1

2

3

4

5

6

7

8

9

10

0

200

400

600

800

1000

1200

1400

1600

GAIN (V/V)

V

+

SD

7

RF

IN 3

+

-

1

RIN0

IN 0

5

IN 2

3

IN 1

RIN3

RIN2

RIN1

10

8

12

13

11

9

14

6

V

-

RT

A0

RT

A1

VOUT

ROUT

RG

RT

EN

RT

2, 4

13

LMH6574

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SNCS103E – NOVEMBER 2004 – REVISED AUGUST 2018

Product Folder Links: LMH6574

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Copyright © 2004–2018, Texas Instruments Incorporated

7 Detailed Description

7.1 Functional Block Diagram

7.2 Feature Description

7.2.1 Video Performance

The LMH6574 has been designed to provide excellent performance with production quality video signals in a

wide variety of formats such as HDTV and High Resolution VGA. Best performance will be obtained with back-

terminated loads. The back termination reduces reflections from the transmission line and effectively masks

transmission line and other parasitic capacitances from the amplifier output stage. The Functional Block Diagram

shows a typical configuration for driving a 75

Ω cable. The output buffer is configured for a gain of 2, so using

back terminated loads will give a net gain of 1.

7.2.2 Feedback Resistor Selection

Figure 27. Suggested RF vs Gain