350 MHz Single-Supply (5 V)

Triple 2:1 Multiplexers

AD8188/AD8189

FEATURES

Fully buffered inputs and outputs

Fast channel-to-channel switching: 4 ns

Single-supply operation (5 V)

High speed

350 MHz bandwidth (−3 dB) @ 200 mV p-p

300 MHz bandwidth (−3 dB) @ 2 V p-p

Slew rate: 1000 V/μs

Fast settling time: 7 ns to 0.1%

Low current: 19 mA/20 mA

Differential gain error: 0.05%

Differential phase error: 0.05°

Low glitch

All hostile crosstalk

−84 dB @ 5 MHz

−52 dB @ 100 MHz

High off isolation: −95 dB @ 5 MHz

Low cost

Fast, high impedance disable feature for connecting

multiple outputs

Logic-shifted outputs

APPLICATIONS

Switching RGB in LCD and plasma displays

RGB video switchers and routers

FUNCTIONAL BLOCK DIAGRAM

24

23

22

21

20

19

18

17

16

15

14

13

OUT2

OUT1

OUT0

SEL A/B

OE

1

2

3

4

5

6

7

8

9

10

11

12

IN0A

IN0B

IN1B

IN2B

IN2A

IN1A

0

1

2

AD8188/AD8189

ENABLE

SELECT

LOGIC

Figure 1.

GENERAL DESCRIPTION

The AD8188 (G = 1) and AD8189 (G = 2) are high speed,

single-supply, triple 2-to-1 multiplexers. They offer −3 dB small

signal bandwidth of 350 MHz and −3 dB large signal bandwidth

of 300 MHz, along with a slew rate in excess of 1000 V/μs. With

−84 dB of all hostile crosstalk and −95 dB off isolation, the parts

are well suited for many high speed applications. The

differential gain and differential phase error of 0.05% and 0.05°

respectively, along with 0.1 dB flatness to 70 MHz, make the

AD8188 and AD8189 ideal for professional and component

video multiplexing. The parts offer 4 ns switching time, making

them an excellent choice for switching video signals, while

consuming less than 20 mA on a single 5 V supply (100 mW).

Both devices have a high speed disable feature that sets the

outputs into a high impedance state. This allows the building of

larger input arrays while minimizing off-channel output

loading. The devices are offered in a 24-lead TSSOP.

4.0

–1.0

6.0

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

–0.5

0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

0

5

10

15

20

25

TIME (ns)

INPUT

OUTPUT

Figure 2. AD8189 Video Amplitude Pulse Response,

Rev. 0

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