OPA2180
OPA4180
SBOS584B –NOVEMBER 2011–REVISED DECEMBER 2011
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TYPICAL CHARACTERISTICS (continued)
VS = ±18 V, VCM = VS/2, RLOAD = 10 kΩ connected to VS/2, and CL = 100 pF, unless otherwise noted.
OPEN-LOOP GAIN AND PHASE vs FREQUENCY
OPEN-LOOP GAIN vs TEMPERATURE
140
120
100
80
180
3
2.5
2
VSUPPLY = 4 V, RL = 10 kW
VSUPPLY = 36 V, RL = 10 kW
Gain
Phase
135
90
45
0
60
1.5
1
40
20
0
0.5
0
−20
10
100
1k
10k
100k
1M
10M
100M
Frequency (Hz)
G007
-55 -35 -15
5
25
45
65
85
105 125
Temperature (°C)
Figure 7.
Figure 8.
SMALL-SIGNAL OVERSHOOT vs CAPACITIVE LOAD
(100-mV Output Step)
OPEN-LOOP OUTPUT IMPEDANCE vs FREQUENCY
10k
40
RL = 10 kW
35
30
25
20
15
10
5
ROUT = 0 W
1k
100
10
ROUT = 25 W
ROUT = 50 W
G = +1
+18
V
ROUT
Device
1
RL
CL
-18
V
0
1m
1
10
100
1k
10k
100k
1M
10M
0
100 200 300 400 500 600 700 800 900 1000
Capacitive Load (pF)
Frequency (Hz)
Figure 9.
Figure 10.
SMALL-SIGNAL OVERSHOOT vs CAPACITIVE LOAD
(100-mV Output Step)
NO PHASE REVERSAL
40
+18 V
ROUT = 0 W
ROUT = 25 W
ROUT = 50 W
35
30
25
20
15
10
5
Device
-18 V
37 VPP
Sine Wave
(±18.5 V)
RF = 10 kW
RI = 10 kW
G = -1
+18 V
ROUT
VIN
Device
CL
VOUT
RL = 10 kW
-18 V
0
Time (100 ms/div)
0
100 200 300 400 500 600 700 800 900 1000
Capacitive Load (pF)
Figure 11.
Figure 12.
8
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