AD8538/AD8539
10000
V
SY
= 5V
T
A
= 25°C
70
60
50
135
OUTPUT SATURATION VOLTAGE (mV)
1000
OPEN-LOOP GAIN (dB)
V
SY
– V
OH
100
V
OL
10
SOURCE
40
30
20
ФM
10
0
90
45
1
SINK
06741-009
0
V
SY
= ±2.5V AND ±1.35V
R
L
= 100kΩ
C
L
= 20pF
10k
100k
0.1
–10
–20
1k
0.01
0.1
LOAD CURRENT (mA)
1
10
FREQUENCY (Hz)
Figure 11. AD8538 Output Saturation Voltage vs. Load Current
35
Figure 14. AD8538 Open-Loop Gain and Phase vs. Frequency
120
V
SY
= 5V
R
L
= 10kΩ
V
SY
– V
OH
V
SY
= 5V AND 2.7V
T
A
= 25°C
OUTPUT SATURATION VOLTAGE (mV)
30
25
20
V
OL
15
10
5
0
–40
100
80
CMRR (dB)
60
40
20
06741-010
06741-013
–25
–10
5
20
35
50
65
80
95
110
125
0
100
1k
10k
FREQUENCY (Hz)
100k
1M
TEMPERATURE (°C)
Figure 12. AD8538 Output Saturation Voltage vs. Temperature
60
Figure 15. AD8538 CMRR vs. Frequency
100
V
SY
= ±2.5V AND ±1.35V
T
A
= 25°C
V
SY
= 5V AND 2.7V
C
L
= 20pF
R
L
= 2kΩ
A
V
= 100
80
+PSRR
CLOSED-LOOP GAIN (dB)
40
20
A
V
= 10
PSRR (dB)
60
–PSRR
40
0
A
V
= 1
20
06741-011
06741-014
–20
1k
10k
100k
1M
0
100
1k
10k
FREQUENCY (Hz)
100k
1M
FREQUENCY (Hz)
Figure 13. AD8538 Closed-Loop Gain vs. Frequency
Figure 16. AD8538 PSRR vs. Frequency
Rev. A | Page 9 of 24
06741-012
0.01
0.001
–45
1M
OPEN-LOOP PHASE SHIFT (Degrees)
AD [ ANALOG DEVICES ]
