MAX4135 Datasheet, PDF (8/12 Pages) Maxim Integrated Products – 1-Input/6-Output Video Distribution Amplifiers

1-Input/6-Output
Video Distribution Amplifiers
+5VDC
-5VDC
+5VDC
75Ω*
0.1µF
75Ω*
75Ω*
0.1µF
75Ω*
75Ω*
0.1µF
75Ω*
OUT1
1
VCCO
2
OUT2
3
AGND
4
OUT3
5
VEEO
6
VEEO
7
OUT4
8
AGND
9
OUT5
10
VCCO
11
OUT6
12
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
MAX4135
SW1
SW2
SW3
IN
SEL1
24
SEL2
23
SEL3
22
AGND
21
IN+
20
R_F
RG ^VEEI
19
AGND
18
N.C.
17
VCCI
16
SW4
SEL4
15
SW5
SEL5
14
SW6
SEL6
13
VIDEO
IN
75Ω*
-5VDC
0.1µF
+5VDC
0.1µF
* TO TERMINATE TRANSMISSION LINE
Figure 1. MAX4135 Typical Operating Circuit
__________Applications Information
Grounding, Bypassing,
and PC Board Layout
To obtain the MAX4135/MAX4136’s full 185MHz band-
width, Microstrip and Stripline techniques are recom-
mended in most cases. To ensure that the PC board
does not degrade the amplifier’s performance, design
the board for a frequency greater than 1GHz. Even with
very short traces, use these techniques at critical
points, such as inputs and outputs. Whether you use a
constant-impedance board or not, observe the follow-
ing guidelines when designing the board:
• Do not use wire-wrap boards. They are too inductive.
• Do not use IC sockets. They increase parasitic
capacitance and inductance.
• In general, surface-mount components have shorter
leads and lower parasitic reactance, giving better
high-frequency performance than through-hole com-
ponents.
• The PC board should have at least two layers, with
one side a signal layer and the other a ground plane.
• Keep signal lines as short and straight as possible.
Do not make 90° turns; round all corners.
• The ground plane should be as free from voids as
possible.
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