Datasheet

 
  
   

SLOS185D − FEBRUARY 1997 − REVISED AUGUST 2006
37
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 56
om − Phase Margin
PHASE MARGIN
vs
LOAD CAPACITANCE
C
L
− Load Capacitance − pF
m
φ
10
1
10
2
10
3
10
4
75°
60°
45°
30°
15°
0°
R
null
= 200 Ω
R
null
= 500 Ω
R
null
= 50 Ω
R
null
= 0
T
A
= 25°C
R
null
= 100 Ω
R
null
= 10 Ω
50 kΩ
50 kΩ
V
DD −
V
DD +
R
null
C
L
V
I
+
−
Figure 57
Gain Margin − dB
GAIN MARGIN
vs
LOAD CAPACITANCE
C
L
− Load Capacitance − pF
20
10
5
0
15
10
1
10
2
10
3
10
5
R
null
= 100 Ω
T
A
= 25°C
R
null
= 50 Ω
10
4
R
null
= 500 Ω
R
null
= 200 Ω
R
null
= 0
R
null
= 10 Ω
Figure 58
− Unity-Gain Bandwidth − kHz
UNITY-GAIN BANDWIDTH
vs
LOAD CAPACITANCE
C
L
− Load Capacitance − pF
B
1
150
25
100
0
200
125
175
50
75
10
1
10
2
10
3
10
4
10
5
T
A
= 25°C
†
See application information
Figure 59
Overestimation of Phase Margin
OVERESTIMATION OF PHASE MARGIN
†
vs
LOAD CAPACITANCE
C
L
− Load Capacitance − pF
15
10
5
0
20
25
10
1
10
2
10
3
10
4
10
5
T
A
= 25°C
R
null
= 100 Ω
R
null
= 50 Ω
R
null
= 10 Ω
R
null
= 500 Ω
R
null
= 200 Ω
‡
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
†
For all curves where V
DD
= 5 V, all loads are referenced to 2.5 V. For all curves where V
DD
= 3 V, all loads are referenced to 1.5 V.