Datasheet

ADA4939-1/ADA4939-2
Rev. 0 | Page 10 of 24
3
–12
–10
–8
–6
–4
–2
0
2
–11
–9
–7
–5
–3
–1
1
1 10 100 1k
NORMALIZED CLOSED-LOOP GAIN (dB)
FREQUENCY (MHz)
R
L
= 1kΩ
R
L
= 200Ω
07429-013
V
OUT, dm
= 100mV p-p
Figure 13. Small Signal Frequency Response for Various Loads
6
–9
–6
–3
3
0
1 10 100 1k
V
OCM
GAIN (dB)
FREQUENCY (MHz)
V
OCM
= 1.0V
V
OCM
= 3.9V
V
OCM
= 2.5V
07429-019
V
OUT, dm
= 100mV p-p
Figure 14. V
OCM
Small Signal Frequency Response at Various DC Levels
0.5
–0.5
–0.4
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
0.4
1 10 100 1k
NORMALIZED CLOSED-LOOP GAIN (dB)
FREQUENCY (MHz)
R
L
= 1kΩ
R
L
= 200Ω
R
L
= 1kΩ OUT1
R
L
= 1kΩ OUT2
R
L
= 200Ω OUT1
R
L
= 200Ω OUT2
07429-020
V
OUT, dm
= 100mV p-p
Figure 15. 0.1 dB Flatness Small Signal Response for Various Loads
3
–12
–10
–8
–6
–4
–2
0
2
–11
–9
–7
–5
–3
–1
1
1 10 100 1k
NORMALIZED CLOSED-LOOP GAIN (dB)
FREQUENCY (MHz)
R
L
= 1kΩ
R
L
= 200Ω
07429-016
V
OUT, dm
= 2V p-p
Figure 16. Large Signal Frequency Response for Various Loads
–55
–115
–110
–105
–100
–95
–90
–85
–80
–75
–70
–65
–60
1 10 100
HARMONIC DISTORTION (dBc)
FREQUENCY (MHz)
V
OUT, dm
= 2V p-p
HD2, G = 2
HD3, G = 2
HD2, G = 3.16
HD3, G = 3.16
HD2, G = 5
HD3, G = 5
07429-022
Figure 17. Harmonic Distortion vs. Frequency at Various Gains
–
60
–110
–105
–100
–95
–90
–85
–80
–75
–70
–65
1 10 100
HARMONIC DISTORTION (dBc)
FREQUENCY (MHz)
HD2, R
L, dm
= 1kΩ
HD3, R
L, dm
= 1kΩ
HD2, R
L, dm
= 200Ω
HD3, R
L, dm
= 200Ω
V
OUT, dm
= 2V p-p
V
S
= ±2.5V
07429-023
Figure 18. Harmonic Distortion vs. Frequency at Various Loads