ISL59442IB(2005) データシートの表示（PDF） - Intersil

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ISL59442IB
(Rev.:2005)

1GHz, 4 x 1 Multiplexing Amplifier

Intersil 

AC Test Circuits

VIN

50Ω

or

75Ω

ISL59442

CL

2pF

RL

500Ω

ISL59442

ISL59442

RS

VIN

50Ω

CL 475Ω

50Ω

or

2pF

or

75Ω

75Ω

TEST EQUIPMENT

50Ω

or

75Ω

FIGURE 21A. TEST CIRCUIT WITH OPTIMAL OUTPUT LOAD

FIGURE 21B. TEST CIRCUIT FOR MEASURING WITH A 50Ω OR 75Ω

INPUT TERMINATED EQUIPMENT

VIN

50Ω

or

75Ω

ISL59442

RS

CL 50Ω or 75Ω

2pF

TEST EQUIPMENT

50Ω

or

75Ω

FIGURE 21C. BACKLOADED TEST CIRCUIT FOR VIDEO CABLE APPLICATION. BANDWIDTH AND LINEARITY FOR RL LESS THAN 500Ω WILL BE

DEGRADED

NOTE: Figure 21A illustrates the optimum output load for testing AC performance. Figure 21B illustrates the optimum output load when connecting

to input terminated equipment. Figure 21C illustrates back loaded test circuit for video cable.

Application Circuits

VIN

50Ω

*CL = CT + COUT

-

VOUT

+

CT

1.6pF

COUT

0pF

RL = 500Ω

*CL: TOTAL LOAD CAPACITANCE

CT: TRACE CAPACITANCE

COUT: OUTPUT CAPACITANCE

FIGURE 22A. SMALL SIGNAL 200mVP-P APPLICATION CIRCUIT

VIN

50Ω

RS

-

25Ω

VOUT

+

1.6pF CT

COUT

RL = 500Ω

22pF

CL = CT + COUT

FIGURE 22B. LARGE SIGNAL 1VP-P APPLICATION CIRCUIT

8

FN7452.2

September 21, 2005

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