32-by-32 crosspoint switches handle QXGA video

Norwood, Mass.&#8212Analog Devices says its 32-by-32 analog crosspoint switches, the AD8117 and AD8118, have a bandwidth of more than 500
MHz&#8212 65 percent higher than the nearest competing 32-by-32 arrays. As such, they're billed as the industry's first such single chips for efficiently routing Quantum Extended Graphics Array (QXGA) video signals.

The AD8117 (unity-gain) and AD8118 (G=2) devices take the place of at least eight analog crosspoint switches to achieve a comparable level of video switching performance for the QXGA standard (2048-by-1536 pixels), according to the company. This combination of bandwidth and array side is achieved through what the company says is the industry's first fully-differential analog crosspoint core architecture. The design offers customers greater flexibility by enabling any combination of differential or single-ended inputs and outputs. Features include a slew rate of 1800 volts/microsecond, gain flatness of 0.1 dB out to 100 MHz, and crosstalk of -40 dB at 500 MHz.

These devices consume just 2.5 mW per point&#8212 reportedly 50 percent less than competitive QXGA-capable analog crosspoint solutions. The devices will run off a single 5-volt supply (or &plusmn2.5-volt supplies) and eliminate the need for external heat sinks.

These switches can be easily programmed. Channel switching is performed via a double-buffered, serial digital control, which can accommodate daisy chaining of
several devices, or through a parallel control that allows updating of individual outputs without reprogramming the entire array.

Click here and here for additional information on the switches.
The AD8117 and AD8118 are sampling now,
with full production quantities available in 4Q. Both switches, in 304-ball thermally-enhanced BGA
packages, are priced at $295 each in 100-piece

Analog Devices , 1-800-262-5643,

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