AD8538/AD8539
1000
V
= 5V
= 1
= 300pF
= 10kΩ
V
= 5V AND 2.7V
SY
SY
A
C
R
V
L
L
A
= 100
V
100
10
A
= 10
V
A
= 1
V
1
0.1
0.01
100
1k
10k
100k
1M
TIME (4µs/DIV)
FREQUENCY (Hz)
Figure 20. AD8538 Large Signal Transient Response
Figure 17. AD8538 Closed-Loop Output Impedance vs. Frequency
60
V
A
= 5V
= –50
SY
V
= 5V
= 25°C
= 2kΩ
SY
V
T
A
100
0
R
L
50
40
30
20
10
0
OS+
0
OS–
–2.5
1
10
100
1000
TIME (10µs/DIV)
LOAD CAPACITANCE (pF)
Figure 21. AD8538 Positive Overload Recovery
Figure 18. AD8538 Small Signal Overshoot vs. Load Capacitance
V
A
= 5V
= –50
SY
V
= 5V AND 2.7V
= 1
= 300pF
= 2kΩ
SY
V
A
C
R
V
L
L
0
–100
2.5
0
TIME (10µs/DIV)
TIME (4µs/DIV)
Figure 22. AD8538 Negative Overload Recovery
Figure 19. AD8538 Small Signal Transient Response
Rev. A | Page 10 of 24
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