Data subject to change without notice | © Akustica, Inc. 2015. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as
in the event of applications for industrial property rights. February 2015
General Description
AKU350 is an HD Voice quality, bottom port, analog
output MEMS semiconductor microphone. It is a
microphone consisting of a MEMS acoustic sensor,
and an integrated circuit (IC) with a pre-amplifier,
charge pump, and supporting circuitry in an industry
standard package footprint of 2.65mm x 3.50mm x
0.98mm.
Designed specifically to provide ultra high acoustic
performance in a small footprint package for mobile
handsets, set-up-boxes, TV remote controllers, smart
homes, and other applications requiring excellent
acoustic performance for speech recognition and far
field applications. AKU350 offers 67dB signal-to-noise
ratio (SNR) and uniform sensitivity matching of just +/-
1dB between microphones. It also offers a flat
wideband frequency response delivering uniform audio
capture across a broad audio spectrum.
AKU350 metal lid package is immune to RF and
Electromagnetic (EM) interferences, allowing for easy
integration into wireless devices.
Key Features
Bottom port, Analog single-ended output
Omni-directional silicon microphone
Ultra high performance: 67dB SNR
Uniform sensitivity tolerance: -38dB ± 1dB
Flat frequency response for super-wideband audio
Package immune to RF/EM interference
Lead-free, surface-mountable and RoHS2
compliant
Halogen-free in accordance with IEC61249-2-21
Thin profile, SMT packaging
Industry-standard, small form factor package of:
2.65x3.50x0.98mm3
Target Applications
Smartphones and mobile phones requiring high
quality acoustic performance microphon
Voice activated entertainments systems, set-up-
boxes, and remote controllers
Smart-home sensor hubs / clusters, and IoT
acoustic sensor nodes
Wearable accessories requiring small footprint and
high performance
Digital still/video cameras
IC / digital voice recorders
Gaming consoles / controllers
Microphone arrays – multi-mic applications
Functional Block Diagram
Product Brief
AKU350
Analog Silicon MEMS Microphone
www.akustica.com
2 | AKU350 | Product Brief PB29-0.75
Data subject to change without notice | © Akustica, Inc. 2015 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in
the event of applications for industrial property rights. | February 2015
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Output (dB re: 1kHz @ 94 dBSPL)
Frequency (Hz)
Friendship
Akustica Advantages
Multiple MEMS Technologies: Akustica has two
completely different MEMS technologies to chose from,
uniquely positioning Akustica as a development partner
for next generation products that meet the diverse size
and performance requirements of consumer
electronics device manufacturers.
In-house Design and Manufacturing: Unlike other
MEMS microphone manufacturers who buy their
MEMS and/or ASIC die from a third party, Akustica
maintains complete product knowledge by designing
100% of our MEMS microphones in-house. In addition,
Akustica is the only MEMS microphone supplier to
offer the security of in-house MEMS manufacturing via
Bosch’s world-renowned wafer fab in Reutlingen,
Germany.
Applications Expertise: The performance of modern
microphone systems is heavily dependent on the
overall platform design, including software algorithms,
mechanical layout and hardware implementation. As
an innovator in the field of MEMS microphones and
leveraging over 10 years of experience, Akustica has a
deep understanding of acoustic design requirements
and proper analysis methods. To ensure our
customers a seamless integration experience and
support constrained design cycles, Akustica offers
acoustic design and modelling services prior to
assembly. Akustica also provides production test
services, training, and test equipment to help ensure
the quality of both incoming and final assembled
products.
About Akustica – Bosch Group
Akustica was founded in 2001 to develop and market a
complete portfolio of digital and analog microphones
using the unique and patented CMOS MEMS
technology developed at Carnegie Mellon University.
In 2009, Akustica was acquired by, and is now a wholly
owned subsidiary of, Robert Bosch North America. As
part of the Bosch Group, Akustica joins a family of
companies with combined annual sales of more than
$70 billion and a footprint of over 300,000 associates
worldwide.
Bosch has been active in the field of MEMS since 1988
and is one of the pioneers in microsystem-technology.
Bosch serves both the automotive and consumer
electronics markets, and is the only MEMS supplier to
design and manufacture all of its own MEMS for its
complete portfolio of inertial, pressure, magnetic, and
acoustic MEMS sensors for consumer devices. With
more than five billion MEMS sensors shipped
worldwide since 1993, Bosch is the world’s leading
supplier of MEMS sensors.
Please contact Akustica for further information.
Technical Specifications
Operating voltage
1.62V to 3.6V
Directivity
Omnidirectional
SNR
67dB
Sensitivity
-38dBV/Pa ± 1dBV
Flat Frequency
Response (± 5dB)
50Hz to 14kHz
Power Supply
Rejection
63dB
Current Consumption
205µA
Port Location
Bottom
Package Dimensions
2.65x3.50x0.98mm3
Ordering Information
Part Number
AKU350
Description
Analog MEMS Microphone
Package
5 Pad LGA
Shipping Method
13” Reel
Standard Quantity
5900
Akustica, Inc.
2835 East Carson Street, Suite 301
Pittsburgh, PA 15203 USA
sales@akustica.com
ph: (412) 390-1730 fx: (412) 390-1737
www.akustica.com
Typical Frequency Response
