This page contains all the information about
the Dell Chromebook 11
(3189) integrated microphone.
Akustica AKU240 is an HD Voice quality, top port,
digital output MEMS microphone in a small 4.0 x 3.0 x 1.0 mm package.
The robust digital output stream from the AKU240 is virtually immune
to all forms of Radio Frequency Interference (RFI) and Electromagnetic
Interference (EMI) allowing the microphone to be integrated anywhere
on the platform regardless of proximity to displays, the Wi-Fi antennae,
or other sources of interference that would degrade the signal of
conventional analog microphones. For the device manufacturer, this
translates to a higher degree of design flexibility by providing a
consistent SNR level regardless of environment, resulting in shorter
design cycles.
The output of the microphone is pulse density modulated
(PDM), a single-bit digital output stream designed to enable the multiplexing
of stereo microphone data onto a single wire. With a user selectable
Left/Right channel option, the AKU240 is ideal for use in multiple
microphone applications.
Key features
Digital MEMS Microphone with PDM (pulse density modulation)
output
Excellent acoustic performance with 63 dB SNR
Compatible with Microsoft Windows 8 and Intel Ultrabook
Requirements for Digital Microphones
Tightly controlled sensitivity of -26 dBFS +/- 2 dB
Robust digital-output immune to RF/EM interference
Matched microphones in frequency and phase response
for array applications
Output supports dual-microphone, single-wire multiplexing
•Industry standard microphone interface compatible with multiple codecs.
Low current power-down mode
Lead-free surface-mountable and RoHS2 compliant
Halogen-free in accordance with IEC61249-2-21
Thin profile, SMT packaging
Industry-standard package of 4.00 x 3.00 x 1.00 mm
Typical applications
Ultrabooks
Mobile phones
Media tablets
eReaders
Microphone arrays
Webcams and camera modules
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