LT1254 查看數據表（PDF） - Linear Technology

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LT1254

Low Cost Dual and Quad Video Amplifiers

Linear Technology 

FEATURES

s Low Cost

s Current Feedback Amplifiers

s Differential Gain: 0.03%, RL = 150Ω, VS = ±5V

s Differential Phase: 0.28°, RL = 150Ω, VS = ±5V

s Flat to 30MHz, 0.1dB

s 90MHz Bandwidth on ±5V

s Wide Supply Range: ±2V(4V) to ±14V(28V)

s Low Power: 60mW per Amplifier at ±5V

APPLICATI S

s RGB Cable Drivers

s Composite Video Cable Drivers

s Gain Blocks in IF Stages

TYPICAL APPLICATI

5V

VIN

+

1/2 LT1253

–

–5V

RF

620Ω

RG

620Ω

75Ω

75Ω

CABLE

VOUT

75Ω

AV =

1

+

RF

RG

BW = 90MHz

AT AMPLIFIER OUTPUT.

6dB LESS AT VOUT.

LT1253/54 • TA01

LT1253/LT1254

Low Cost Dual and Quad

Video Amplifiers

DESCRIPTIO

The LT1253 is a low cost dual current feedback amplifier

for video applications. The LT1254 is a quad version of the

LT1253. The amplifiers are completely isolated except for

the power supply pins and therefore have excellent isola-

tion, over 94dB at 5MHz. Dual and quad amplifiers signifi-

cantly reduce costs compared with singles; the number of

insertions is reduced and fewer supply bypass capacitors

are required. In addition, these duals and quads cost less

per amplifier than single video amplifiers.

The LT1253/LT1254 amplifiers are ideal for driving low

impedance loads such as cables and filters. The wide

bandwidth and high slew rate of these amplifiers make

driving RGB signals between PCs and workstations easy.

The excellent linearity of these amplifiers makes them

ideal for composite video.

The LT1253 is available in 8-pin DIPs and the S8 surface

mount package. The LT1254 is available in 14-pin DIPs

and the S14 surface mount package. Both parts have the

industry standard dual and quad op amp pin out. For

higher performance, see the LT1229/LT1230.

Transient Response

VS = ±5V

AV = 2

RL = 150Ω

VO = 1V

LT1253/54 • TA02

1

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