AD8044
4
3
2
CLOSED-LOOP GAIN (dB)
1
0
–1
–2
V
S
= +5V
R
L
= 2k TO 2.5V
C
L
= 5pF
G = +1
V
O
= 0.2V p-p
+85 C
+25 C
–40 C
70
60
50
TIME (ns)
G = –1
R
L
= 2k
V
S
= +3V, 0.1%
V
S
= +5V, 0.1% AND
V
S
= 5V, 0.1%
40
30
20
V
S
= +3V, 1%
V
S
= +5V, 1% AND
V
S
= 5V, 1%
–3
–4
–5
1M
10
0
0.5
10M
FREQUENCY (Hz)
100M
1
1.5
INPUT STEPS (V p-p)
2
Figure 16. Closed-Loop Frequency Response
vs. Temperature
Figure 19. Settling Time vs. Input Step
6
5
4
CLOSED-LOOP GAIN (dB)
0
G = +1
R
L
= 2k
C
L
= 5pF
V
O
= 0.2V p-p
+3V
+5V
5V
CMRR (dB)
–10
V
S
=
5V
–20
–30
–40
–50
–60
V
S
= +3V
3
2
1
0
–1
–2
–3
–4
100k
5V
+3V
+5V
1M
10M
FREQUENCY (Hz)
100M
–70
–80
0.03
0.1
1
10
FREQUENCY (MHz)
100
500
Figure 17. Closed-Loop Frequency Response vs. Supply
Figure 20. CMRR vs. Frequency
1.00
OUTPUT SATURATION VOLTAGE (V)
100
R
BT
= 50
0.875
0.750
V
S
= +5V
+5V –V
OH
(+125 C)
OUTPUT RESISTANCE ( )
10
G = +1
V
S
= +5V
R
BT
+5V –V
OH
(+25 C)
0.625
0.500
0.375
0.250
V
OL
(+125 C)
+5V –V
OH
(–55 C)
1
V
OUT
0.1
R
BT
= 0
0.01
0.03
0.1
1
10
FREQUENCY (MHz)
100
500
0.125
V
OL
(–55 C)
V
OL
(+25 C)
0.00
0
3
6
9
12
15
18
21
LOAD CURRENT (mA)
24
27
30
Figure 18. Output Resistance vs. Frequency
Figure 21. Output Saturation Voltage vs. Load Current
–8–
REV. B
AD [ ANALOG DEVICES ]
