AD8047/AD8048
–20
0.5
–30
HARMONIC DISTORTION – dBc
R
L
= 100Ω
V
OUT
= 2V p-p
0.4
0.3
0.2
–40
–50
ERROR – %
R
L
= 100Ω
R
F
= 0Ω
V
OUT
= 2V STEP
–60
–70
–80
–90
3RD HARMONIC
–100
–110
–120
10k
100k
1M
FREQUENCY – Hz
10M
100M
2ND HARMONIC
0.1
0.0
–0.1
–0.2
–0.3
–0.4
–0.5
0
5
10
20
15
25
30
SETTLING TIME – ns
35
40
45
Figure 21. AD8047 Harmonic Distortion vs. Frequency,
G = +1
Figure 24. AD8047 Short-Term Settling Time, G = +1
–25
–30
HARMONIC DISTORTION – dBc
–35
–40
–45
3RD HARMONIC
–50
–55
2ND HARMONIC
–60
–65
1.6
f = 20MHz
R
L
= 1kΩ
R
F
= 0Ω
0.25
0.20
0.15
0.10
R
L
= 100Ω
R
F
= 0Ω
V
OUT
= 2V STEP
ERROR – %
0.05
0.00
–0.05
–0.10
–0.15
–0.20
–0.25
2.5
3.5
4.5
OUTPUT SWING – V p-p
5.5
6.5
0
2
4
8
6
10
12
SETTLING TIME – µs
14
16
18
Figure 22. AD8047 Harmonic Distortion vs. Output Swing,
G = +1
Figure 25. AD8047 Long-Term Settling Time, G = +1
0.04
DIFF GAIN – %
17
0.02
0.00
–0.02
–0.04
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
10th 11th
INPUT NOISE VOLTAGE – nV/√Hz
15
13
11
9
7
5
3
DIFF PHASE – Degrees
0.04
0.02
0.00
–0.02
–0.04
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
10th 11th
10
100
1k
FREQUENCY – Hz
10k
100k
Figure 23. AD8047 Differential Gain and Phase Error,
G = +2, R
L
= 150
Ω
, R
F
= 200
Ω
, R
IN
= 200
Ω
Figure 26. AD8047 Noise vs. Frequency
REV. 0
–7–
AD [ ANALOG DEVICES ]
