TI’s new stereo codecs offer digital microphone support for portable consumer devices

November 8, 2007 — Texas Instruments Inc. (TI) has introduced three new audio codecs featuring low power consumption and noise filtering capabilities to maximize battery life and enhance performance in portable consumer applications such as wireless handsets. According to TI, these are the industry’s first I2S codecs capable of interfacing directly to digital or analog microphones.

The four-channel TLV320AIC34, and TLV320AIC33 and TLV320AIC3106 stereo codecs can accept either a digital bit stream from a digital microphone or differential or single-ended inputs from a traditional analog microphone. In conjunction with digital microphones such as those offered by Akustica, which announced on November 2 that it has shipped its two-millionth CMOS MEMS digital microphone (just three months after its one-millionth microphone), the new codecs provide designers with a premium quality audio solution.

“Electromagnetic and radio frequency interference can compromise audio quality on portable devices and cellular phones, resulting in ‘static-noise’ and ‘drop-outs’ in voice conversations,” said Davin Yuknis, vice president marketing and product management, Akustica. “The combination of TI’s advanced, high-performance codecs and Akustica’s robust, digital microphones ensures that the audio quality is crystal clear throughout the acoustic signal chain.”

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