
Data Sheet
AD8120
Rev. A | Page 7 of 16
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, VS = ±5 V, RL = 150 , 10% to 90% input rise/fall time (tR/tF) = 4 ns, unless otherwise noted.
4
2
0
–2
–4
–6
–8
–10
–12
0.3
1
10
100
1k
FREQUENCY (MHz)
NO
RM
AL
IZ
E
D
G
AI
N
(
d
B)
07839-
010
DELAY CODE = 63
DELAY CODE = 33
DELAY CODE = 1
DELAY CODE = 2
Figure 4. Small-Signal Frequency Response for Various Delay Settings,
VOUT = 0.2 V p-p
0.25
0.20
0.15
0.10
0.05
0
–0.05
–20
0
20
40
60
80
100
120
TIME (ns)
A
MPL
IT
U
D
E
(V)
07839-
012
DELAY CODE = 63
DELAY CODE = 33
DELAY CODE = 0
INPUT
VS = ±5V
LOAD = 150
Figure 5. Small-Signal Pulse Response for Various Delay Settings
50
45
40
35
30
25
20
15
10
5
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
1
12
22
33
44
55
62
ANALOG CONTROL VOLTAGE (V)
DELAY CODE
R
EL
A
T
IVE
D
EL
A
Y
(n
s
)
07839-
021
Figure 6. Relative Delay vs. Delay Code and Analog Control Voltage
4
6
2
0
–2
–4
–6
–8
–10
–12
0.3
1
10
100
1k
FREQUENCY (MHz)
NO
RM
AL
IZ
E
D
G
AI
N
(
d
B)
07839-
011
DELAY CODE = 63
DELAY CODE = 33
DELAY CODE = 1
DELAY CODE = 2
Figure 7. Video Signal Frequency Response for Various Delay Settings,
VOUT = 1.4 V p-p
1.8
0.8
1.0
1.2
1.4
1.6
0.6
0.4
0.2
0
–0.2
–20
0
20
40
60
80
100
120
TIME (ns)
A
MPL
IT
U
D
E
(V)
07839-
013
DELAY CODE = 63
DELAY CODE = 33
VS = ±5V, LOAD = 150
DELAY CODE = 0
INPUT
Figure 8. Large-Signal Pulse Response for Various Delay Settings
120
110
100
90
80
70
60
50
40
0
4
8
12 16 20 24 28 32 36 40 44 48 52 56 60 64
DELAY CODE
Q
UI
E
S
CE
NT
CURRE
NT
(
mA)
07839-
018
TWO CHANNELS
ONE CHANNEL
THREE CHANNELS
Figure 9. Quiescent Current vs. Delay Code