AD8047/AD8048
–20
–30
HARMONIC DISTORTION – dBc
0.5
R
L
= 100Ω
V
OUT
= 2V p-p
0.4
0.3
0.2
R
L
= 100Ω
R
F
= 200Ω
V
OUT
= 2V STEP
–40
–50
–60
–70
–80
–90
–100
–110
–120
10k
100k
1M
FREQUENCY – Hz
10M
100M
3RD HARMONIC
2ND HARMONIC
ERROR – %
0.1
0.0
–0.1
–0.2
–0.3
–0.4
–0.5
0
5
10
15
20
25
30
35
40
45
SETTLING TIME – ns
Figure 33. AD8048 Harmonic Distortion vs. Frequency,
G = +2
–15
–20
HARMONIC DISTORTION – dBc
Figure 36. AD8048 Short-Term Settling Time, G = +2
0.25
f = 20MHz
R
L
= 1kΩ
R
F
= 200
0.20
3RD HARMONIC
–25
–30
–35
–40
–45
–50
–55
–60
–65
–70
1.5
0.15
0.10
ERROR – %
R
L
= 100Ω
R
F
= 200Ω
V
OUT
= 2V STEP
0.05
0.0
–0.05
–0.10
–0.15
–0.20
2ND HARMONIC
2.5
3.5
4.5
OUTPUT SWING – Volts p-p
5.5
6.5
–0.25
0
2
4
8
6
10
12
SETTLING TIME – µs
14
16
18
Figure 34. AD8048 Harmonic Distortion vs. Output Swing,
G = +2
Figure 37. AD8048 Long-Term Settling Time 2 V Step,
G = +2
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
10
100
1k
FREQUENCY – Hz
10k
100k
DIFF PHASE – Degrees
0.04
0.02
0.00
–0.02
–0.04
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
10th 11th
Figure 35. AD8048 Differential Gain and Phase Error,
G = +2, R
L
= 150
Ω
, R
F
= 200
Ω
, R
IN
= 200
Ω
Figure 38. AD8048 Noise vs. Frequency
REV. 0
–9–
AD [ ANALOG DEVICES ]
