AD8538/AD8539
1000
AD8539
= 5V
AD8539
V
900
800
700
600
500
400
300
SY
V
= ±2.5V
SY
A
C
R
= 1
= 300pF
= 10kΩ
V
L
L
A
= 100
A
= 10
V
A
= 1
V
V
200
100
0.01
100
TIME (4µs/DIV)
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 46. AD8539 Closed-Loop Output Impedance vs. Frequency
Figure 49. AD8539 Large Signal Transient Response
60
0.15
0.10
5
AD8539
AD8539
V
= ±2.5V
SY
V
= ±2.5V
A = –50
V
SY
4
R
= 2kΩ
50
40
30
20
10
0
L
0.05
3
INPUT VOLTAGE
0
2
–0.05
–0.10
–0.15
–0.20
–0.25
1
OS+
0
–1
–2
–3
OS–
OUTPUT VOLTAGE
1
10
100
1k
TIME (20µs/DIV)
CAPACITANCE (pF)
Figure 50. AD8539 Positive Overload Recovery
Figure 47. AD8539 Small Signal Overshoot vs. Load Capacitance
0.05
0
7.5
6.5
5.5
4.5
3.5
2.5
1.5
0.5
–0.5
AD8539
V
= 5V
SY
A
C
R
= 1
= 300pF
= 2kΩ
V
L
L
INPUT VOLTAGE
AD8539
–0.05
–0.10
–0.15
–0.20
–0.25
–0.30
–0.35
V
= ±2.5V
SY
A
= –50
V
OUTPUT VOLTAGE
TIME (2µs/DIV)
TIME (20µs/DIV)
Figure 48. AD8539 Small Signal Transient Response
Figure 51. AD8539 Negative Overload Recovery
Rev. A | Page 16 of 24
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