MAX4315 Maxim, MAX4315 Datasheet - Page 14

• Manufacturer Part Number: MAX4315
• Description: The MAX4310–MAX4315 single-supply mux-amps combine high-speed operation, low-glitch switching, and excellent video specifications
• Manufacturer: Maxim

High-Speed, Low-Power, Single-Supply
Multichannel, Video Multiplexer-Amplifiers
Figure 5. Video Line Driver
Figure 7. Using an Isolation Resistor (R
Loads
14
Figure 6. Small-Signal Gain vs. Frequency with a Capacitive
Load and No-Isolation Resistor
75Ω CABLE
75Ω CABLE
75Ω CABLE
75Ω CABLE
______________________________________________________________________________________
75Ω
75Ω
R
R
75Ω
75Ω
T
T
R
R
T
T
-1
-2
-3
-4
-5
-6
4
3
2
1
0
4
5
100k
4
5
V
IN0
IN1
1
OUT
A0
IN0
IN1
1
A0
= 100mVp-p
MAX4313
1M
MAX4313
FREQUENCY (Hz)
500Ω
500Ω
10pF LOAD
GND
15pF LOAD
500Ω
500Ω
7
10M
5pF LOAD
GND
7
OUT
OUT
ISO
8
100M
8
75Ω
) for High-Capacitive
R
T
R
ISO
75Ω CABLE
C
1G
L
75Ω
R
T
R
L
OUT
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
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.
Figure 8. Optimal Isolation Resistance vs. Capacitive Load
Figure 9. Small-Signal Gain vs. Frequency with a Capacitive
Load and 27Ω No-Isolation Resistor
30
25
20
15
10
-1
-2
-3
-4
-5
-6
4
3
2
1
0
100k
0
V
OUT
= 100mVp-p
50
1M
CAPACITIVE LOAD (pF)
FREQUENCY (Hz)
120pF LOAD
90pF LOAD
CC
100
10M
and V
150
EE
47pF LOAD
100M
200
pins. To minimize
250
1G