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Audio quality in handsets cleaner with low resistance switch

The ADG849 guarantees less than 1 ohm resistance at 5 V in SC70 package for lower audio distortion in multimedia switching applications.

Analog Devices' new high-performance analog switch is designed to improve audio quality in today's popular handset and multimedia portable designs that require higher voltage supplies to support media-rich features, such as musical ringing tones and color screens. The new part–the ADG849BKS–joins ADI's ADG8XX family of <1 ohm Ron (on resistance) switches and multiplexers.

The ADG849 is the industry's first SPDT (single-pole,
double-throw) switch in an SC70 package to feature <1 ohm resistance at 5.5 V-supply. The ADG849 minimizes distortion on audio signals up to 5.5 V, making it an ideal solution for new handset designs that require higher voltage supplies to support polyphonic (musical) ringing tones, and other multimedia features, such as color screens and graphics. The switch reduces Ron (on resistance) to <1 ohm, with total harmonic distortion of 0.02 percent at 25 degrees C. It has a wide operating range of +1.8 V to 5.5 V, providing significant performance advantages over other switching solutions in SC70 packaging.

The ADG849 is ideally suited for space-constrained applications that require minimal distortion through the switch, including cell phones, PDAs, battery-powered systems, audio and video signal routing, modems, PCMCIA cards, hard drives and relay replacement.

The ADG849 is housed in a 6-lead SC70 package. Pricing per unit in 1,000-piece quantities is $0.94. Samples are available now, with full production scheduled for Spring 2004. For more information, please visit www.analog.com/ADG849. Tel: 1/800-ANALOGD (1/800-262-5643)

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