APPLICATIO S I FOR ATIO
Closed-Loop Voltage Gain vs Frequency
25
AV = 10
VS = ±5V
TA = 25°C
15 AV = 5
AV = 3
AV = 2
5
LT1193
Small-Signal Transient Response
–5
100k
1M
10M
FREQUENCY (Hz)
100M
LT1193 • TA07
Closed-Loop Voltage Gain vs Frequency
10
VS = ±5V
TA = 25°C
8 AV = 2
RFB = 300Ω
RG = 300Ω
6
4
CFB = 0pF
CFB = 5pF
CFB = 10pF
CFB = 15pF
AV = 2 WITH 8pF FEEDBACK CAPACITOR
RISE TIME = 3.75ns, RFB = 1k, RG = 1k
LT1193 • TA10
Double Terminated Cable Driver
3+
2–
5V
7
1 +LT1193
6
8– 4
–5V
RG
RFB
75Ω CABLE
75Ω
CFB
2
0
100k
1M
10M
FREQUENCY (Hz)
100M
LT1193 • TA08
Small-Signal Transient Response
LT1193 • TA09
AV = 2, OVERSHOOT = 40%, RFB = 1k, RG = 1k
100Ω, while operating on ±5V supplies and gains > 3. On
a single 5V supply, the LT1193 can swing 2.6VP-P for
gains ≥ 2.
Closed-Loop Voltage Gain vs Frequency
8
6
AV = 2
4
RFB = 300Ω
RG = 100Ω
2
CFB = 0pF
0
AV = 1
–2
RFB = 300Ω
RG = 300Ω
CFB = 10pF
–4
–6
100k
1M
10M
100M
FREQUENCY (Hz)
LT1193 • TA11
When driving a cable it is important to terminate the cable
to avoid unwanted reflections. This can be done in one of
two ways: single termination or double termination. With
single termination, the cable must be terminated at the
receiving end (75Ω to ground) to absorb unwanted en-
ergy. The best performance can be obtained by double
termination (75Ω in series with the output of the amplifier,
and 75Ω to ground at the other end of the cable). This
1193fb
9