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SPDT switches offer low capacitance

Posted: 30 Dec 2005 ?? ?Print Version ?Bookmark and Share

Keywords:Analog Devices? adi? ADG1233? ADG1234? SPDT switch?

Analog Devices Inc.'s (ADI) ADG1233 and ADG1234 single-pole double-throw (SPDT) switches operate with 12V or 15V supplies to deliver low capacitance and charge injection.

Both devices were designed to meet a need among industrial design engineers for analog switches that allow increased data acquisition speeds. The ADG1233 and ADG1234 ICs satisfy this requirement by offering extremely low capacitance and charge injection. Their low capacitance and low charge injection cause smaller glitches and lower offset voltages, enabling faster sampling and increased performance in data-acquisition systems and video signal routers.

Manufactured using ADI's proprietary iCMOS (industrial CMOS) process technology, the ADG1233 and ADG1234 switches provide low off-capacitance (1.5pF) and charge injection (<1pC), making them suitable for fast data-acquisition and sample-and-hold applications that require low glitch and fast settling. The switches fast on/off switching speed (120ns/40ns) and wide -3dB bandwidth (900MHz) make them suitable for video switching, although external video buffers may be required. The switches features 120-ohm on-resistance, 3.5-ohm channel-to-channel match, and 20-ohm variation over the 0-to-VDD signal range.

The ADG1233 triple SPDT switch comes in 16-lead TSSOP and 4-by-4mm LFCSP packages, while the ADG1234 quad SPDT switch is offered in 20-lead TSSOP and 4-by-4mm LFCSP packages. According to the company, these packages enable a 77 percent reduction in board space compared to existing solutions. The ultra-low power dissipation (<0.03?W) enabled by the iCMOS process technology makes these devices well suited for portable and battery-powered instrumentation equipment. Both devices are offered over the extended industrial temperature range (-40C to 125C).

The ADG1233 and ADG1234 monolithic analog switches are already available in production volume, and are priced at $3.95 per unit in 1,000-piece quantities.

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Related Datasheets
Part Number Description Category
? ADG1234 Low Capacitance, Quad SPDT ±15 V/12 V iCMOS? Switch Optoelectronic Components
? ADG1233 Low Capacitance, Triple SPDT ±15 V/12 V iCMOS? Switch Optoelectronic Components

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