ISL59420(2012) Ver la hoja de datos (PDF) - Intersil

Número de pieza

componentes Descripción

Fabricante

ISL59420
(Rev.:2012)

400MHz Multiplexing Amplifier

Intersil 

AC Test Circuits

ISL59420

RG RF

AV = 1, 2

RS

VIN

50Ω

or

CL

475Ω

or

50Ω

or

75Ω

462.5Ω

75Ω

ISL59420

TEST

EQUIPMENT

50Ω

or

75Ω

ISL59420

RG RF

VIN

50Ω

or

75Ω

AV = 1, 2

RS

CL 50Ω or 75Ω

TEST

EQUIPMENT

50Ω

or

75Ω

FIGURE 25A. TEST CIRCUIT FOR MEASURING WITH A 50Ω OR 75Ω

INPUT TERMINATED EQUIPMENT

FIGURE 25B. BACKLOADED TEST CIRCUIT FOR VIDEO CABLE

APPLICATION. BANDWIDTH AND LINEARITY FOR RL

LESS THAN 500Ω WILL BE DEGRADED.

NOTE: Figure 25A illustrates the optimum output load when connecting to input terminated equipment. Figure 26B illustrates backloaded test circuit for

video cable applications.

Application Circuits

200Ω

VIN

50Ω

-

+

0.6pF

CG

PC BOARD

CAPACITANCE

*CL = CT + COUT

CT

1.6pF

COUT

3.9pF

VOUT

RL = 500Ω

0.4pF < CG < 0.7pF

*CL: TOTAL LOAD CAPACITANCE

CT: TRACE CAPACITANCE

COUT: OUTPUT CAPACITANCE

FIGURE 26A. GAIN OF 1 APPLICATION CIRCUIT

VIN

50Ω

453Ω

453Ω

-

*CL = CT + COUT

+

0.6pF

CG

PC BOARD

CAPACITANCE

CT

1.6pF

COUT

3.9pF

0.4pF < CG < 0.7pF

FIGURE 26B. GAIN OF 2 APPLICATION CIRCUIT

VOUT

RL = 500Ω

9

FN7459.2

July 3, 2012

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