms of Radio Frequency Interference (RFI) and Electromagnetic Interference (EMI) allowing the microphone to be placed anywhere regardless of proximity to displays, WiFi antennae, or other sources of interference that would degrade or preclude use of conventional microphones. For the manufacturer, this translates to the highest degree of design flexibility and freedom, and faster time-to-market. With a user selectable L/R channel option, The AKU2002C is ideal for use in multiple microphone applications such as microphone arrays mounted on embedded camera modules in laptop PCs and PC peripherals, as well as dual microphone wireless headsets and mobile phone applications. Mono or stereo AKU2002C digital microphones will interface directly to most HD Audio CODECs used today in laptop and desktop PCs , as well as CODECs for mobile phones and other consumer electronic devices. For a complete list of CODECs that have been certified for use with the AKU2002C, please contact Akustica directly. To evaluate stereo digital output microphones, Akustica has developed a microphone array module, the AKU2xxx-Module-B. This module can interface to any CODEC which accepts the standard digital microphone interface (PDM). BENEFITS OF THE AKU2002C FUNCTIONAL BLOCK DIAGRAM RF and EM immunity for design flexibility PDM (Pulse Density Modulated) single-bit output supports dual-microphone, single-wire multiplexing Small form factor enables placement in thin profile areas and very small products Integrated PSR (Power Supply Rejection) eliminates the need for a regulated power supply to the microphone Power-down mode reduces current consumption when microphones not in use Highly matched in frequency and phase response RoHS comliant, lead-free surface-mountable, and automated pick and place compatible MIC SUPPORT CIRCUITRY PREAMP CHARGE PUMP MIC VDD DATA OUT GND MIC BIAS SUPPORT CIRCUITRY L/R SELECT CLOCK IN – Modulator Covered by one or more of U.S. Patents: 5,717,631; 5,970,315; 7,215,527; 7,019,955; 6,829,131; 7,089,069; 7,026,184; 7,202,101; 7,049,051; 6,943,448; and 6,936,524