LT1187
Low Power
Video Difference Amplifier
FEATURES
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Differential or Single-Ended Gain Block (Adjustable)
鈥?dB Bandwidth, A
V
=
鹵2
50MHz
Slew Rate
165V/碌s
Low Supply Current
13mA
Output Current
鹵
20mA
CMRR at 10MHz
40dB
LT1193 Pin Compatible
Low Cost
Single 5V Operation
Drives Cables Directly
Output Shutdown
The LT1187 is a difference amplifier optimized for opera-
tion on
鹵5V,
or a single 5V supply, and gain
鈮?.
This
versatile amplifier features uncommitted high input im-
pedance (+) and (鈥? inputs, and can be used in differential
or single-ended configurations. Additionally, a second set
of inputs give gain adjustment and DC control to the
difference amplifier.
The LT1187鈥檚 high slew rate, 165V/碌s, wide bandwidth,
50MHz, and
鹵20mA
output current require only 13mA of
supply current. The shutdown feature reduces the power
dissipation to a mere 15mW, and allows multiple amplifi-
ers to drive the same cable.
The LT1187 is a low power version of the popular LT1193,
and is available in 8-pin miniDIPs and SO packages. For
applications with gains of 10 or more, see the LT1189
data sheet.
APPLICATI
s
s
s
s
S
Line Receivers
Video Signal Processing
Cable Drivers
Tape and Disc Drive Systems
TYPICAL APPLICATI
Cable Sense Amplifier for Loop Through Connections
with DC Adjust
40
V
IN
5V
CABLE
V
DC
2
1
8
+
鈥?/div>
LT1187
+
鈥?/div>
4
鈥?V
1k
7
6
V
OUT
Closed-Loop Gain vs Frequency
30
VOLTAGE GAIN (dB)
3
20
10
0
1k
LT1187 鈥?TA01
鈥?0
0.1
U
V
S
= 鹵5V
R
L
= 1k
1
10
FREQUENCY (MHz)
100
LT1187 鈥?TA02
UO
UO
1
next