Op Amps for Everyone - The Repeater Builder's Technical ...

Internal Compensation
– Large-Signal Differential Amplification – dB
A VD
m
LARGE-SIGNAL DIFFERENTIAL VOLTAGE
AMPLIFICATION AND PHASE MARGIN
vs
FREQUENCY
100
80
60
40
20
0
–20
–40
100
A VD
Phase
300
240
180
120
60
0
–60
–90
1 k 10 k 100 k 1 M 10 M
f – Frequency – Hz
V DD ± = 5 V R L = 600 kΩ
C L = 600 pF T A = 25°C
φ – Phase Margin – degrees
– Large-Signal Differential Amplification – dB
LARGE-SIGNAL DIFFERENTIAL VOLTAGE
AMPLIFICATION AND PHASE MARGIN
vs
FREQUENCY
100
80
A VD
φ m – Phase Margin – degrees
60
40
20
0
–20
A VD
Phase
300
240
180
120
60
–60
–40 –90
100 1 k 10 k 100 k 1 M 10 M
f – Frequency – Hz
V DD ± = 2.7 V R L = 600 kΩ
C L = 600 pF T A = 25°C
0
Figure 7–6. TLV277X Frequency Response Plots
VOLTAGE-FOLLOWER
SMALL-SIGNAL PULSE RESPONSE
INVERTING SMALL-SIGNAL
PULSE RESPONSE
100
100
VO – Output Voltage – mV
80
60
40
20
0
–20
–40
VO – Output Voltage – mV
80
60
40
20
0
–20
–40
–60
0 1 2 3 4 5
t – Time – µs
–60
0 1 2 3 4 5
t – Time – µs
V DD = 2.7 V R L = 600 kΩ
C L = 100 pF T A = 25°C
A V = 1
V DD = 2.7 V R L = 600 kΩ
C L = 100 pF T A = 25°C
A V = –1
Figure 7–7. TLV227X Time Response Plots
Voltage-Feedback Op Amp Compensation
7-7