Datasheet

AD8123
Rev. A | Page 7 of 16
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, V
S
= ±5 V, R
L
= 150 Ω, Belden Cable (BL-7987R), V
OFFSET
= 0 V, V
PEAK
, V
GAIN
, and V
POLE
are set to recommended settings shown in
Figure 17, unless otherwise noted.
–6
–5
–4
–3
–2
–1
0
1
2
3
4
100k 1M 10M 100M
V
GAIN
= 0V
V
GAIN
= 1V
V
GAIN
= 2V
V
GAIN
= 0V
V
POLE
= 0V
V
O
= 1V p-p
06814-003
FREQUENCY (Hz)
GAIN (dB)
Figure 5. Frequency Response for Various V
GAIN
Without Cable
–60
–40
–20
0
20
40
60
V
PEAK
= 0V
V
PEAK
= 1V
V
PEAK
= 2V
100k 1M 10M 100M
06814-004
FREQUENCY (Hz)
GAIN (dB)
V
GAIN
= 0.6V
V
POLE
= 2V
V
O
= 1V p-p
Figure 6. Frequency Response for Various V
PEAK
Without Cable
–60
–50
–40
–30
–20
–10
0
10
20
30
40
V
POLE
= 0V
V
POLE
= 1V
V
POLE
= 2V
100k 1M 10M 100M
06814-005
FREQUENCY (Hz)
GAIN (dB)
V
GAIN
= 0.6V
V
PEAK
= 1V
V
O
= 1V p-p
Figure 7. Frequency Response for Various V
POLE
Without Cable
–12
–9
–10
–11
–6
–3
–4
–5
–7
–8
–2
–1
0
1
2
3
50m
100m
150m
200m
300m
V
O
= 2V p-p
100k 1M 10M 100M
06814-006
FREQUENCY (Hz)
GAIN (dB)
Figure 8. Equalized Frequency Response for Various Cable Lengths
0
20
40
60
80
100
120
0 50 100 150 200 250 300
06814-007
CABLE LENGTH (meters)
BANDWIDTH (MHz)
V
O
= 2V p-p
Figure 9. Equalized −3 dB Bandwidth vs. Cable Length
–6
–4
–2
0
2
4
6
0 50 100 150 200 250 300 350 400 450 500
06814-008
TIME (ns)
VOLTAGE (V)
V
GAIN
= 0.6V
V
PEAK
= 0V
V
POLE
= 0V
INPUT
OUTPUT
Figure 10. Overdrive Recovery