Datasheet

Data Sheet ADA4937-1/ADA4937-2
Rev. D | Page 11 of 28
3
–12
–9
–6
–3
0
1 10 100 1000
V
OCM
CLOSED-LOOP GAIN (dB)
FREQUENCY (MHz)
V
OCM
= 1.0V
V
OCM
= 2.5V
V
OCM
= 3.9V
06591-019
Figure 19. Small Signal Frequency Response
for Various V
OCM
GAIN (dB)
FREQUENCY (MHz)
06591-020
–0.5
–0.4
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1 10 100 1000
R
L
= 1kΩ, ADA4937-1
R
L
= 100Ω, ADA4937-1
R
L
= 1kΩ, ADA4937-2
R
L
= 100Ω, ADA4937-2
Figure 20. 0.1 dB Flatness Response for Various Loads
–55
–60
–65
–70
–75
–80
–85
–90
–95
–100
–105
–110
–115
1 10 100
DISTORTION (dBc)
FREQUENCY (MHz)
HD2, V
S
= 5.0V
HD3, V
S
= 5.0V
HD2, V
S
= 3.3V
HD3, V
S
= 3.3V
06591-021
Figure 21. Harmonic Distortion vs. Frequency and Supply Voltage
–50
–60
–70
–80
–90
–100
–110
–120
1 10 100
DISTORTION (dBc)
FREQUENCY (MHz)
HD2, G = +1, R
F
= 200Ω
HD3, G = +1, R
F
= 200Ω
HD2, G = +2, R
F
= 402Ω
HD3, G = +2, R
F
= 402Ω
06591-022
Figure 22. Harmonic Distortion vs. Frequency and Gain
–50
–60
–70
–80
–90
–100
–110
–120
1 10 100
DISTORTION (dBc)
FREQUENCY (MHz)
HD2, R
L
= 1kΩ
HD3, R
L
= 1kΩ
HD2, R
L
= 200Ω
HD3, R
L
= 200Ω
06591-023
Figure 23. Harmonic Distortion vs. Frequency and Load
–50
–60
–70
–80
–90
–100
–110
–130
–120
–1 76543210
DISTORTION (dBc)
V
OUT
(V)
HD2, V
S
= 3.3V
HD3, V
S
= 3.3V
HD2, V
S
= 5.0V
HD3, V
S
= 5.0V
06591-024
Figure 24. Harmonic Distortion vs. V
OUT
and Supply Voltage