LINEAR TECHNOLOGY LT1398 LT1399 LT1399HV Owner's Manual
Summary
The LT1398/LT1399/LT1399HV provides low-cost, high-performance current feedback amplifiers with 300MHz bandwidth and independent channel control. Ideal for engineers developing portable equipment, video multiplexers, or broadcast systems, these chips offer fast switching, robust shutdown features, and operate across wide supply ranges (-2V to 15V). This manual provides comprehensive technical data sheets, electrical specifications, and example circuits necessary for integrating high-speed signal conditioning into demanding professional applications.
Page 1 Text Content
LT1398/LT1399/LT1399HV Low Cost Dual and Triple 300MHz Current Feedback Amplifiers with Shutdown
FEATURES DESCRIPTIO 300MHz Bandwidth on ±5V (AV = 1, 2 and –1)
The LT®1399 and LT1399HV contain three independent
0.1d B Gain Flatness: 150MHz (AV = 1, 2 and –1)
300MHz current feedback amplifiers, each with a shut-
Completely Off in Shutdown, 0µA Supply Current
down pin. The LT1399HV is a higher voltage version of the
High Slew Rate: 800V/µs
LT1399. The LT1398 is a two amplifier version of the
Wide Supply Range:
LT1399.
±2V(4V) to ±6V(12V) (LT1398/LT1399)
The LT1398/LT1399 operate on all supplies from a single
±2V (4V) to ±7.5V (15V) (LT1399HV)
4V to ±6V. The LT1399HV operates on all supplies from 4V
80m A Output Current
to ±7.5V.
Low Supply Current: 4.6m A/Amplifier Fast Turn-On Time: 30ns Each amplifier draws 4.6m A when active. When disabled Fast Turn-Off Time: 40ns each amplifier draws zero supply current and its output be- 16-Pin Narrow SO/Narrow SSOP Packages comes high impedance. The amplifiers turn on in only 30ns
and turn off in 40ns, making them ideal in spread spectrum
APPLICATIO S
and portable equipment applications.
RGB Cable Drivers The LT1398/LT1399/LT1399HV are manufactured on Lin- LCD Drivers ear Technology’s proprietary complementary bipolar pro- Spread Spectrum Amplifiers cess. The LT1399/LT1399HV are pin-for-pin upgrades to MUX Amplifiers the LT1260 optimized for use on ±5V/±7.5V supplies.
Composite Video Cable Drivers , LTC and LT are registered trademarks of Linear Technology Corporation.
Portable Equipment
TYPICAL APPLICATIO 3-Input Video MUX Cable Driver
CCHANNEL
SELECT EN A Square Wave Response
VIN A
1/3 LT1399RG
CABLE
OUTPUT
EN B 75Ω 200m V/DIV
VIN B
1/3 LT1399RG
RF 324Ω
1398/99 TA02RL = 100Ω
TIME (10ns/DIV)
RF = RG = 324Ω
f = 10MHz
VIN C
97.6Ω 1399 TA01
1/3 LT1399RG
RF 324Ω
sn13989 13989fas
Page Summary Contents For LINEAR TECHNOLOGY LT1398 LT1399 LT1399HV Owner's Manual
Manual Details
| Brand | Linear |
|---|---|
| Pages | 16 |
| File Size | 423.46 KB |
| Published | June 21, 2026 |
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Frequently Asked Questions
What are the operating temperature ranges for these amplifiers?
The specified operating temperature range is –40°C to 85°C, and the junction temperature maximum (JMAX JA T) is 150°C.
How do I ensure good channel isolation?
For best channel isolation, ground pins should be connected to ground.
What are the current consumption details?
Each amplifier draws 4.6mA when active and zero supply current when disabled (Shutdown Mode).
Are there differences between LT1398/LT1399 and the LT1399HV?
The LT1399HV is a higher voltage version, offering a wider operating supply range up to 15V.