AD8105 600 MHz, 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

Features and Benefits

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

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)

>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%

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

< −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)

Switches & Multiplexers

Buffered Analog Crosspoint Switches

Data Sheets

Document	note
AD8104/AD8105; 600 MHz, 32 x 16 Buffered Analog Crosspoint Switch Data Sheet (Rev. A)	PDF 872.6 K

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD8105ABPZ Production	304 Ball SBGA	OTH 27	-40 to 85C	177.1	177.1	Y

Evaluation Boards

Part Number	Description	Price	RoHS
AD8105-EVALZ	AD8105 Evaluation Board	-1	Y

AD8104/AD8105; 600 MHz, 32 x 16 Buffered Analog Crosspoint Switch Data Sheet (Rev. A) ad8104