Datasheet

AD8638/AD8639
Rev. F | Page 8 of 20
T
A
= 25°C, unless otherwise noted.
FREQUENCY (Hz)
GAIN (dB)
120
100
80
60
40
20
0
–120
–100
–80
–60
–40
–20
PHASE (Degrees)
120
100
80
60
40
20
0
–120
–100
–80
–60
–40
–20
1k 10k 100k 1M 10M
06895-016
V
SY
= ±2.5V
R
L
= 2k
PHASE
GAIN
C
L
= 200pF
C
L
= 20pF
Figure 17. Open-Loop Gain and Phase vs. Frequency
FREQUENCY (Hz)
CLOSED-LOOP GAIN (dB)
60
–40
1k 10M
0
6895-018
10k 100k 1M
40
20
0
–20
V
SY
= ±2.5V
R
L
= 2k
C
L
= 20pF
A
V
= +1
A
V
= +10
A
V
= +100
Figure 18. Closed-Loop Gain vs. Frequency
FREQUENCY (Hz)
Z
OUT
()
1k
10
100
1
0.1
100 1k 10M
06895-100
10k 100k 1M
V
SY
= ±2.5V
A
V
= –100
A
V
= –10
A
V
= +1
Figure 19. Output Impedance vs. Frequency
FREQUENCY (Hz)
1k 10k 100k 1M 10M
06895-017
V
SY
= ±8V
R
L
= 2k
PHASE
GAIN
C
L
= 200pF
C
L
= 20pF
GAIN (dB)
120
100
80
60
40
20
00
–120
–100
–80
–60
–40
–20
PHASE (Degrees)
120
100
80
60
40
20
–120
–100
–80
–60
–40
–20
Figure 20. Open-Loop Gain and Phase vs. Frequency
FREQUENCY (Hz)
CLOSED-LOOP GAIN (dB)
60
–40
1k 10M
06895-019
10k 100k 1M
40
20
0
–20
V
SY
= ±8V
R
L
= 2k
C
L
= 20pF
A
V
= +1
A
V
= +10
A
V
= +100
Figure 21. Closed-Loop Gain vs. Frequency
FREQUENCY (Hz)
Z
OUT
()
10
100
1
1k
0.1
100 10M1M100k10k1k
06895-119
V
SY
= ±8V
A
V
= –100
A
V
= –10
A
V
= +1
Figure 22. Output Impedance vs. Frequency