LT1187_15 Datasheet, PDF (1/16 Pages) Linear Technology – Low Power Video Difference Amplifi er

LT1187
Low Power
Video Difference Amplifier
FEATURES
■ _{Differential or Single-Ended Gain Block (Adjustable)}
■ _{–3dB Bandwidth, AV = ±2: 50MHz}
■ _{Slew Rate: 165V/µs}
■ _{Low Supply Current: 13mA}
■ _{Output Current: ±20mA}
■ _{CMRR at 10MHz: 40dB}
■ _{LT1193 Pin Compatible}
■ _{Low Cost}
■ _{Single 5V Operation}
■ _{Drives Cables Directly}
■ _{Output Shutdown}
■ _{Available in 8-Lead PDIP and SO Packages}
APPLICATIONS
■ _{Line Receivers}
■ _{Video Signal Processing}
■ _{Cable Drivers}
■ _{Tape and Disc Drive Systems}
DESCRIPTION
The LT^®1187 is a difference amplifier optimized for op-
eration on ±5V, or a single 5V supply and gain ≥2. This
versatile amplifier features uncommitted high input imped-
ance (+) and (–) 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’s high slew rate, 165V/ms, wide bandwidth,
50MHz, and ±20mA output current require only 13mA of
supply current. The shutdown feature reduces the power
dissipation to a mere 15mW and allows multiple amplifiers
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.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Cable Sense Amplfier for Loop Through Connections with DC Adjust
V_IN
CABLE
V_DC
5V
3₊
2_–
7
6
1
LT1187
+
8_{– 4}
–5V
1k
V_OUT
1k
LT1187 • TA01
Closed-Loop Gain vs Frequency
40
V_S = ±5V
R_L = 1k
30
20
10
0
–10
0.1
1
10
FREQUENCY (MHz)
100
LT1187 • TA02
1187fa
1