Datasheet

MAX4310–MAX4315
The bypass capacitors should include a 100nF, ceram-
ic surface-mount capacitor between each supply pin
and the ground plane, located as close to the package
as possible. Optionally, place a 10µF tantalum capaci-
tor at the power-supply pin’s point of entry to the PC
board to ensure the integrity of incoming supplies. The
power-supply trace should lead directly from the tanta-
lum capacitor to the V
CC
and V
EE
pins. To minimize
parasitic inductance, keep PC traces short and use sur-
face-mount components. If input termination resistors
and output back-termination resistors are used, they
should be surface-mount types, and should be placed
as close to the IC pins as possible.
High-Speed, Low-Power, Single-Supply
Multichannel, Video Multiplexer-Amplifiers
14 ______________________________________________________________________________________
MAX4313
R
T
75Ω
8OUT
IN0
IN1
4
5
17
GND
A0
R
T
75Ω
500Ω
500Ω
75Ω CABLE
OUT
R
T
75Ω
R
T
75Ω
75Ω CABLE
75Ω CABLE
Figure 5. Video Line Driver
10
15
20
25
30
0 50 100 150 200 250
MAX4310-FIG08
CAPACITIVE LOAD (pF)
ISOLATION RESISTANCE R
ISO
(Ω)
Figure 8. Optimal Isolation Resistance vs. Capacitive Load
100M 1G
-6
4
3
2
0
-1
-2
-3
-4
-5
1
100k 1M 10M
MAX4310-FIG06
FREQUENCY (Hz)
GAIN (dB)
V
OUT
= 100mVp-p
10pF LOAD
5pF LOAD
15pF LOAD
Figure 6. Small-Signal Gain vs. Frequency with a Capacitive
Load and No-Isolation Resistor
MAX4313
R
ISO
8OUT
IN0
IN1
4
5
17
GND
A0
R
L
C
L
500Ω
500Ω
R
T
75Ω
R
T
75Ω
75Ω CABLE
75Ω CABLE
Figure 7. Using an Isolation Resistor (R
ISO
) for High-Capacitive
Loads
100M 1G
-6
4
3
2
0
-1
-2
-3
-4
-5
1
100k 1M 10M
MAX4310-FIG09
FREQUENCY (Hz)
GAIN (dB)
V
OUT
= 100mVp-p
47pF LOAD
90pF LOAD
120pF LOAD
Figure 9. Small-Signal Gain vs. Frequency with a Capacitive
Load and 27Ω No-Isolation Resistor