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LT1398 Datasheet(PDF) 1 Page - Linear Technology

Part No. LT1398
Description  Low Cost Dual and Triple 300MHz Current Feedback Amplifiers with Shutdown
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Maker  LINER [Linear Technology]
Homepage  http://www.linear.com
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1
LT1398/LT1399/LT1399HV
Low Cost Dual and Triple
300MHz Current Feedback
Amplifiers with Shutdown
3-Input Video MUX Cable Driver
The LT
®1399 and LT1399HV contain three independent
300MHz current feedback amplifiers, each with a shut-
down pin. The LT1399HV is a higher voltage version of the
LT1399. The LT1398 is a two amplifier version of the
LT1399.
The LT1398/LT1399 operate on all supplies from a single
4V to
±6V.TheLT1399HVoperatesonallsuppliesfrom4V
to
±7.5V.
Each amplifier draws 4.6mA when active. When disabled
each amplifier draws zero supply current and its output be-
comes high impedance. The amplifiers turn on in only 30ns
and turn off in 40ns, making them ideal in spread spectrum
and portable equipment applications.
The LT1398/LT1399/LT1399HV are manufactured on Lin-
ear Technology’s proprietary complementary bipolar pro-
cess. The LT1399/LT1399HV are pin-for-pin upgrades to
the LT1260 optimized for use on
±5V/±7.5V supplies.
s
300MHz Bandwidth on
±5V (AV = 1, 2 and –1)
s
0.1dB Gain Flatness: 150MHz (AV = 1, 2 and –1)
s
Completely Off in Shutdown, 0
µA Supply Current
s
High Slew Rate: 800V/
µs
s
Wide Supply Range:
±2V(4V) to ±6V(12V) (LT1398/LT1399)
±2V (4V) to ±7.5V (15V) (LT1399HV)
s
80mA Output Current
s
Low Supply Current: 4.6mA/Amplifier
s
Fast Turn-On Time: 30ns
s
Fast Turn-Off Time: 40ns
s
16-Pin Narrow SO/Narrow SSOP Packages
s
RGB Cable Drivers
s
LCD Drivers
s
Spread Spectrum Amplifiers
s
MUX Amplifiers
s
Composite Video Cable Drivers
s
Portable Equipment
, LTC and LT are registered trademarks of Linear Technology Corporation.
Square Wave Response
OUTPUT
200mV/DIV
TIME (10ns/DIV)
1398/99 TA02
RL = 100Ω
RF = RG = 324Ω
f = 10MHz
FEATURES
DESCRIPTIO
APPLICATIO S
TYPICAL APPLICATIO
+
1/3 LT1399
RG
200
RF
324
A
EN A
VIN A
+
1/3 LT1399
RG
200
RF
324
EN B
VIN B
BC
CHANNEL
SELECT
97.6
97.6
+
1/3 LT1399
RG
200
RF
324
EN C
VIN C
97.6
75
VOUT
75
CABLE
1399 TA01




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