LT1193CN8 Linear Technology, LT1193CN8 Datasheet - Page 10

• Manufacturer Part Number: LT1193CN8
• Description: IC AMP VIDEO DIF ADJ GAIN 8-DIP
• Manufacturer: Linear Technology

Specifications of LT1193CN8

• Applications: Differential
• Number Of Circuits: 1
• -3db Bandwidth: 80MHz
• Slew Rate: 500 V/µs
• Current - Supply: 35mA
• Current - Output / Channel: 50mA
• Voltage - Supply, Single/dual (±): 4.75 V ~ 16 V, ±2.38 V ~ 8 V
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

APPLICATIO S I FOR ATIO
LT1193
termination is preferred because reflected energy is ab-
sorbed at each end of the cable. When using the double
termination technique it is important to note that the signal
is attenuated by a factor of 2, or 6dB. The cable driver has
a – 3dB bandwidth of 80MHz while driving a 150 load.
Using the Shutdown Feature
The LT1193 has a unique feature that allows the amplifier
to be shut down for conserving power or for multiplexing
several amplifiers onto a common cable. The amplifier will
shut down by taking Pin 5 to V
dissipates 15mW while maintaining a true high impedance
output state of 15k in parallel with the feedback resis-
tors. The amplifiers may be connected inverting, nonin-
verting or differential for MUX applications. When the
output is loaded with as little as 1k from the amplifier’s
feedback resistors, the amplifier shuts off in 200ns. This
shutoff can be under the control of HC CMOS operating
between 0V and – 5V.
The ability to maintain shutoff is shown on the curve
Shutdown Supply Current vs Temperature in the Typical
Performance Characteristics section. At very high el-
evated temperatures it is important to hold the SHDN pin
close to the negative supply to keep the supply current
from increasing.
Murphy Circuits
There are several precautions the user should take when
using the LT1193 in order to realize its full capability.
Although the LT1193 can drive a 30pF in gains as low as 2,
10
t
t
OFF
ON
= 300ns
= 200ns
SHUTDOWN PIN, A
1MHz SINE WAVE GATED OFF WITH
U
Output Shutdown
U
V
= 3, R
–
. In shutdown, the amplifier
FB
= 1k, R
W
G
= 500
LT1193 • TA12
U
isolating the capacitance with 10 can be helpful. Precau-
tions primarily have to do with driving large
capacitive loads.
Other precautions include:
1. Use a ground plane (see Design Note 50, High Fre-
2. Do not use high source impedances. The input capaci-
3. PC board socket may reduce stability.
4. A feedback resistor of 1k or lower reduces the effects of
quency Amplifier Evaluation Board).
tance of 2pF, and R
8MHz – 3dB bandwidth.
stray capacitance at the inverting input. (For instance,
closed-loop gain of
R
G
= 300 .)
A
V
= 2, IN DEMO BOARD, C
A
Driving Capacitive Load
Driving Capacitive Load
WITH 10 ISOLATING RESISTOR
V
= 2, IN DEMO BOARD, C
S
= 10k for instance, will give an
2 can use R
L
= 30pF, R
L
= 30pF
FB
= 1k, R
FB
G
= 1k
LT1193 • TA14
LT1193 • TA15
= 300
1193fb
and