Ultra-Small, Low-Cost, 210MHz, Single-Supply
Op Amps with Rail-to-Rail Outputs
30
25
R
R
F
G
20
15
10
5
R
ISO
V
OUT
MAX445 _
V
C
IN
L
50Ω
R
TIN
0
0
50
100
150
200
250
CAPACITIVE LOAD, C (pF)
L
Figure 2. Driving a Capacitive Load Through an Isolation Resistor
Figure 3. Capacitive Load vs. Isolation Resistance
6
5
3
R
= 27Ω
ISO
2
1
C = 47pF
L
C = 15pF
L
4
3
0
2
-1
-2
-3
-4
-5
-6
-7
C = 68pF
L
C = 10pF
L
1
C = 120pF
L
0
C = 5pF
L
-1
-2
-3
-4
100k
1M
10M
FREQUENCY (Hz)
100M
1G
100k
1M
10M
FREQUENCY (Hz)
100M
1G
Figure 4. Small-Signal Gain vs. Frequency with Load
Capacitance and No Isolation Resistor
Figure 5. Small-Signal Gain vs. Frequency with Load
Capacitance and 27Ω Isolation Resistor
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9
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
