
AD8143
Rev. 0 | Page 12 of 24
5
–5
1
1000
05538-013
FREQUENCY (MHz)
GAIN
(
d
B)
10
100
4
3
2
1
0
–1
–2
–3
–4
RL = 1kΩ
VOUT = 0.2V p-p
G = 1, CL = 2pF
G = 1, CL = 10pF, RSNUB = 40Ω
G = 2, CL = 2pF
G = 2, CL = 10pF, RSNUB = 40Ω
Figure 10. Small Signal Frequency Response at Various Gains and 10 pF
Capacitive Load Buffered by 40 Ω Resistor
3
–7
1
10
100
05538-009
FREQUENCY (MHz)
GAIN
(
d
B)
2
1
0
–1
–2
–3
–4
–5
–6
VOUT = 0.2V p-p
G = 1
G = 2
Figure 11. Small Signal Frequency Response at Various Gains
0.5
–0.5
1
100
05538-010
FREQUENCY (MHz)
GAIN
(dB)
10
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
RL = 150Ω, VOUT = 0.2V p-p
RL = 150Ω, VOUT = 2V p-p
RL = 1kΩ, VOUT = 0.2V p-p
RL = 1kΩ, VOUT = 2V p-p
Figure 12. 0.1 dB Flatness for Various Loads and Output Amplitudes
5
–5
1
1000
05538-014
FREQUENCY (MHz)
GAIN
(
d
B)
10
100
4
3
2
1
0
–1
–2
–3
–4
G = 1, CL = 2pF
G = 1, CL = 10pF, RSNUB = 40Ω
G = 2, CL = 2pF
G = 2, CL = 10pF, RSNUB = 40Ω
RL = 1kΩ
VOUT = 2V p-p
Figure 13. Large Signal Frequency Response at Various Gains and 10 pF
Capacitive Load Buffered by 40 Ω Resistor
3
–7
1
10
100
05538-012
FREQUENCY (MHz)
GAIN
(
d
B)
2
1
0
–1
–2
–3
–4
–5
–6
G = 1
G = 2
VOUT = 2V p-p
Figure 14. Large Signal Frequency Response at Various Gains
80
–10
0.001
1000
05538-016
FREQUENCY (MHz)
OP
E
N
LOOP
-GAIN
(dB)
0.01
0.1
1
10
100
70
50
60
40
30
20
10
0
–180
OPEN
LOOP-
PH
A
SE
(
D
egrees)
–20
–60
–40
–80
–100
–120
–140
–160
MAGNITUDE
PHASE
Figure 15. Open-Loop Gain and Phase Responses