CLC407 datasheet(6/8 Pages) NSC

6 / 8 page

Use

power-supply

bypassing

capacitors

when

operating this amplifier. Choose quality 0.1

µF ceramics

for C1 and C2. Choose quality 6.8µF tantalum capacitors

for C3 and C4. Place the 0.1µF capacitors within 0.1

inches from the power pins. Place the 6.8

µF capacitors

within 3/4 inches from the power pins.

Special Evaluation Board

Considerations for the CLC407

To optimize off-isolation of the CLC407, cut the Rf trace on

both the 730013 and the 730027 evaluation boards. This

cut minimizes capacitive feedthrough between the input

and the output. Figure 4 shows where to cut both evalu-

ation boards for improved off-isolation.

Figure 4

Video Performance vs. IEX

Improve the video performance of the CLC407 by drawing

extra current from the amplifier’s output stage. Using a

single external resistor as shown in Figure 5, you can

adjust the differential phase. Video performance vs. IEX is

illustrated below in Graph 2.

This graph represents

positive video performance with negative synchronization

pulses.

Graph 2

The value for Rpd in Figure 5 is determined by:

at +5V supplies.

Figure 5

Video Cable Driver

The CLC407 was designed to produce exceptional video

performance at all three closed-loop gains. At the non-

inverting gain of 2V/V configuration, back terminate the

cable using Rout. A typical cable driving configuration is

shown below in Figure 6.

Figure 6

N:1 Mux Cable Driver

The CLC407 is capable of multiplexing several signals on a

single analog output bus. The front page shows how a 2:1

multiplexer is implemented. An N:1 multiplexer is implement-

ed in an analogous fashion by using an N:1 decoder to

enable/disable the appropriate number of CLC407’s.

Ordering Information

Model

Temperature Range

Description

CLC407AJP

-40˚C to +85˚C

8-pin PDIP

CLC407AJE

-40˚C to +85˚C

8-pin SOIC

CLC407AIB

-40˚C to +85˚C

8-pin CerDIP

CLC407ALC

-40˚C to +85˚C

dice

CLC407A8B

-55˚C to +125˚C

8-pin CerDIP, MIL-STD-883

CLC407AMC

-55˚C to +125˚C

dice, MIL-STD-883

Contact factory for other packages and DESC SMD number.

Package Thermal Resistance

Package

qjc

qjA

Plastic (AJP)

75˚/W

125˚/W

Surface Mount (AJE)

130˚/W

150˚/W

CerDip

65˚/W

155˚/W

730013

REV C

Cut trace here

SMA

Output

SMA

Input

Rin

Ω

Rout

Ω

+5V

-5V

0.1

µfd

0.1

µfd

6.8

µfd

6.8

µfd

J1 = 0

Ω

CLC407

Rpd

IEX

Differential Gain & Phase vs. IEX

IEX in mA

405 G

0.25

0.20

0.15

0.10

0.05

0.25

0.20

0.15

0.10

0.05

Phase

Gain

Coax

Ω

SMA

Input

Rin

Ω

Rout

Ω

+5V

-5V

0.1

µfd

0.1

µfd

6.8

µfd

6.8

µfd

J1 = 0

Ω

CLC407

Ω

Video

Output

OUT

-Vcc

+Vcc

GND

Comlinear

A National Semiconductor Company

(303) 226-0500

407 Fig 3 (Right)

Cut trace here

http://www.national.com

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