LT1189_15 Datasheet, PDF (1/12 Pages) Linear Technology – Low Power Video Difference Amplifier

LT1189
Low Power
Video Difference Amplifier
FEATURES
s _{Differential or Single-Ended Gain Block (Adjustable)}
s _{–3dB Bandwidth, AV = ± 10}
s _{Slew Rate}
35MHz
220V/µs
s _{Low Supply Current}
13mA
s _{Output Current}
± 20mA
s _{CMRR at 10MHz}
48dB
s _{LT1193 Pin Out}
s _{Low Cost}
s _{Single 5V Operation}
s _{Drives Cables Directly}
s _{Output Shutdown}
APPLICATI S
s _{Line Receivers}
s _{Video Signal Processing}
s _{Cable Drivers}
s _{Tape and Disc Drive Systems}
DESCRIPTIO
The LT1189 is a difference amplifier optimized for opera-
tion on ±5V, or a single 5V supply, and gain ≥ 10. This
versatile amplifier features uncommitted high input im-
pedance (+) 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 LT1189’s high slew rate, 220V/µs, wide bandwidth,
35MHz, and ±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 LT1189 is a low power, gain of 10 stable version of the
popular LT1193, and is available in 8-pin miniDIPs and SO
packages. For lower gain applications see the LT1187
data sheet.
TYPICAL APPLICATI
Cable Sense Amplifier for Loop Through Connections
with DC Adjust
V_IN
CABLE
V_DC
5V
3
+
2
7
–
6
1
LT1189
+
8–
4
–5V
909Ω
V_OUT
100Ω
LT1189 • TA01
Closed-Loop Gain vs Frequency
50
40
30
20
10
0
0.1
V_S = ±5V
R_L = 1k
1
10
FREQUENCY (MHz)
100
LT1189 • TA02
1