LT1398 Datasheet, PDF (1/16 Pages) Linear Technology – Low Cost Dual and Triple 300MHz Current Feedback Amplifiers with Shutdown

FEATURES
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, 0µA 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}
U
APPLICATIO S
s _{RGB Cable Drivers}
s _{LCD Drivers}
s _{Spread Spectrum Amplifiers}
s _{MUX Amplifiers}
s _{Composite Video Cable Drivers}
s _{Portable Equipment}
TYPICAL APPLICATIO
3-Input Video MUX Cable Driver
V_{IN A}
R_G
200Ω
A
CHANNEL
SELECT
+ ^{EN A}
1/3 LT1399
–
R_F
324Ω
BC
97.6Ω
75Ω
CABLE
V_{IN B}
R_G
200Ω
+ ^{EN B}
1/3 LT1399
–
R_F
324Ω
97.6Ω
V_OUT
75Ω
V_{IN C}
R_G
200Ω
+ ^{EN C}
1/3 LT1399
–
R_F
324Ω
97.6Ω
1399 TA01
LT1398/LT1399/LT1399HV
Low Cost Dual and Triple
300MHz Current Feedback
Amplifiers with Shutdown
DESCRIPTIO
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. The LT1399HV operates on all supplies from 4V
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Square Wave Response
OUTPUT
200mV/DIV
R_L = 100Ω
R_F = R_G = 324Ω
f = 10MHz
TIME (10ns/DIV)
1398/99 TA02
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