Product Brief
Akustica 2nd Gen. HD Voice MEMS Microphones
Analog:
Digital:
AKU143 – AKU344 – AKU345 – AKU346
AKU241 – AKU242 – AKU441 – AKU442
www.akustica.com
Akustica’s new HD voice MEMS microphones

Manufactured by Bosch, the world’s leader in

MEMS technology
Up to 65dB SNR, super-wideband frequency
nd
Gen. HD Voice Family
nd
Gen. HD Voice Family
Analog 2
response (50Hz-14kHz), and tightly matched
sensitivity of just ±1dB

Analog and digital versions to offer design
flexibility

Top and bottom port form factors with industry
standard footprints, all with matched performance,

to offer an easy upgrade path to HD Voice.
Line-up also include industry smallest footprint,
highest SNR combination (AKU346) for wearables
and space constrained applications
Analog:


Top Port: AKU143
Bottom Port: AKU344, AKU345, AKU346
Digital 2
Digital:


Top Port: AKU241, AKU242
Bottom Port: AKU441, AKU442
Akustica, part of the Bosch Group of companies, is now
offering a 2
nd
generation of HD Voice analog and digital
top- and bottom-port microphones. All HD voice
microphones feature high or very high SNR, flat
frequency response, and uniform sensitivity, supporting
the market trend to utilize high-performance audio
components along with noise-processing algorithms to
deliver HD voice quality in mobile devices.
Akustica’s
new
microphones
are
also
drop-in
replacements for today’s most commonly used MEMS
microphones, providing a straightforward path for
manufacturers to upgrade current designs to meet
market demand for more natural-sounding conversation
and improved speech recognition accuracy. They also
offer a higher degree of RF immunity making them
suitable for a variety of application including mobile
phones.
Data subject to change without notice | © Akustica, Inc. 2014 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in
the event of applications for industrial property rights. | November 2014
2 | 2nd HD Voice MEMS Microphones | Product Brief
Gen 2: Analog Microphone Specifications
PB22-1.0
Target Applications
Part Names
AKU143, 344, 345, 346
Smartphones and mobile phones
Operating voltage
1.6V to 3.6V
PC, laptops and tablets
Directivity
Omni-directional
Small wearable accessories (headsets, smart
SNR
65dB
watches and glasses)
64dB (AKU346)
Digital still/video cameras
60dB
Portable media players
Power Supply
Gaming consoles / controllers
Rejection Ratio
Sensitivity
-42dBV/Pa
Voice activated entertainments systems and
Sensitivity Tolerance
±1dB
remote controllers
Flat Frequency
50Hz to 14kHz
Microphone arrays – multi-mic applications
Smart-home sensor hubs / clusters, and IoTS
Response
Current Consumption
155µA
Port Location
Top (AKU143)
acoustic sensor nodes
About Akustica – Bosch Group
Bottom (AKU344, 345, 346)
Package Dimensions
AKU143
2.95x3.76x1.10mm
3
AKU344
2.50x3.35x1.00mm
3
AKU345
2.95x3.76x1.00mm
3
AKU346
2.00x3.00x0.93mm
3
Pb-free and RoHS2 compliant
Halogen Free in accordance with IEC61249-2-21
Gen 2: Digital Microphone Specifications
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.
Part Names
AKU241, 242, 441, 442
Operating voltage
1.62V to 3.6V
Bosch has been active in the field of MEMS since 1988
Directivity
Omni-directional
SNR
63dB
and is one of the pioneers in microsystem-technology.
Bosch serves both the automotive and consumer
Power Supply
-73dBFS
electronics markets, and is the only MEMS supplier to
design and manufacture all of its own MEMS for its
Sensitivity
-26dBFS
Sensitivity Tolerance
±1dB (AKU241, 441)
complete portfolio of inertial, pressure, magnetic, and
acoustic MEMS sensors for consumer devices. With
Rejection
±1.5dB (AKU242, 442)
Flat Frequency
50Hz to 14kHz
more than four billion MEMS sensors shipped
worldwide since 1993, Bosch is the world’s leading
supplier of MEMS sensors.
Response
Current Consumption
clock off
5µA
clock on
800µA
865 µA (AKU241)
Port Location
Top (AKU241, 242)
Bottom (AKU441, 442)
Package Dimensions
4.00x3.00x1.00mm
3
Pb-free and RoHS2 compliant
Halogen Free in accordance with IEC61249-2-21
Please contact Akustica for more information.
Akustica, Inc.
2835 East Carson Street, Suite 301
Pittsburgh, PA 15203 USA
[email protected]
ph: (412) 390-1730
www.akustica.com
Data subject to change without notice | © Akustica, Inc. 2014 All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the
event of applications for industrial property rights. | November 2014