AKU2xxx-Module-B Stereo Digital Microphone0 pages

AKU2xxx-Module-B PRODUCT BRIEF PB7-1.0
Chips That Can Hear, Speak, and Sense the World Around Them
GENERAL DESCRIPTION
The AKU2xxx-Module-B is a daughter card that provides stereo digital microphone output for
direct connection to the TI AIC33/34/3106 evaluation board using the accompanying harness and
connector. The microphone spacing on the module assembly is 67.5mm. This assembly will allow
an easy assessment of the functionality of stereo digital microphones with the TI family of CODECs
that are configured to accept stereo digital microphone input.
Along with the two AKU2xxx digital microphones that are mounted on the daughter card, there are
also two 0.1ìF decoupling capacitors on the board near the microphones. Note that the necessity of
these components or others in an a system will be highly dependent on the exact implementation
and length of cable selected.
Features and Benefits
AKU2xxx digital microphones are small
enough to allow multiple microphones to fit in
a small space
AKU2xxx digital microphones are solder
reflow and pick and place compatible
AKU2xxx digital microphones are virtually
immune to RF and EM sources
Reduces design time
Enables modular acoustic design that can
be used across platforms
High PSR eliminates power supply noise
Power regulation circuitry may not be
needed
Stereo digital microphones can be used as a
microphone array to suppress ambient noise,
improve echo cancellation, and increase
speech recognition accuracy in mobile
platforms
Applications
Mobile platforms that are RF and EM rich
environments that are designed to support
high quality voice input for telephony or
speech recognition
Microphone arrays which use noise
suppression and/or echo cancellation
software
Stereo microphones
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
ÓÄ
Modulator
1
2 5
3
Left Select
(LOW)
Right Select
(HIGH)
Data
ADC
Digital Mic
Enable Switch
Decimation
Filter
GPI02 GPI01 IOVDD DGND
ADC Channel
TLV320AIC33/TLV320AIC3106/TLV320AIC34
AKU2xxx
AKU2xxx
PGA
Clock
Data
Clock
VDD GND
4
Output
Amp
ÓÄ
Modulator
1
2 5
3
4
MEMS
Mic
Output
Amp
MEMS
Mic
I2S Bus
Digital Stereo Microphone Implementation
PRODUCT BRIEF
AKU2xxx-Module-B
Stereo Digital Microphone
Daughter Card
AKU2103 Digital Output Microphone
AKU2xxx-Module-B Daughter Card
Stereo digital microphone reference design block diagram