AD8044
300
INPUT VOLTAGE NOISE (nV/ Hz)
100
30
0.03
0.02
0.01
0.00
–0.01
–0.02
–0.03
–0.04
DIFF GAIN (%)
V
S
= +5V
G = +2
R
L
= 150
0
10
DIFF PHASE (Degrees)
10
20
30
40
50
60
70
80
90
100
3
1
10
100
1k
10k
100k
FREQUENCY (Hz)
1M
10M
0.20
0.15
0.10
0.05
0.00
–0.05
–0.10
–0.15
–0.20
0
V
S
= +5V
G = +2
R
L
= 150
10
20
30
40
50
60 70
80
MODULATING RAMP LEVEL (IRE)
90
100
Figure 10. Input Voltage Noise vs. Frequency
Figure 13. Differential Gain and Phase Errors
–30
V
O
= 2V p-p
TOTAL HARMONIC DISTORTION (dBc)
–40
–50
–60
–70
–80
–90
V
S
= +3V,
R
L
= 100
A
V
= –1
V
S
= +5V,
R
L
= 100
A
V
= +2
V
S
= +5V,
R
L
= 100
A
V
= +1
0.3
0.2
0.1
NORMALIZED GAIN (dB)
0.0
–0.1
–0.2
–0.3
–0.4
–0.5
–0.6
1M
V
S
= +5V
R
F
= 200
R
L
= 150 TO 2.5V
G = +2
Vi = 0.2V p-p
11.6MHz
–100
1
V
S
= +5V,
R
L
= 1k
A
V
= +2
V
S
= +5V,
R
L
= 1k
A
V
= +1
2
3
4
5
6 7
FUNDAMENTAL FREQUENCY (MHz)
8 9 10
Figure 11. Total Harmonic Distortion
10M
FREQUENCY (Hz)
100M
Figure 14. 0.1 dB Gain Flatness
–30
–40
–50
WORST HARMONIC (dBc)
80
10MHz
70
60
OPEN-LOOP GAIN (dB)
–60
–70
–80
–90
–100
–110
–120
–130
–140
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
V
S
= +5V
R
L
= 2k
C
L
= 5pF
50
40
30
20
PHASE
PHASE MARGIN (Degrees)
5MHz
GAIN
180
135
90
45
1MHz
V
S
= +5V
R
L
= 2k TO 2.5V
G = +2
10
0
–10
80MHz
0
OUTPUT VOLTAGE (V p-p)
–20
30k
100k
Figure 12. Worst Harmonic vs. Output Voltage
10M
1M
FREQUENCY (Hz)
100M
Figure 15. Open-Loop Gain and Phase Margin
vs. Frequency
REV. B
–7–
AD [ ANALOG DEVICES ]
