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LT1398/LT1399/LT1399HV

sn13989 13989fas

Low Cost Dual and Triple

300MHz Current Feedback

Amplifiers with Shutdown

3-Input Video MUX Cable Driver

The LT

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

s

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

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Fast Turn-On Time: 30ns

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Fast Turn-Off Time: 40ns

s

16-Pin Narrow SO/Narrow SSOP Packages

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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

f = 10MHz

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO

–

+

1/3 LT1399

200

Ω

324

Ω

A

EN A

–

+

1/3 LT1399

200

Ω

324

Ω

EN B

BC

CHANNEL

SELECT

97.6

Ω

97.6

Ω

–

+

1/3 LT1399

200

Ω

324

Ω

EN C

97.6

Ω

75

Ω

75

Ω

CABLE

1399 TA01