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Analog switch pumps up audio quality

Posted: 03 Oct 2008 ?? ?Print Version ?Bookmark and Share

Keywords:analog switch? audio? SPDT low voltage?


austriamicrosystems has expanded its analog switch portfolio with the AS1747, a dual single-pole/double-throw (SPDT) low-voltage analog signal switch. The switch, which is the first within a family of switches with negative signal capability, allows designs without AC coupling capacitance in audio applications, says austriamicrosystems.

The AS1747 combines the extremely low on-resistance of 0.4 ? with channel-to-channel matching of less then 0.03?, reducing the amount of signal deviations between channels to a minimum. Additionally, the AS1747 shows a remarkable on-resistance flatness of 0.25?. Altogether this improves total harmonic distortion (THD+N) to jutting 0.01 percent and yields an excellent audio signal quality, says austriamicrosystems.

The AS1747 can handle negative signals with a single positive 1.8V to 5.5V power supply and is available in a 10-pin TDFN(3mm x 3mm) package suitable for operating environments ranging from -40C to +85 C.

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