Datasheet

ADA4851-1/ADA4851-2/ADA4851-4
Rev. J | Page 12 of 24
5.4
6.2
0.1 100
CLOSED-LOOP GAIN (dB)
05143-021
FREQUENCY (MHz)
110
6.1
6.0
5.9
5.8
5.7
5.6
5.5
V
S
= ±5V
G = +2
R
L
= 150Ω
R
F
= 1kΩ
V
OUT
= 100mV p-p
V
OUT
= 1V p-p
V
OUT
= 2V p-p
Figure 12. 0.1 dB Flatness Response for Various Output Amplitudes
–6
–5
–4
–3
–2
–1
0
1
CLOSED-LOOP GAIN (dB)
1 10010 300
05143-015
V
S
= ±5V
G = +1
V
OUT
= 1V p-p
R
L
= 1kΩ
R
L
= 150Ω
FREQUENCY (MHz)
Figure 13. Large Frequency Response for Various Loads
–20
0
20
40
60
80
100
120
OPEN-LOOP GAIN (dB)
OPEN-LOOP PHASE (Degrees)
100k10k100 1k10 1M 10M 100M 1G
FREQUENCY (Hz)
05143-029
PHASE
GAIN
V
S
= ±5V
140
–240
–210
–180
–150
–120
–90
–60
–30
0
Figure 14. Open-Loop Gain and Phase vs. Frequency
–110
–
40
0.1 10
HARMONIC DISTORTION (dBc)
05143-014
FREQUENCY (MHz)
1
–50
–60
–70
–80
–90
–100
G = –1
V
S
= 3V
R
L
= 150Ω
V
OUT
= 2V
HD3
HD2
Figure 15. Harmonic Distortion vs. Frequency
–120
–110
–100
–90
–80
–70
–60
–
50
HARMONIC DISTORTION (dBc)
012345678910
OUTPUT AMPLITUDE (V p-p)
05143-017
G = +2
V
S
= ±5V
R
L
= 1kΩ
f = 2MHz
HD2
HD3
Figure 16. Harmonic Distortion vs. Output Amplitude
0.1 10
HARMONIC DISTORTION (dBc)
05143-016
FREQUENCY (MHz)
1
–
40
–50
–60
–70
–80
–90
–100
–110
R
L
= 1kΩ HD2
R
L
= 150Ω HD2
R
L
= 1kΩ HD3
R
L
= 150Ω HD3
G = +1
V
OUT
= 2V p-p
V
S
=±5V
Figure 17. Harmonic Distortion vs. Frequency for Various Loads