AD8021
Rev. F | Page 11 of 28
FREQUENCY (Hz)
1M
GA
IN
(
d
B
)
10M
100M
6.2
6.0
5.8
5.6
5.4
6.4
G = +2
VS = ±12V
VS = ±2.5V
01
88
8-
0
17
VS = ±5V
Figure 17. 0.1 dB Flatness vs. Frequency and Supply, VOUT = 1 V p-p,
FREQUENCY (Hz)
0.1M
DISTORTION
(
d
Bc)
1M
–40
–60
–90
–110
–130
–20
–30
–50
–70
–80
–100
–120
10M
20M
THIRD
SECOND
RL = 100Ω
RL = 1kΩ
01888-018
Figure 18. Second and Third Harmonic Distortion vs. Frequency and RL
FREQUENCY (Hz)
100k
DISTORTION
(
d
Bc)
1M
20M
–40
–60
–90
–110
–130
–30
–50
–70
–80
–100
–120
10M
THIRD
SECOND
THIRD
VS = ±2.5V
VS = ±5V
VS = ±12V
01888-019
Figure 19. Second and Third Harmonic Distortion vs. Frequency and VS
FREQUENCY (MHz)
9.5
P
OUT
(dBm)
10.5
–40
–60
–90
–110
–30
–50
–70
–80
–100
–120
–20
9.7
10.3
10.0
Δf = 0.2MHz
f1
f2
976
Ω
53.6
Ω
50
Ω
POUT
01888-020
Figure 20. Intermodulation Distortion vs. Frequency
FREQUENCY (MHz)
0
THIRD-ORDE
R
INTE
RCE
P
T
(dBm)
10
20
45
30
25
40
35
20
50
VS = ±5V
VS = ±2.5V
515
01888-021
Figure 21. Third-Order Intercept vs. Frequency and Supply Voltage
1
DISTORTION
(
d
Bc)
–60
–90
–100
–70
–80
–120
–50
–110
THIRD
SECOND
THIRD
VOUT (V p-p)
23
4
5
6
RL = 100Ω
RL = 1kΩ
01888-022
Figure 22. Second and Third Harmonic Distortion vs. VOUT and RL