600 MH, 32 × 16 Buffered Analog Crosspoint Switch

The AD8104/AD8105 are high speed, 32 × 16 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 −90 dB isolation (@ 5 MHz), the AD8104/AD8105 are useful in many high speed applications. The 0.1 dB flatness, which is greater than 50 MHz, makes the AD8104/AD8105 ideal for composite video switching.

The AD8104/AD8105 include 16 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 AD8104 has a differential gain of +1, while the AD8105 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 340 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 AD8104/AD8105 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 × 16 high speed, nonblocking switch array

* Differential or single-ended operation

* Differential G = +1 (AD8104) or G = +2 (AD8105)

* Pin compatible with AD8117/AD8118, 32 x 32 switch arrays

* Flexible power supplies

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

* Serial or parallel programming of switch array

* Excellent video performance

* >50 MHz 0.1 dB gain flatness

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

* 0.05° phase error (RL = 150 Ω)

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

* Excellent ac performance

* Bandwidth: 600 MHz

* Slew rate: 1800 V/μs

* Settling time: 2.5 ns to 1%

* Low power of 1.7 W

* Low all hostile crosstalk

* < −70 dB at 5 MHz

* < −40 dB @ 600 MHz

* Reset pin allows disabling of all outputs (connected through a capacitor to ground provides power-on reset capability)

* 304-ball BGA package (31 mm × 31 mm)