AKU1126 Analog Microphone0 pages

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.