Datasheet

AD8657
Rev. A | Page 11 of 24
0
5
10
15
20
25
30
35
0 3 6 9 12 15
18
I
SY
PER AMP (µA)
V
SY
(V)
–40°C
+25°C
+85°C
+125°C
08804-020
Figure 27. Supply Current vs. Supply Voltage
–135
–90
–45
0
45
90
135
–60
–20
–40
0
20
40
60
1k 10k 100k 1M
PHASE (Degrees)
OPEN-LOOP GAIN (dB)
FREQUENCY (Hz)
V
SY
= 2.7V
R
L
= 1MΩ
PHASE
GAIN
08804-021
C
L
= 10pF
C
L
= 100pF
Figure 28. Open-Loop Gain and Phase vs. Frequency
–60
–40
–20
0
20
40
60
100 1k 10k 100k 1M
CLOSED-LOOP GAIN (dB)
FREQUENCY (Hz)
V
SY
= 2.7V
A
V
= 100
A
V
= 10
A
V
= 1
08804-022
Figure 29. Closed-Loop Gain vs. Frequency
0
10
20
30
40
50
60
–50 –25 0 25 50 75
100 125
I
SY
PER AMP (µA)
TEMPERATURE (°C)
V
SY
= 2.7V
V
SY
= 18V
08804-023
Figure 30. Supply Current vs. Temperature
1k 10k 100k 1M
OPEN-LOOP GAIN (dB)
FREQUENCY (Hz)
V
SY
= 18V
R
L
= 1MΩ
08804-024
PHASE
C
L
= 10pF
C
L
= 100pF
–135
–90
–45
0
45
90
135
–60
–20
–40
0
20
40
60
GAIN
PHASE (Degrees)
Figure 31. Open-Loop Gain and Phase vs. Frequency
–60
–40
–20
0
20
40
60
100 1k 10k 100k 1M
CLOSED-LOOP GAIN (dB)
FREQUENCY (Hz)
V
SY
= 18V
A
V
= 100
A
V
= 10
A
V
= 1
08804-025
Figure 32. Closed-Loop Gain vs. Frequency