Datasheet

MAX4014/MAX4017/MAX4019/MAX4022
Low-Cost, High-Speed, Single-Supply, Gain of +2
Buffers with Rail-to-Rail Outputs in SOT23
______________________________________________________________________________________ 11
30
25
20
5
10
15
0
CAPACITIVE LOAD (pF)
500 100 200150 250
ISOLATION RESISTANCE, R
ISO
(Ω)
Figure 8. Capacitive Load vs. Isolation Resistance
3
-7
100k 10M 100M1M 1G
-5
FREQUENCY (Hz)
GIAN (dB)
-3
-1
1
2
-6
-4
-2
0
C
L
= 68pF
R
ISO
= 27Ω
C
L
= 120pF
C
L
= 47pF
Figure 9. Small-Signal Gain vs. Frequency with Load
Capacitance and 27Ω Isolation Resistor
Figure 7. Figure 8 is a graph of the optimal isolation resis-
tor versus load capacitance. Figure 9 shows the frequen-
cy response of the MAX4014/MAX4017/MAX4019/
MAX4022 when driving capacitive loads with a 27Ω isola-
tion resistor.
Coaxial cables and other transmission lines are easily dri-
ven when properly terminated at both ends with their
characteristic impedance. Driving back-terminated trans-
mission lines essentially eliminates the lines’ capacitance.