Datasheet

9
LT1193
1193fb
Small-Signal Transient Response
Closed-Loop Voltage Gain vs Frequency
FREQUENCY (Hz)
CLOSED-LOOP VOLTAGE GAIN (dB)
10
LT1193 • TA08
100M10M1M100k
8
6
0
2
4
C
FB
= 0pF
C
FB
= 5pF
C
FB
= 10pF
C
FB
= 15pF
V
S
= ±5V
T
A
= 25°C
A
V
= 2
R
FB
= 300Ω
R
G
= 300Ω
Closed-Loop Voltage Gain vs Frequency
FREQUENCY (Hz)
CLOSED-LOOP VOLTAGE GAIN (dB)
25
LT1193 • TA07
100M10M1M100k
V
S
= ±5V
T
A
= 25°C
A
V
= 10
15
5
–5
A
V
= 5
A
V
= 3
A
V
= 2
Small-Signal Transient Response
APPLICATIO S I FOR ATIO
WUUU
LT1193 • TA09
A
V
= 2, OVERSHOOT = 40%, R
FB
= 1k, R
G
= 1k
LT1193 • TA10
A
V
= 2 WITH 8pF FEEDBACK CAPACITOR
RISE TIME = 3.75ns, R
FB
= 1k, R
G
= 1k
100Ω, while operating on ±5V supplies and gains >3. On
a single 5V supply, the LT1193 can swing 2.6V
P-P
for
gains ≥2.
FREQUENCY (Hz)
CLOSED LOOP VOLTAGE GAIN (dB)
8
LT1193 • TA11
100M10M1M100k
6
4
0
2
–2
–4
–6
A
V
= 2
R
FB
= 300Ω
R
G
= 100Ω
C
FB
= 0pF
A
V
= 1
R
FB
= 300Ω
R
G
= 300Ω
C
FB
= 10pF
+
–
–
+
R
FB
5V
7
6
LT1193
–5V
4
3
1
2
8
R
G
75Ω
75Ω
C ABL E
C
FB
Closed-Loop Voltage Gain vs Frequency
Double Terminated Cable Driver
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