600 MH, 32 × 32 Buffered Analog Crosspoint Switch

The AD8117/AD8118 are high speed, 32 × 32 analog crosspoint switch matrices. They offer 600 MHz bandwidth and slew rate of 1800 V/μs for high resolution computer graphics (RGB) signal switching. With less than −70 dB of crosstalk and −80 dB isolation (at 5 MHz), the AD8117/AD8118 are useful in many high speed applications. The 0.1 dB flatness greater than 50 MHz makes the AD8117/AD8118 ideal for composite video switching.

The AD8117/AD8118 include 32 independent output buffers that can be placed into a high impedance state for paralleling crosspoint outputs so that off-channels present minimal loading to an output bus. The AD8117 has a differential gain of +1, while the AD8118 has a differential gain of +2 for ease of use in back terminated load applications. They operate as fully differential devices or can be configured for single-ended operation. Either a single +5 V supply or dual ±2.5 V supplies can be used, while consuming only 500 mA of idle current with all outputs enabled. The channel switching is performed via a double-buffered, serial digital control (which can accommodate daisy chaining of several devices), or via a parallel control, allowing updating of an individual output without reprogramming the entire array.

The AD8117/AD8118 are packaged in a 304-ball BGA package and are available over the extended industrial temperature range of −40°C to +85°C.

Applications

* Routing of high speed signals including RGB and component

video routing

– KVM

– Compressed video (MPEG, wavelet)

– Data communications

* High channel count, 32 × 32 high speed, nonblocking switch array

* Differential or single-ended operation

* Differential G = +1

* Flexible power supplies

* Single +5 V supply, or dual ±2.5 V supplies

* Serial or parallel programming of switch array

* High impedance output disable allows connection of multiple devices with minimal loading on output bus

* Excellent video performance

* >50 MHz 0.1 dB gain flatness

* 0.05%/0.05° differential gain/phase error (RL = 150 Ω)

* Excellent ac performance

* Bandwidth: 600 MHz

* Slew rate: 1800 V/μs

* Settling time: 2.5 ns to 1%

* See data sheet for additional features