Datasheet

AD8139
Rev. B | Page 10 of 24
3
–12
–10
–11
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
10 100 1000
FREQUENCY (MHz)
CLOSED-LOOP GAIN (dB)
V
O, dm
= 0.1V p-p
R
L
= 100Ω
R
L
= 200Ω
R
L
= 500Ω
R
L
= 1kΩ
0
4679-040
Figure 13. Small Signal Frequency Response for Various Loads
3
–12
–11
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
10 100 1000
FREQUENCY (MHz)
CLOSED-LOOP GAIN (dB)
V
O, dm
= 0.1V p-p
C
F
= 1pF
C
F
= 2pF
C
F
= 0pF
0
4679-011
Figure 14. Small Signal Frequency Response for Various C
F
6
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
4
5
10 100 1000
FREQUENCY (MHz)
CLOSED-LOOP GAIN (dB)
V
O, dm
= 0.1V p-p
V
OCM
= +4.3V
V
OCM
= +4V
V
OCM
= 0V
V
OCM
= –4V
V
OCM
= –4.3V
0
4679-012
Figure 15. Small Signal Frequency Response at Various V
OCM
–13
–12
–10
–11
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
10 100 1000
FREQUENCY (MHz)
CLOSED-LOOP GAIN (dB)
V
O, dm
= 2.0V p-p
R
L
= 100Ω
R
L
= 200Ω
R
L
= 500Ω
R
L
= 1kΩ
0
4679-041
Figure 16. Large Signal Frequency Response for Various Loads
2
–13
–11
–12
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
10 100 1000
FREQUENCY (MHz)
CLOSED-LOOP GAIN (dB)
V
O, dm
= 2.0V p-p
C
F
= 0pF
C
F
= 1pF
C
F
= 2pF
0
4679-014
Figure 17. Large Signal Frequency Response for Various C
F
–0.5
–0.4
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
0.4
0.5
1 10 100
04679-0-042
FREQUENCY (Hz)
NORMALIZED CLOSED-LOOP GAIN (dB)
R
L
= 1kΩ
(V
O, dm
= 0.1V p-p)
R
L
= 1kΩ
(V
O, dm
= 2.0V p-p)
R
L
= 100Ω
(V
O, dm
= 0.1V p-p)
R
L
= 100Ω
(V
O, dm
= 2.0V p-p)
Figure 18. 0.1 dB Flatness for Various Loads and Output Amplitudes