Datasheet

AD8027/AD8028
Rev. C | Page 10 of 24
FREQUENCY (MHz)
0.1 1 10 100 1000
CLOSED-LOOP GAI (dB)
G = +1
V
OUT
= 200mV p-p
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
4
V
ICM
= V
S+
– 0.2V
SELECT = HIGH
V
ICM
= 0V
SELECT = HIGH OR TRI
V
ICM
= V
S–
+ 0.2V
SELECT = TRI
V
ICM
= V
S+
– 0.3V
SELECT = HIGH
V
ICM
= V
S–
+ 0.3V
SELECT = TRI
03327-A-015
Figure 16. Small Signal Frequency Response vs.
Input Common-Mode Voltages
FREQUENCY (MHz)
0.001 0.01 0.1 1 10 100 1000
–130
–140
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
CROSSTALK (dB)
03327-A-016
G = +1
V
S
= 5V
R
L
= 1kΩ
A TO B
B TO A
CROSSTALK = 20log (V
OUT
/V
IN
)
1/2
AD8028
+
U1
R3
1kΩ
R2
50Ω
R1
50Ω
V1
VI
–
1/2
AD8028
+
U2
V
OUT
–
Figure 17. AD8028 Crosstalk Output to Output
FREQUENCY (Hz)
OPEN-LOOP GAIN (dB)
PHASE (Degrees)
10 100 1k 10k 100k 1M 10M 100M 1G
–25
–5
15
35
55
75
95
115
135
–10
0
10
20
30
40
50
60
70
80
90
100
110
GAIN
PHASE
03327-A-017
Figure 18. Open-Loop Gain and Phase vs. Frequency
1
10 100 1k 10k 100k
FREQUENCY (Hz)
1M 10M 100M 1G
10
100
CURRENT NOISE (pA/ Hz)
1
10
100
VOLTAGE NOISE (nV/ Hz)
VOLTAGE
CURRENT
03327-A-018
Figure 19. Voltage and Current Noise vs. Frequency
100
FREQUENCY (MHz)
0.1 1 10 1000
5.9
6.0
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
CLOSED-LOOP GAIN (dB)
G = +2
R
L
= 150 Ω
V
OUT
= 2V p-p
V
OUT
= 200mV p-p
03327-A-019
Figure 20. 0.1 dB Flatness Frequency Response
FREQUENCY (MHz)
0.1 1 2010
DISTORTION (dB)
–140
–120
–100
–80
–60
–40
–20
G = +1
V
OUT
= 2V p-p
R
L
= 1k Ω
SECOND HARMONIC: SOLID LINE
THIRD HARMONIC: DASHED LINE
V
S
= +3V
V
S
= +5V
V
S
= ± 5V
03327-A-020
Figure 21. Harmonic Distortion vs. Frequency and Supply Voltage