AKU1126 Analog Microphone - Akustica - #1

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AKU1126 PRODUCT BRIEF PB8-1.1 Chips That Can Hear, Speak, and Sense the World Around Them Key Features Tiny footprint of only 4mm2 High performance, omni-directional analog-output microphone Monolithic CMOS MEMS microphone chip 57 dB SNR -33 to -45 dBV sensitivity 1.65V-3.6V operation 140 ìA current consumption <5% distortion at 115dB SPL Better than 45dB power supply rejection ratio (PSRR) Highly matched microphones in frequency and phase response Applications Small, thin-profile cell phones and other portable devices Wireless headsets and other space-constrained audio accessories Portable consumer electronic devices which use 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 AKU1126 Analog Microphone With Selectable Gain GENERAL DESCRIPTION The AKU1126 is the world’s smallest, analog-output microphone that uses standard CMOS semiconductor packaging technology and materials and has user selectable gain from 0 to 12dB. While other microphones degrade in performance as they shrink in size, the AKU1126 maintains superior performance in an ultra-small, 2mm x 2mm form factor. The AKU1126 is the first microphone product to leverage Akustica’s 1mm x 1mm CMOS MEMS microphone die – a monolithic solution which integrates the acoustic transducer and accompanying electronics in a single chip of silicon. In contrast to other silicon microphones, Akustica’s one die approach eliminates the need for inter-die wirebonds, allowing for smaller, higher performance, more reliable products. AKU1126 microphones are simple to integrate into many consumer electronic devices with just minimal design changes. In addition, two or more AKU1126 microphones can be used without increasing the PCB footprint dedicated to a single microphone used today. This makes the AKU1126 ideal for use in very small end-user devices such as mobile phones and headsets where board space is at a premium and a high degree of voice quality can be achieved using microphone arrays and next generation noise suppression technology. Additionally, up to 12dB of gain can be added to the AKU1126 microphone sensitivity by using just one external resistor. The gain select feature provides a new level of flexbility as it allows the same microphone to be used for both near and far-field applications. For higher gain applications, applying the gain directly at the microphone, instead of in downstream electronics, will provide the solution with the lowest overall system noise. BENEFITS OF THE AKU1126 FUNCTIONAL BLOCK DIAGRAM Miniature 2mm x 2mm x 1.25mm package size Up to 12dB of selectable gain As much as 75% smaller than the footprint of alternative microphones 70% lower current consumption than traditional electret microphones 50% better THD performance at 115dB SPL than other microphones Lead-free surface-mountable for improved manufacturing reliability and efficiency Automated pick and place compatible RoHS compliant and halogen free P R E AMP CHAR GE PUMP MIC S UPPOR T CIR CUITR Y PREAMP CHARGE VDD OUT GND MIC BIAS SUPPORT CIRCUITRY GAIN SELECT AKU1126 CMOS MEMS 1mm x 1mm Microphone Die 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.