LT1398 查看數據表（PDF） - Linear Technology
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LT1398 Datasheet PDF : 16 Pages
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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
VIN A
RG
200Ω
A
CHANNEL
SELECT
+ EN A
1/3 LT1399
–
RF
324Ω
BC
97.6Ω
75Ω
CABLE
VIN B
RG
200Ω
+ EN B
1/3 LT1399
–
RF
324Ω
97.6Ω
VOUT
75Ω
VIN C
RG
200Ω
+ EN C
1/3 LT1399
–
RF
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
RL = 100Ω
RF = RG = 324Ω
f = 10MHz
TIME (10ns/DIV)
1398/99 TA02
1
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