AD8042
Rev. E | Page 8 of 16
30
300
100
10
3
1
10 1G100M10M1M100k10k1k100
INPUT VOLTAGE NOISE (nV/ Hz)
FREQUENCY (Hz)
01059-011
Figure 11. Input Voltage Noise vs. Frequency
–60
–40
30
–50
–70
–100
–80
–90
11
098765432
TOTAL HARMONIC DISTORTION (dBc)
FUNDAMENTAL FREQUENCY (MHz)
01059-012
V
S
= 3V, A
V
= –1,
R
L
= 100Ω TO 1.5V
V
S
= 5V, A
V
= +2,
R
L
= 100Ω TO 2.5V
V
S
= 5V, A
V
= +1,
R
L
= 100Ω TO 2.5V
V
S
= 5V, A
V
= +2,
R
L
= 1kΩ TO 2.5V
V
S
= 5V, A
V
= +1,
R
L
= 1kΩ TO 2.5V
Figure 12. Total Harmonic Distortion vs. Frequency
–60
–40
30
–50
–70
–110
–100
–80
–90
05
.04.54.03.53.02.52.01.51.00.5
WORST HARMONIC (dBc)
OUTPUT VOLTAGE (V p-p)
01059-013
10MHz
5MHz
1MHz
V
S
= 5V, G = +2,
R
L
= 1kΩ TO 2.5V
Figure 13. Worst Harmonic vs. Output Voltage
0.01
0.03
0.04
0.02
–0.01
0.05
0
–0.01
0.04
0.03
0.02
0.01
0
0 100908070605040302010
DIFFERENTIAL
PHASE ERROR (Degrees)
DIFFERENTIAL
GAIN ERROR (%)
MODULATING RAMP LEVEL (IRE)
01059-014
NTSC SUBCARRIER (3.579MHz)
V
S
= +5V
G = +2
R
L
= 150Ω TO 2.5V
V
S
= ±5V
G = +2
R
L
= 150Ω
V
S
= ±5V
G = +2
R
L
= 150Ω
V
S
= +5V
G = +2
R
L
= 150Ω TO 2.5V
Figure 14. Differential Gain and Phase Errors
0.6
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
1 50010010
NORMALIZED GAIN (dB)
FREQUENCY (MHz)
01059-015
V
S
= 5V
G = +2
R
F
= 200Ω
R
L
= 150Ω TO 2.5V
14MHz
Figure 15. 0.1 dB Gain Flatness
PHASE (Degrees)
120
100
80
60
40
20
0
–20
–40
–60
–80
45
0
–45
–90
–135
–180
–225
–270
0.01 50010 10010.1
OPEN-LOOP GAIN (dB)
FREQUENCY (MHz)
01059-016
V
S
= 5V
G = +2
R
F
= 200Ω
R
L
= 150Ω TO 2.5V
GAIN
PHASE
Figure 16. Open-Loop Gain and Phase vs. Frequency