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Switches promise fast interface for ultrasound imaging apps

Posted: 01 Aug 2008 ?? ?Print Version ?Bookmark and Share

Keywords:SPST switch? serial interface? high-voltage supply? imaging application?

Maxim Integrated Products has launched the MAX4800A/MAX4802A 8-channel, high-voltage, low-charge-injection SPST switches controlled by a fast, 20MHz serial interface.

Designed using Maxim's BCDMOS process technology, the devices combine high-voltage, bilateral DMOS switches and low-power CMOS logic, thus enabling efficient control of high-voltage analog signals with low-voltage control signals. Additionally, MAX4800A/MAX4802A support a wide range of high-voltage supplies, including: Vps+/Vps- = +100V/-100V, +185V/-15V, and +40V/-160V.

The MAX4802A integrates 35k? bleed resistors to discharge capacitive loads such as piezoelectric transducers, saving cost and space by eliminating the need for external bleed resistors. Providing high performance and design flexibility, the MAX4800A/MAX4802A are suitable for next-generation ultrasound imaging and printer applications.

The devices are functionally equivalent to the HV2203 and HV2303. Fully specified over the 0Cto +70C commercial temperature range, the MAX4800A/MAX4802A are available in 28-pin PLCC package, as well as 48-pin TQFP and 25-bump CSBGA packages. Prices start at $8 (1,000-up, FOB USA).

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