AD8109-EB Analog Devices, AD8109-EB Datasheet

AD8109-EB

Manufacturer Part Number

AD8109-EB

Description

250MHz, 8x8 Buffered Video Crosspoint Switch(Gain=2)

Manufacturer

Analog Devices

Datasheet

1.AD8109-EB.pdf (28 pages)

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PRODUCT DESCRIPTION

The AD8108 and AD8109 are high-speed 8 × 8 video cross-

point switch matrices. They offer a –3 dB signal bandwidth

greater than 250 MHz and channel switch times of less than

25 ns with 1% settling. With –83 dB of crosstalk and –98 dB

isolation (@ 5 MHz), the AD8108/AD8109 are useful in many

high-speed applications. The differential gain and differential

*Patent Pending.

phase of better than 0.02% and 0.02° respectively along with

0.1 dB flatness out to 60 MHz make the AD8108/AD8109 ideal

for video signal switching.

The AD8108 and AD8109 include eight independent output buff-

ers that can be placed into a high impedance state for paralleling

crosspoint outputs so that off channels do not load the output bus.

The AD8108 has a gain of +1, while the AD8109 offers a gain

of +2. They operate on voltage supplies of ± 5 V while consuming

only 45 mA of idle current. The channel switching is performed via

a serial digital control (which can accommodate “daisy chaining”

of several devices) or via a parallel control allowing updating of

an individual output without re-programing the entire array.

The AD8108/AD8109 is packaged in an 80-lead LQFP package

and is available over the extended industrial temperature range

of –40°C to +85°C.

8 INPUTS

325 MHz, 8

UPDATE

DATA IN

RESET

CLK

AD8108/AD8109

FUNCTIONAL BLOCK DIAGRAM

SER/PAR D0 D1 D2 D3

PARALLEL LATCH

32-BIT SHIFT REGISTER

Crosspoint Switches

PARALLEL LOADING

4:8 DECODERS

AD8108/AD8109

DECODE

SWITCH

MATRIX

WITH 4-BIT

8 Buffered Video

OUTPUT

BUFFER

G = +1,

G = +2

SET INDIVIDUAL

OR RESET ALL

OUTPUTS

TO "OFF"

DATA

OUT

8 OUTPUTS

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