Pittsburg, Pa. Akustica says it has introduced the industry's first High Definition (HD) microphone that enables HD voice quality in laptop PCs and other broadband mobile devices. The AKU2103 digital-output microphone delivers a guaranteed wideband frequency response and compliance with the TIA-920 audio performance requirement for wideband transmission in applications such as Voice-over-Internet Protocol (VoIP).
The AKU2103 HD microphone is a surface-mountable, monolithic silicon microphone in a 4 x 4-mm undermount package. The company says it's the first undermount digital microphone to provide a L/R-user select function that allows a single device to be configured as either a left or a right microphone. The Pulse Density Modulated (PDM) digital output of two AKU2103 microphones can also be multiplexed onto a single data wire, reducing the number of cables required for signal routing.
This industry-standard stereo output is supported by multiple HD Audio and universal serial bus (USB) Audio CODECs. The device offers a power supply rejection (PSR) of better than -70 dB and a low-power sleep mode current consumption of <20 microamps.
Like other Akustica microphones, the AKU2103 is a tiny CMOS microelectromechanical systems (MEMS) device with a mechanical transducer, output amplifier and sigma-delta converter all integrated on a single silicon chip. The single-chip construction coupled with the robust digital output and a higher level of PSR make the output signal of the AKU2103 virtually immune to radio frequency (RF)/electromagnetic (EM) interference as well as to power supply modulation, said Akustica. The result is a clear, realistic sounding, "static"-free voice input signal which does not degrade through the signal path (which can be as long as several feet) from the microphone to the CODEC, said the company.
Availability: The AKU2103 will begin sampling in third quarter 2007.
Product information: digital microphones and AKU2103 product brief
Akustica, 1-412-390-1730, www.akustica.com