HD voice capture IC offers high dynamic range
The CX20810 high-definition voice capture IC targets voice interactive products, voice conferencing systems, Skype TV/STB webcam, and surveillance. It is offered as the first high-performance audio A/D converter with pre-amp, which maximizes the SNR of a microphone’s input path with a constant, low gain across a long range (up to 5m). The IC also provides a high dynamic range of 106 dB.
Traditional microphone ADCs with limited dynamic range require dynamic adjustment of the PGA gain to avoid either saturation of the speech signal, or degradation of its SNR due to the high ADC self-noise floor.
The part also features internal bi-quad for noise filtering and mic array matching, low power standby of 5 µA, 122 dBV input referred noise. Also available is an optional 1 W at 4 Ω Class D amplifier/Digital PWM output on CX20811 and CX20813. (From $0.90 ea/10,000; evaluation kits, $199 — available now)
By Christina Nickolas
Conexant Systems , Newport Beach , CA
Sales 888-855-4562
www.conexant.com
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