AD8138
–60
V
S
= 5V
R
L
= 800
HD3(F = 20MHz)
–60
V
S
= +5V
R
L
= 800
HD2(F = 20MHz)
DISTORTION – dBc
–60
V
S
= +3V
R
L
= 800
–70
DISTORTION – dBc
–70
–70
HD2(F = 20MHz)
HD3(F = 20MHz)
HD2(F = 20MHz)
DISTORTION – dBc
–80
–90
HD2(F = 5MHz)
–100
HD3(F = 5MHz)
–110
–120
–80
–90
HD3(F = 20MHz)
–80
HD2(F = 5MHz)
–100
HD3(F = 5MHz)
–110
–120
–90
HD2(F = 5MHz)
–100
HD3(F = 5MHz)
0
1
2
3
4
5
6
0
1
2
3
4
–110
0.25
0.50
0.75
1.00
1.25
1.50
1.75
DIFFERENTIAL OUTPUT VOLTAGE – V p-p
DIFFERENTIAL OUTPUT VOLTAGE – V p-p
DIFFERENTIAL OUTPUT VOLTAGE – V p-p
Figure 11. Harmonic Distortion vs.
Differential Output Voltage
Figure 12. Harmonic Distortion vs.
Differential Output Voltage
Figure 13. Harmonic Distortion vs.
Differential Output Voltage
–60
V
S
= +5V
V
OUT,dm
= 2V p-p
–70
HD2(F = 20MHz)
–80
HD3(F = 20MHz)
–90
HD2(F = 5MHz)
–100
HD3(F = 5MHz)
–110
200
–60
–70
V
S
= 5V
V
OUT,dm
= 2V p-p
HD2(F = 20MHz)
10
F
C
= 50MHz
V
S
= 5V
–10
HD3(F = 20MHz)
P
OUT
– dBm
DISTORTION – dBc
DISTORTION – dBc
–80
–90
–30
–50
HD2(F = 5MHz)
–100
HD3(F = 5MHz)
–110
–120
200
–70
–90
–110
49.5
600
1000
R
LOAD
–
1400
1800
600
1000
1400
R
LOAD
–
1800
49.7
49.9
50.1
50.3
FREQUENCY – MHz
50.5
Figure 14. Harmonic Distortion vs.
R
LOAD
Figure 15. Harmonic Distortion vs.
R
LOAD
Figure 16. Intermodulation
Distortion
45
R
L
= 800
V
S
=
5V
C
F
= 0pF
V
OUT,dm
= 0.2V p-p
V
S
= 5V
V
OUT,dm
40
INTERCEPT – dBm
V
OUT–
C
F
= 1pF
V
S
= +5V
35
V
OUT+
V
S
=
30
5V
V
+DIN
25
0
20
40
60
FREQUENCY – MHz
80
1V
5ns
40mV
5ns
Figure 17. Third Order Intercept vs.
Frequency
Figure 18. Large Signal Transient
Response
Figure 19. Small Signal Transient
Response
–6–
REV. A
AD [ ANALOG DEVICES ]
