Datasheet

AD8128
Rev. 0 | Page 6 of 12
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, V
S
= ±5 V, R
L
= 150 Ω, Belden Cable, V
OFFSET
= 0 V, unless otherwise noted.
1.0
0
0 100
05699-003
CABLE LENGTH (M)
OPTIMIZED V
PEAK
AND V
GAIN
(V)
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
10 20 30 40 50 60 70 80 90
V
OUT
=2Vp-p
R
L
= 150
V
PEAK
V
GAIN
Figure 4. V
PEAK
and V
GAIN
Settings vs. Cable Length
10
20
30
–70
05699-014
FREQUENCY (MHz)
MAGNITUDE (dB)
0
–10
–20
–30
–40
–50
–60
0.1
1 10 100 1k 3k
V
PEAK
=1V
V
PEAK
=0.5V
V
PEAK
=0V
Figure 5. Frequency Response for Various V
PEAK
Settings Without Cable
10
–70
05699-013
FREQUENCY (MHz)
MAGNITUDE (dB)
0
–10
–20
–30
–40
–50
–60
0.1
1 10 100 1k 3k
V
GAIN
=1V
V
GAIN
=0.5V
V
GAIN
=0V
Figure 6. Frequency Response for Various V
GAIN
Settings Without Cable
2
–10
0.1
05699-012
FREQUENCY (MHz)
MAGNITUDE (dB)
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
1 10 100 300
V
PEAK
AND V
GAIN
SETTINGS ARE CONSISTENT
WITH OPTIMIZED SETTINGS IN FIGURE 4
V
OUT
=2Vp-p
R
L
= 150
Figure 7. Equalized Frequency Response for 50 M Cable
2
–10
0.1
05699-011
FREQUENCY (MHz)
MAGNITUDE (dB)
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
1 10 100 300
V
PEAK
AND V
GAIN
SETTINGS ARE CONSISTENT
WITH OPTIMIZED SETTINGS IN FIGURE 4
V
OUT
=2Vp-p
R
L
= 150
Figure 8. Equalized Frequency Response for 100 M Cable
1.5
–1.5
0 200
05699-010
TIME (ns)
OUTPUT (V)
1.0
0.5
0
–0.5
–1.0
20 40 60 80 100 120 140 160 180
V
PEAK
AND V
GAIN
SETTINGS ARE
CONSISTENT WITH OPTIMIZED
SETTINGS IN FIGURE 4
Figure 9. Equalized Pulse Response for 50 M of Cable