Datasheet

AD8538/AD8539 Data Sheet
Rev. B | Page 10 of 24
1000
0.01
1
0.1
10
100
100
1k 10k 100k 1M
06741-022
FREQUENC
Y
(Hz)
OUTPUT IMPEDANCE (Ω)
V
SY
= 5V AND 2.7V
A
V
= 1
A
V
= 10
A
V
= 100
Figure 17. AD8538 Closed-Loop Output Impedance vs. Frequency
60
0
1
1000
06741-015
LOAD CAPACITANCE (pF)
SMALL SIGNAL OVERSHOOT (%)
10
20
30
40
50
10 100
V
SY
= 5V
T
A
= 25°C
R
L
= 2kΩ
OS+
OS–
Figure 18. AD8538 Small Signal Overshoot vs. Load Capacitance
TIME (4µs/DIV)
VOLTAGE (50mV/DIV)
06741-016
V
SY
= 5V AND 2.7V
A
V
= 1
C
L
= 300pF
R
L
= 2kΩ
Figure 19. AD8538 Small Signal Transient Response
TIME (4µs/DIV)
VO
LTAGE (1V/DIV)
06741-017
V
SY
= 5V
A
V
= 1
C
L
= 300pF
R
L
= 10kΩ
Figure 20. AD8538 Large Signal Transient Response
TIME (10µs/DIV)
06741-018
V
SY
= 5V
A
V
= –50
V
OUT
(V) V
IN
(mV)
100
0
0
–2.5
Figure 21. AD8538 Positive Overload Recovery
TIME (10µs/DIV)
V
OUT
(V) V
IN
(mV)
06741-019
V
SY
= 5V
A
V
= –50
0
–100
2.5
0
Figure 22. AD8538 Negative Overload Recovery